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Item G3 BOARD OF COUNTY COMMISSIONERS AGENDA ITEM SUMMARY MEETING DATE: 01/17/01 DIVISION: COUNTY ADMINISTRATOR BULK ITEM: NO DEPARTMENT: AIRPORTS AGENDA ITEM WORDING: Presentation by Deborah Murphy of URS Greiner concerning the ongoing Noise Insulation Program (NIP) for 300 homes in the vicinity of Key West International Airport. And approval of the NIP Treatment Policies and Procedures. ITEM BACKGROUND: Ms. Murphy will present a briefing to the BOCC with an over view of the program and the progress made to date. The Treatment Policies and Procedures manual (attached) is mostly technical in nature establishing program policy concerning the type of products that wiIJ be offered to project homeowners. PREVIOUS RELEVANT BOCC ACTION: Federal Aviation Administration grant to begin this project approved 8/15/00. STAFF RECOMMENDATION: Approval of the NIP Treatment Policies and Procedures TOTAL COST: N/A to this item. BUDGETED: N/A COST TO COUNTY: N/A REVENUE PRODUCING: N/A AMOUNT PER MONTHIYEAR: N/A APPROVED BY: County Attorney N/A OMB/Purchasing N/A Risk Management N/A y~t+ SUBMITTED BY: Peter J. Horton DOCUMENTATION: Included X To Follow Not Required AGENDA ITEM # l~? DISPOSITION: /pjh APD - - - KEY WEST INTERNATIONAL AIRPORT - PART 150 NOISE COMPATABILITY PROGRAM - - NOISE INSULATION PROGRAM - TREATMENT POLICIES AND PROCEDURES - - - - Decem ber 27, 2000 - - Submitted by: - URS - - In Conjunction with: Jones Payne Architects & Planners, Inc. Wyle Laboratories, Inc. Terrell Hundley Carroll, Inc. - - - Dated 12/27/00 Based on Airport Review meeting 12/18/00 TABLE OF CONTENTS 1.1 PILOT PROJECT 1.2 WINDOWS 1.3 DOORS 1.4 ATTICS, WALLS AND CEILINGS 1.5 PULL DOWN STAIRS, A TTICIROOF HATCHES, SKYLIGHTS 1.6 HEATING AND VENTILATION 1.7 AIR CONDITIONING 1.8 PAINTING 1.9 BRAKE METAL 1.10 MISCELLANEOUS OPENINGSIPATHS 1.11 TREATMENT ELIGIBLE SPACES Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual- Treatments Key West International Airport Revised December2000 1.1 1.1 PILOT PROJECT This is the first phase for implementation of the Noise Compatibility Program for the Key West International Airport. In establishing treatment guidelines the following are to be considered: . FAA mandated acoustical requirements . Diversity of Architecture found in the eligible housing stock . Environmental Conditions related to Southern Florida . Homeowner concerns that treatments be done in a way that are sympathetic to the look and feel of their homes . Community reaction to sound insulation . Directives from Building Director for the City of Key West Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual - Treatments Key West International Airport Revised December2000 1.2 1.2 WINDOWS A well-sealed prime window along with a high performance secondary glazing system is the primary treatment approach for sound insulating the noise path through windows. Primary and secondary glazing systems are to be separated by a minimum two inch (2") air space and must meet minimum air infiltration and STC performance criteria as follows: Product Air Infiltration STC Acoustical Windows Less than .25 cfm/linear foot of crack at 40 1.57 psf. 39 for Casements Non-Acoustical Less than .25 cfmllinear foot of crack at 29 Windows 1.57 psf. Storm Windows Less than .33 cfmllinear foo.t of crack at N/A 1.57 psf. The program shall offer two kinds of acoustical prime window: · a vinyl composite window consisting of a prime vinyl window with insulated glass and a factory-installed high performance storm window, . or a metal dual window consisting of two aluminum single-glazed parallel sashes mounted in a single frame connected by a thermal break. Styles shall be double hung, fixed or gliding or combinations thereof. Projecting windows such as awnings and casements are to be considered on an as needed basis following assessments. It is believed that none of the homes in the program area will require any historic property review. Standard window treatment shall be to provide prime window replacement for all residences in noise exposure areas of 65-75+ Lein. Treatment may be provided on a case-by-case basis for certain portions of the residence that are deemed non-complying with program minimum standards. Since the Program does not offer wood windows, Homeowners wishing to retain their wood windows and have "storm only treatment" will be considered based on Acoustical consultation or testing. The windows must be in good condition and meet the Program's acoustical guidelines for the home to be considered for the balance of the acoustical treatments. (Reference Section 1.10: Treatment Eligible Spaces) Other window options/limitations are as noted below: · Manufacturers: As a publicly funded project, products representing multiple manufacturers will be specified where available. As such the Homeowners will not be guaranteed selection of specific products by a certain manufacturer. All products will be in similar quality ranges and will perform to the specified standards. · Operation: Operable windows must either tilt or otherwise allow removal of both the primary and secondary glazing systems to the interior for ease of maintenance by the Homeowner. Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual- Treatments Key West International Airport Revised December2000 1.3 . Color: The prime portion of the vinyl composite window is available in white, almond or bronze. The factory-installed storm windows are available in white, almond or bronze. The metal dual windows are available in white, bronze, or mill-finish aluminum. As a general rule on window color, program policy is that the Homeowner can choose only one color for prime windows and one color for storm windows. The program will not provide different window colors at different locations in the residence. There is color variation among manufacturers approved for the Program. . Shapes: Polygon, arch and 'eyebrow' shapes are offered by the program within the limits of options available from approved product manufacturers. Shapes are not available as a composite window and must be researched to assure the program can install a prime and storm assembly. "Bowed" or Curved (i.e., convex in a horizontal plane) storm or prime windows are not offered by the program. . Bay or Box windows: The program may treat ,these windows depending on their construction. Issues of roofing, sill conditions, support conditions and design aesthetics will all be considered in making a recommendation for treatments. . First treatment option will be replace the projecting window assembly with a standard flat program window. . Second treatment option will be to provide an interior sliding storm window at the plane of the wall providing the window is not vinyl. . Additionally, depending on the manufacturer and existing condition, storms may be added to the exterior. . Glazing: The program has been required by the City of Key West to meet MiamilDade product standards for hurricanes where possible. Impact resistant glass will be provided in products that meet the standards. Low-E or tinted glass will be provided as a program option to assist in meeting the energy requirements for the new air-conditioning systems. Opaque/diffused glass is provided only at windows where it is an existing condition or where it is required to mask a window that has been covered over on the interior. Safety glass is provided at locations as required by code. . Storm Protection: Where acoustically rated doors and windows do not meet the MiamilDade product control standards, the program will provide storm protection for the openings. Homeowners who do not have existing storm protection will receive a program standard of removable sheet metal shutters. Houses with awning or accordion storm protection will have their products left in place or reinstalled where necessary. If the size of a window is changed to meet egress requirements, the program will provide new protection to match the existing style. . Grilles: Decorative grilles are available as a feature of the vinyl replacement windows. Grilles for the vinyl composite are installed between the panes of insulated glass. Grilles are available for windows that have existing grilles or at all treatment eligible windows within the residence if grilles are present at most of the existing windows. Grilles are available for both upper and lower sash per Homeowner preference. 1. Grille styles (i.e., nine lite, six lite, etc.) normally match existing styles or are determined per the window manufacturer's recommendations according to sash size. Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual - Treatments Key West International Airport Revised December2000 1.4 2. Grilles in a diamond configuration are only provided where existing, and are subject to availability from the manufacturer. 3. Grilles that adhere to the exterior face of the insulated glass are not specified for use in the program, nor are "true" divided lites. Since the grilles are interior to the insulated glass, they can not be changed without replacing the window. · Screens: Half screens are a feature of the storm windows that are installed with the vinyl composite windows. A nylon screen fabric is preferred for its non-corrosive properties. Metal windows can come with either half or full screens. · Safety Latches: The program will provide the normal latch feature for the window that is available from the manufacturer. · Inside Stops: The prevalent existing jamb condition is plaster returns. Gypsum wallboard and plaster will be reinstalled following the window' installation. All wooden inside stops (whether painted or stained) are to be replaced unless the Homeowner specifically requests they be retained at the pre-walk. Contract documents will specify replacement. New stops will be installed with same type fasteners used to anchor original stops. Other program guidelines/policies that pertain to window products/installations are listed below: · Window Sizing: Replacement windows should be sized to match existing openings; this typically involves manufacturing a custom window rather than an "off-the-shelf' standard size. The set-up of combination windows should be designed to maximize the area of glazing in the unit. This means that jambs should be mulled back-to-back at non-structural mullions. Exceptions to the policy of matching existing window size should be considered if it creates a window condition that is difficult or hazardous for the Homeowner to maintain. An example of this is if there is an existing large picture window that has no storm window. Replacement with an acoustical window with a storm window would require the Homeowner to remove a large deadlite storm window to clean between the prime and storm. The Architect will use discretion in reviewing such situations. Replacing large fixed windows (i.e., greater than 25 sq. feet) with a combination window is an acceptable exception to matching existing styles. · Security Alarms: The Program will be responsible for removing any existing window alarm system and, if so desired, for reinstalling on the new windows. · Window Air Conditioners: The Program will be responsible for removing any window air conditioners before installation of the new windows. The Homeowner is encouraged to accept the program option of installing whole house air conditioning rather than reinstalling a window air conditioner through the new windows. In-wall air conditioners will be removed and the wall in-filled. · Blinds and Shades: The Contractor is required to remove and reinstall mini-blinds and ro11- up shades as required to install the replacement windows. This may involve trimming shades or replacing shade or blind hardware. Typically, blinds cannot be trimmed. Should the Homeowner purchase new blinds or shades prior to the final inspection, the contractor is Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual - Treatments Key West International Airport Revised December2000 I.S required to install these in lieu of the original blinds/shades. Other window treatments, such as draperies, vertical blinds or curtains, will be removed by the Contractor prior to construction, if the Homeowner has left them in place. Should original window coverings require adjustment or replacement due to increased window size, the Program will provide the Homeowner with a stipulated sum towards the purchase of new window treatments. . Homeowners are advised of potential problems or limitations to reinstallation of existing blinds/shades by the Architect at the assessment visit. . Styles: The style of the replacement windows should match the existing window that it replaces. There are two exceptions to this policy: . First, if an existing window is a projecting type window (casement, awning, jalousie or hopper) the replacement window style can be changed to a non-projecting style such as a double hung or a gliding window. The recommended style of the replacement window shall be determined by the Architect and confIrmed with the Homeowner in consideration of code requirements and the prevailing window style and proportions at the residence. Where Homeowners want to retain stacked multiple awnings, only metal windows will be offered and only where it does not conflict with bedroom egress requirements. . Second, if an existing window is a window used for egress, then its style can be changed to insure that the replacement window meets egress dimension requirements. An example of this would be if an existing window condition were two side-by-side double hung windows where unit replacement is required, but the height of the clear opening does not meet code. The style of the replacement unit should be changed to a 'XX' gliding window to meet code egress requirements. The program may consider installing Casement windows where it will solve egress diffIculties depending on the recommendation from the Project Architect. . Emergency Egress Windows: Per direction of the City of Key West Building Department, installation of the program's acoustical replacement windows in rooms used for sleeping purposes requires enlarging non-conforming window openings or lowering non-conforming window sills to meet egress requirements. The Architect shall review egress requirements for each bedroom window with respect to sizing requirements. The Program is willing to provide a consistent match to the predominant window style chosen by the Homeowner (double hung, glider, etc.) in bedroom windows, even if it necessitates altering a wall that could meet egress if a different window style were used. Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual - Treatments Key west International Airport Revised December2000 1.6 1.3 DOORS Door treatment shall be provided to all residences within the program noise exposure areas. There are two main door types used in the program; leaf doors and sliding doors. The primary treatment approach to sound insulate the noise path through leaf doors is to insure that there is a well-sealed prime door along with a high performance storm door. Sliding doors are comprised of insulated glazing with laminated glass. Where acoustically rated doors do not meet the Miami/Dade product control standards, the program will provide storm protection for the openings. Homeowners who do not have existing storm protection will receive a program standard of removable sheet metal shutters. Door characteristics are as noted below: Leaf Doors: . The prime (STC 29) and storm (STC 30) doors are to' be separated by a minimum two-inch arr space. . A prime door only may be used if it has an STC of 40. . Prime leaf doors installed at exterior locations shall be made of dimensionally stable and non- corrosive material, preferably aluminum. . Where wood prime leaf doors are installed at exterior locations due to Homeowner considerations, they should be 1-3/4" thick solid core wood, panel type. The thickness of the panels at the hip shall be not less than 1-1/8" thick. . Glazing is permitted in leaf doors as long as it is insulated and constitutes no more than fifty percent of the door's surface area. . Doors at interior locations shall be 1-3/8" thick. The glazing in interior doors such as these need not be insulated glass or limited to fifty percent of door area. . Louvered doors are sometimes installed by the program where it is necessary to connect the volumes of interior spaces to meet mechanical air requirements. Sliding! Atrium Doors: . Sliding doors shall have an air infiltration rate of not greater than .25 cfm per linear foot of crack at 1.56 psfand an STC of 38-40 if used without secondary glazing. Prime sliding doors installed at exterior locations shall be made of dimensionally stable and non-corrosive material, preferably aluminum. · Atrium/French type doors shall have an air infiltration rate of not greater than .25 cfm per linear foot of crack at 1.56 psf and an STC of 38-40 if used without secondary glazing. In- swinging wood Atrium Doors will be provided with secondary glazing consisting of a sliding glass secondary door or double leaf out-swinging secondary doors. · French doors that swing out and meet the acoustical goals of the program are not available at this point. The Program is working with manufacturers to develop interest in providing such a product. Homeowners with existing outswinging French doors will either have their door replaced with a Slider or Atrium door. A second option of installing an interior sliding secondary door is possible depending on the thickness of the wall. Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual - Treatments Key West International Airport Revised December2000 1.7 Other program guidelines/policies that pertain to door products/installations are listed below: . Finish and Colors: . The prime leaf doors will be provided with factory applied finish or the program will field finish as needed. . The leaf storm doors have either a vinyl or metal cladding as an exterior finish over a particle board core. The Homeowner is not given a choice of finish, but is allowed to choose a color of white, bronze, black or almond color. . The sliding prime door comes with a factory-applied finish. The sliding storm door installed in conjunction with the prime slider is aluminum and comes in white, bronze, beige or mill finish aluminum. . The atrium prime door comes with a factory applied vinyl cladding or flexicron coating on the exterior surface. The interior face of the door is bare untreated wood, which the program will paint, or stain a color of the Homeowner's choosing. The sliding storm door installed in conjunction with the prime is aluminum and comes in white, bronze, beige or mill fmish aluminum. . Occasionally, the program replaces exterior double-leaf prime doors or atrium type doors where they are found as an existing condition. The finish choices for these replacement doors are consistent with the preceding discussions for prime leaf and prime sliding doors. Double leaf storm doors or sliding storm doors can be installed on either of these door types. As program products are made by different manufacturers, Homeowners are to be made aware that different products may have color variations and not match exactly. For example, the 'bronze' storm doors may not match the 'terratone' cladding on the sliding doors, or the 'beige' storm doors may not match the 'almond' storm windows. Homeowners are not able to choose manufacturers and need to be aware of the range of possibilities if choosing a color other that white. . Glazing: Prime doors require a minimum Y2" insulated glass, laminated glass will be provided as necessary in the sliding doors to meet hurricane requirements or STC goals. No gases as part of the insulated glass assembly will be permitted. Low-E or tinted glass will be provided in sliding doors as a program option to assist in meeting the energy requirements for the new air-conditioning systems. Opaque/diffused glass is provided only at doors where it is an existing condition. Stained glass is not provided even to match an existing condition. Safety glass is provided at all doors as required by code. . Grids: Decorative grids are available as a feature of the replacement leaf and sliding prime doors. Most prime door styles have a snap-in grille installed over the face of the insulated glass. The leaf storm doors come with grille inserts. . Side-lites: The Program will provide a new single or double side-lite frame for the prime doors as needed to match existing conditions. Opaque/diffused glass is provided only at doors where it is an existing condition. Stained glass is not provided even to match an existing condition. Safety glass is provided at all side-lites as required by code. Additional storm panels will be required over the side-lite glass to achieve the sound reduction and will be shown in the window treatments. Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual- Treatments Key West International Airport Revised December2000 1.8 . Styles: Homeowners are given a choice of styles for prime, and storm doors as illustrated by the style selection sheets. Interior doors are an 1 3/8" flush, solid core door. . Screens: Screen inserts are a feature of the leaf storm doors. These are removable and a glazed panel insert is provided for alternate use. Prime sliding and atrium doors come with sliding screens. A nylon screen fabric is preferred for its non-corrosive properties. . Hardware: The program provides a standard hardware package for replacement interior and exterior doors. For exterior doors the hardware package includes: three brass or stainless steel hinges, a keyed-in-mob lockset, a deadbolt with interior latch, and a peephole view finder (optional). For storm doors the hardware package includes: three stainless steel hinges, thumb activated pull latch, night latch, keyed lock, pneumatic closer and safety chain. Interior door hardware consists of three brass or stainless steel hinges and passage or a lock set. Deadbolts with interior key locking features are not permitted since they violate code egress requirements. The style and finish of the hardware is confirmed with the Homeowner and the construction pre-walk. The program standard finish is bright brass or chrome in either "orbit" or "tulip" style. Homeowners may decline the hardware package offered by the program and instead request that their existing hardware may be installed on the replacement door. The program allows this where possible, except for interior key locking deadbolts. Homeowners may request that a new door and hardware set be "keyed-alike" to existing hardware elsewhere in the residence. The program allows this where possible. Keyed locks on sliding prime doors are an available option. . Weather-stripping: Each new exterior door and some interior doors must be fully weather- stripped in order to be acoustically effective. The prime sliding and atrium doors come with factory installed weather-stripping as part of a pre-hung condition. These doors are acceptable as is and require no further weather-stripping. Leaf prime doors installed at exterior locations must be weather-stripped at the head, jambs and sill. This weather-stripping requirement extends to pre-hung leaf doors unless their factory installed weather-stripping has been inspected and approved by the program's acoustical and design consultants. . A variety of bulb-type weather-stripping for head andjamb is approved by the program. The polyurethane bulb type is preferred since it does not mark the finish of the prime door. The sill sweep is a spring-activated vinyl sweep. The weather-stripping and sweep for the leaf storm doors should have a felt pile weather-stripping with fin seal at the head and jambs and double vinyl sweep at the sill. A brushed type or polypropylene sweep is not acceptable. It is important to the acoustical performance of the storm/prime assembly that the storm door weather-stripping sits on a threshold. Unit replacement of the prime-door frame and threshold may be necessary to achieve the proper installation. Other program guidelines/policies that pertain to door products/installations are listed below: . Egress to Unsafe Areas: Replacement prime and storm doors should not be installed at locations that egress to areas that are judged by the Program Architect to be unsafe. The correction of unsafe conditions is Homeowner pre-work. In the absence of the correction of these conditions, installation of the prime and storm doors may be permitted by fixing the Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual - Treatments Key West International Airport Revised December2000 1.9 doors closed provided the door is not a code required means of egress. These conditions should be reviewed on a case-by-case basis. . Landings: Replacement leaf storm should not be installed at locations where the absence of a code conforming landing is judged by the A&E Consultant to be a safety hazard. The correction of such a condition is Homeowner pre-work. Where the addition of a pre-cast concrete step or landing will solve the condition, the Program will provide the landing. . Railings: Replacement leaf storm doors should not be installed at locations where the absence of a code conforming railing is judged by the Architect to be a safety hazard. The correction of such a condition is Homeowner pre-work. . Metal Insulated Doors: Storm doors should not be installed on existing metal insulated doors. This is typically not allowed per the warranty conditions of the metal door manufacturer. . Electric Door Locks: The program will install replacement prime doors at locations where existing doors may have remotely activated electric door locks. The re-installation of the electric door locks will be done by the Program. . Security Alarms: The Program will be responsible for removing any existing door alarm system affected by the door replacement, and, if so desired, for reinstalling on the new door. . Through-Door Mail Slots: Replacement prime doors cannot be altered by the Program to include through-door mail slots at this undermines their acoustical performance. Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual - Treatments Key West International Airport Revised December2000 1.10 1.4 ATTICS, WALLS AND CEILINGS Certain conditions represent noise paths through attics, wall and ceilings to habitable spaces. There are a variety of treatment responses to these conditions. What follows is a discussion of policy and construction issues typical to attic, wall and ceiling treatments. . Gypsum Walls/Ceilings: Gypsum walls/ceilings are installed to provide additional mass to mitigate a noise path through a wall/ceiling, if the existing wall or ceiling does not have at least one layer of gypsum or plaster or equivalent. The additional layer should be a minimum 1/2" gypsum board with taped seams (preferably skim coat plaster). All new wall and ceiling finishes are primed and finish painted by the contractor to the nearest natural break. Wallpaper will be provided to replicate original finishes. Any wood trim (e.g., baseboard, crown molding, door/window casings) on wall or ceiling surfaces that are treated with new gypsum shouid be replaced with new trim and painted/stained to match remaining trim within the room. . Structural Issues: Any additional gypsum material added to the existing structure is contingent on a structural investigation by the design consultant before gypsum is installed. This is typically done at the pre-walk with the contractor cutting and patching any holes created to view the structure. Any deficiencies in the structure that suggest that the proposed wall/ceiling treatment should not be installed are to be discussed with the Program Manager. The Architect shall propose remedies to the structural deficiencies to allow the proposed treatments to be installed. The Architect should examine alternative treatments conferring with the Acoustical Consultant as necessary. Consideration is given to the nature and extent of the structural problem and the effect on the other proposed treatments should the ceiling treatments be deleted. Program policy regarding such situations dictates that any structural remedies that involve correcting the roof structure are beyond the scope of the program. Such conditions would need to be corrected by the Homeowner as pre-work for the proposed treatment to be installed. However, structural deficiencies that involve the ceiling structure can be corrected by the Program provided that the structural deficiencies were not created by the Homeowner due to either neglectful maintenance or poor construction practice in any additions or modifications to the original structure by the Homeowner. Each situation needs to be reviewed on a case-by-case basis. . Insulation: The program will be providing insulation as required to meet code in the case of newly installed walls or ceilings. The program will also install batt insulation in attics where none exists. . Soffit: Where necessary, the Program will provide new chases and soffits to enclose ductwork added as part of the air-conditioning system. Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual - Treatments Key West International Airport Revised December2000 1.11 Other program guidelines/policies that pertain to ceiling installations are listed below: . Ceiling Heights: Efforts are made by the program to maintain maximum practical ceiling heights at ceiling treatments proposed in rooms where: a. Existing ceiling heights are at or below the minimum code requirements, i.e., 7'-6" for typical habitable spaces; b. Proposed ceiling treatments would lower a ceiling below 8'-0"; or (c) where there are existing obstacles such as cabinets, transoms, window or door head casings that make it difficult to lower a ceiling. Where ceiling heights are at or below minimum code height requirements, there is an effort to install the ceiling treatment in a way that does not make the non-conforming condition worse, i.e., any lower than it already is. Sometimes where the. treatment involves lowering a ceiling by a matter of inches, the Architect can seek relief from the local building inspector on waving the height requirement. Since ceiling heights are generally not perceived as a life safety issue, a waiver is often given. . Non-conforming Electrical Wiring at Ceilings: Ceiling treatments including attic insulation cannot be installed where there is non-conforming electrical wiring that would need to be modified as a part of the ceiling installation process. Such conditions will be corrected by the Program. This requirement covers not only improper wiring, but also extends to upgrading any ceiling pull-chain fixtures to provide a switched fixture or a dedicated outlet for a lamp fixture. Non-conforming wiring that is observed, but does not need to be modified as part of the ceiling installation process, will be brought to the Program's attention by the Architect, in writing, so that the Program Manager can advise the Homeowner to correct the condition. Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual - Treatments Key West International Airport Revised December2000 1.12 1.5 PULL DOWN STAIRS, ATTIC/ROOF HATCHES, SKYLIGHTS: All of these assemblies represent a break in the roof-ceiling surface and are sound insulated as noise paths. . Pull Down Stairs: There are two methods of sound insulating Attic Pull-Down Stairs: one method involves sound insulating the stairs from above the attic; the other method involves sound insulating the stairs from below from the finish ceiling side. The acoustically preferred treatment is to treat the stairs from above; treating the stairs from below should only be done when it is not possible to treat from above. Exception to the preferred treatment will be developed on a case-by-case basis. Additionally, the program will replace pull-down stairs as part of the acoustical treatment if they are found to be in a deteriorated condition. All treatments from below require a new stair with heavy-duty springs. . Attic/RoofHatches -Most homes are equipped with an attic access panel if there is not a pull-down stair. Where these openings in the ceiling plane occur directly above living spaces, the opening will be treated with a program approved sound insulated panel if an adequate panel does not exist. All new and existing panels to remain will have weather-stripping applied to reduce noise infiltration. Where attic panels are located in Bedroom closets, the door to the closet may be replaced with a solid core door where applicable. . Skylights - The program will not replace skylights. The program will provide an interior glazing panel inside the well of the skylight to encapsulate a minimum 2" airspace. . Gable! Attic/Roof Vents: Gable and related attic vents are penetrations that provide a noise path. The severity of its impact to the habitable space shall be judged based on proximity to living space, ability to provide attic hatches percentage of vent to area of attic greater than 1 %, and presence of insulation. Where this condition occurs, a baffle will be added at the gable end or at a roof vent to create an indirect path to block the noise while allowing proper airflow, but only if the adding of 6 inch of fiber spun insulation is not possible. Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual - Treatments Key West International Airport Revised December2000 1.13 1.6 HEATING AND VENTILATION The strategy of the sound insulation treatments is to close off noise paths through the exterior envelope of the house. The net effect of the treatments is to tighten the exterior envelope. While this creates a quieter interior environment and improves the thermal performance of the structure, it also reduces the amount of air filtration. Under certain circumstances, this can affect mechanical appliances in the home that require combustion air. The Program policy is to provide air-conditioning to the home. Where the heating system is integral to the air system the program may provide a new system of heating and cooling under the following guidelines. 1.6.1 Combustion Air . Inspection and Assessment: During the existing con~tions survey, information is gathered by the Assessment Team regarding the size and type of appliances in the home that require combustion air. These appliances are typically gas, oil or propane dryers, water heaters, stoves/ranges, space heaters, boilers, compressors or furnaces. Calculations are then done by the Engineer to determine whether there is adequate volume and air infiltration to sustain the operation of the appliances. . Corrective Measures: Where there is insufficient volume to meet combustion air requirements, there are typically two corrective strategies: the first is to install interior vents or undercut doors that will connect volumes of interior spaces, the second strategy is to install a system of vents and ducts that can bring additional outside air to the appliance. Where there is insufficient air infiltration, the typical recommendation is to install one or more through- wall vents at a location specified by the mechanical engineer. The Program will undertake corrective measures that require installation of ductwork or electrical devices to control vents or louvers. Corrective measures that are wholly passive and are single item installations such as vents or louvers are more generally acceptable. Each situation is reviewed on a case-by- case basis. . Existing Deficiencies: The mechanical inspection sometimes reveals other conditions that mayor may not need to be remedied before treatments can be installed. Conditions that involve life safety such as leaky vent flues or proximity to combustible materials are brought to the Homeowner's attention in writing with a deadline for repair as Homeowner pre-work. Other more benign conditions are brought to the Homeowner's attention, not as pre-work, but as a matter of notification that a non-complying condition was observed and should be remedied. Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual - Treatments Key West International Airport Revised December2000 1.14 1.6.2 Existing Heating/V entilation Systems . Existing Humidifiers/Air Cleaners: Where existing heating systems are being replaced, the program will provide new humidifiers/air cleaners to replace existing units. . Duct Insulation: Supply and return ducts in unconditioned spaces such as crawl spaces and eaves shall be insulated according to engineered system and code requirements. . Existing Hot Water Base Board and Electric Baseboard Heating Systems: Program policy is to leave such systems in place and install an air-conditioning system. Where space exists to run ductwork, a ducted air-conditioning system separate from the heating system may be considered. . Deficient Existing AC Duct: Review need for new ducting on a case-by-case basis. The Program will install return and supply duct as needed to properly cool the home. Engineering calculations and design focus will be on reusing as much of the existing duct systems as possible. . In-Wall Space Heaters: Should be acoustically tested to determine if they represent a noise path; if determined to be such, remove and patch wall; otherwise, no action is required. Heaters with a full exterior louver are generally considered more of a noise path than gas heaters with a single vent pipe through the wall. Where such systems require removal, the program will provide an alternative heating system. . In-Wall Fans & Hoods: Treatment is required for fans where there is a direct line-of-sight path from interior to the exterior. Treatment shall then include in-filling the wall at the exterior and interior, and if desired by the Homeowner, installing a ductless range hood. Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual- Treatments Key West International Airport Revised December2000 1.15 1.6.3 Protocols for Heating Replacement . Age of System: Hot-air furnaces or heat pumps which are 10 years or older which form the basis for the cooling system shall be replaced as a program treatment. The intention is that the system has a 10-year life span to match the warranty on the other sound insulating products. Systems newer than ten years can be replaced if they are in poor condition as judged by the mechanical engineer or if they can not accept the addition of the air conditioning treatment. The program intention is to provide air-conditioning. If the existing furnace is less than 10 years old and can be modified for air-conditioning, the program will not replace it. . Capacity: Program policy is to provide the Homeowner with the equivalent of the BTU output existing in their current system. It is very important for the Assessing Engineers to establish the existing system output with as much aecuracy as possible. In addition to an established rule of thumb for sizing, existing conditions such as the home's construction, existing duct size, number of registers, etc shall be considered in sizing the desired output. . Gas Service: Noise insulation programs generally provide a gas-powered furnace and air- conditioning system, where efficient. If the house is not piped for gas, the program will install piping from the point of entry into the building to the new furnace. The Homeowner must have a gas line installed from the main line to their house prior to the Contractor's measurement walk-through. If the Homeowner cannot have a gas line installed to their residence, the program will install an electric furnace system. If propane is in use, the program will provide propane powered equipment where appropriate per engineering design and codes. . Efficiency: Provide 90% efficient furnace and condensing unit but where a 90% efficient system is inappropriate the Program will install an 80% efficient system. o Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual - Treatments Key West International Airport Revised December2000 1.16 1.6.4 Attic Ventilation . Addition of GWB to Ceiling: Roof ventilation conforming to applicable codes will be required where the program is adding gypsum wallboard to a previously permeable ceiling surface, e.g. 1/8" paneling or Celotex wood fiber tiles. The Architect shall investigate the roof for the potential to add standard ventilation treatments such as soffit buttons, mushroom vents, or gable end vents. The number of vents needed will be calculated by the Contractor as part of the shop drawing submittal. As long as the venting does not exceed 1 % of the floor area of the attic, and is not directly impacting a living area, no baffling will be necessary. . Whole House Fans: Whole house fans are a significant noise path and require treatment. The primary treatment is to install a cover from below. Since the program is designed to install an air-conditioning system, the fan can be evaluated by the Engineer for its continued usefulness. If the Homeowner consents and a new air supply system is part of the air- conditioning, the program will remove the fan and patch the ceiling. Where a cover from below is not possible or desirable to the Homeowner, the Architect shall review the possibility of constructing a cover from above similar to the stair cover. If the Homeowner requires continual use of the fan, a baffle configuration shall be designed by the Engineer specific to the rate of air-flow for the existing fan. . Attic Installed Equipment: Where mechanical equipment is installed in an attic, the engineer shall call for openings and support framing as needed to properly install the units. Equipment shall be insulated and vented as required to meet code and acoustical objectives. Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual - Treatments Key West International Airport Revised December2000 1.17 1.7 AIR CONDITIONING The program offers air conditioning as part of the treatment package. Program policy allows for the installation of central air-conditioning where it does not exist. Existing through-wall units that the Homeowner has installed in their home will be evaluated for removal. Existing window air- conditioners are required to be removed. . Existing Central Air-Conditioning: If a house has central air-conditioning, no further modifications are required unless the system is greater than 10 years old or judged to be insufficient to meet program criteria. If the home has an existing forced hot-air system that is less than 10 years old and in good condition, the program will provide a new evaporator coil and condenser to the existing furnace. Electrical panel/service upgrades as well as modifications to existing ductwork may also be required. The Program will provide supply runs to all habitable rooms, where possible. . New Central Air-Conditioning: If a house does not have an existing forced hot-air system which can be modified for cooling, the program will provide air-conditioning with ducting as required. This new system will require new ducting throughout the house and may require an electric service upgrade. The impact of any new duct chases to be added to the home needs to be explained to the Homeowner. . Split System Air-Conditioning: While it is the Program's preference to install central air, sometimes the construction of the residence prohibits duct-work. Split system or ductless units may be considered in those cases. Design of the system shall maximize coverage of the floor area without placing excessively sized equipment in one location. Multiple units may be specified to properly cool the home and should take advantage of open floor plans for maximum air movement. . Dual System Design: Some houses may have areas, which are unable to be ducted, while the majority of the house will accept a central air system. A combination of systems may be considered to properly cool the home. Such cases must be reviewed by the project team. Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual - Treatments Key West International Airport Revised December2000 1.18 1.8 PAINTING Given the residential context of the program, many of the treatment protocols utilize wood as a component of the products and/or installations. What follows is a summary of key treatments and product finishes. . Replacement Prime Doors and Frames: As previously noted in Section 1.3: Prime Doors, prime wood leaf doors come from the factory with no finish. The program will paint or stain 1-3/4" prime doors to a color of the Homeowner's choosing. Split finishes (i.e., paint on one face, stain on the other) are permitted. The finish of interior 1-3/8" prime doors and louver doors is also the program's responsibility. The wood sliding or atrium prime doors come with a factory applied vinyl cladding or flexicron coating on the exterior surface. Exterior finish color choices are white, sand and terratone. The interior face of the doors is bare untreated wood, which the program will paint or stain to a color of the Homeowner's choosing. Metal door products will come finished in either white, bronze or mill finish. . Exterior Siding and Trim: All new exterior siding and trim installed by the program is prime and finish painted/stained as work of the contract. Where thru-wall air conditioners have been removed and the wall in-filled, provide paint to match to the nearest natural break. Provide new aluminum or vinyl siding and match into the existing siding. . Interior Running and Standing Trim: Any new wood trim installed in the residences will be prime and finish painted/stained. The finish of new trim is the program's responsibility. This includes new casing, aprons, stools, side and head stops, etc. . Interior Walls and Ceilings: Any new wall and ceiling surface in a treated room will be prime and finish painted by the program. Where plaster returns have been replaced, the new plaster will be painted to match existing and a fmish coat applied to all affected walls to the nearest natural break. . AtticlRoof Hatches and Pull Down Stairs: Both these assemblies are primed and finish painted/stained. Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual - Treatments Key West International Airport Revised December2000 1.19 1.9 BRAKE METAL Residences having exterior trim surfaces surrounding windows and doors wrapped in brake metal will be affected by the window and door installation. The program provides new brake metal under the follow circumstances: . Where brake metal already exists around windows (or doors) and there are proposed treatment recommendations. . Where aluminum or vinyl siding with "J" channel comes up to the flange of the existing stonn windows (or doors) and the proposed treatment recommendations result in exposure of bare wood. . At residences where there is a mixture of windows and doors both with and without brake metal, all openings will get new brake metal if the Homeowner would like consistency. The intent of these guidelines is to provide a neat, clean finished window installation that leaves no wood trim exposed that was previously covered by brake metal or by stonn flanges. . Colors: The program does not represent that the replacement brake metal will exactly match the color of existing brake metal. However, the program will provide the closest possible color match available within the range of standard colors offered by the manufacturer of brake metal being used by the contractor. Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual - Treatments Key West International Airport Revised December2000 1.20 1.10 MISCELLANEOUS OPENINGSIP A THS . Fireplace Enclosures: Doors/enclosures not required as long as there is an existing damper. If there are no dampers present, then doors/enclosures are required. . Mail Chutes: Treatment not required if there is no direct line-of sight. . Through-wall Mail Slots: Through-wall mail slots are required to be patched and sealed. Openings cannot be allowed in the walls as this undermines the acoustical performance of the residence. . Roof Vents: Sound insulating baffle treatment not required if vents do not exceed area of opening required by code. See section 4.5.4 Attic Ventilation. . Whole House Fans: Treatment required. See section 4.5.4 Attic Ventilation. . In-Wall Fans & Hoods: Treatment is not required unless there is a direct line-of-sight path from interior to the exterior. Treatment shall then include in-filling the wall at the exterior and interior, and if desired by the Homeowner, installing a ductless range hood. Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual - Treatments Key West International Airport Revised December2000 1.21 1.11 TREATMENT ELIGIBLE SPACES Any space that is to be considered for treatment must be a 'year round' habitable space and meet code requirements for habitability and standard building construction requirements with respect to mechanical and electrical systems, foundation, wall, ceiling and roof materials and structure. Spaces that typically do not meet these requirements are as follows: . Basement Spaces are not eligible for treatment unless they meet previously stated criteria and code requirements for life/safety and habitability particularly with respect to: ventilation (natural or mechanical); emergency egress where there is a space used for sleeping purposes; heated, finished and enclosed from other surrounding uninhabitable spaces. . Porches or Seasonal Rooms are not eligible for full treatment (i.e. walls, ceilings, prime windows, doors and AC) unless they meet previously stated criteria particularly with respect to walls, ceiling and roof being constructed with standard building materials (i.e. standard framing, insulation and gypsum wallboard); have prime windows and doors; code complying mechanical and electrical systems; and, structurally adequate foundation systems. In the absence of meeting these criteria, porches or seasonal rooms may be eligible for storm window treatment if lack of such treatment would detract from the final finish appearance of the residence. . Converted Attics are not eligible for full treatment (i.e. walls, ceilings, prime windows, doors and AC) unless they meet previously stated criteria particularly with respect to walls, ceiling and roof being constructed with standard building materials (i.e. standard framing, insulation and gypsum wallboard). In the absence of meeting these criteria, converted attics may be eligible for window treatment if lack of such treatment would detract from the final finish appearance of the residence. . Second Dwelling Units must be confirmed with the Building Department in order for the house to proceed in the Program. The Homeowner will be required to provide confirmation of a home's legal status as a two-family in order to remain eligible for Program participation. Careful and complete documentation by the A&E Consultant of any spaces with habitability questions, and review of such with the Project Manager is anticipated as part of the normal design process. Jones Payne Architects & Planners, Inc. Program Policy & Procedures Manual- Treatments Key West International Airport Revised December2000 1.22