Weatherization Manual Policies and Procedures Supporting Documents for United States Department of Energy (doe) United States Department of Health and Human Services (hhs) Bonneville Power Administration



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  • CHAPTER 5 PROVIDING WEATHERIZATION SERVICES


  • Section 5.3 Air Sealing

  • Policy 5.3.1 Air Sealing



  • POLICY 5.3.1 AIR SEALING

    1. Policy

    1. Local agencies shall perform air sealing where it is determined by a weatherization audit to be effective based on one of the following considerations:

      1. Energy efficiency if the total cost is justified using an evaluation of cost-effectiveness where the Savings to Investment Ratio (SIR) is 1.0 or greater.

      2. Health

      3. Safety

      4. Building durability

    2. Air sealing locations

    1. Air seal the building envelope including the heating or cooling duct system, at the pressure boundary and align it with the thermal boundary.

    1. Priority air sealing

    1. Priority air sealing shall be performed, and shall include air sealing of all large holes, including obvious bypasses, chase ways, and gaps that exist between the unconditioned areas and the conditioned areas.

    1. Determining cost-effectiveness

    1. Each agency will establish a cost-effectiveness guideline. This guideline will reflect the cost to achieve a 100CFM50 reduction as a result of air sealing. Air sealing shall continue until the additional costs of air sealing cannot be justified in terms of the energy savings it will produce. A savings to investment ratio (SIR) of one or greater shall be used when determining the cost-effectiveness of air sealing. Documentation of the air sealing time and efforts must be present in the client file. After all air sealing in an attic/ceiling addressing health, safety and durability issues is complete, then air sealing should continue until it is determined that further work is not cost effective. Reference materials for establishing a cost effectiveness guideline can be found in Residential Energy by John Krigger, Appendix A-12, Air Sealing Economic Limits.

    1. Use of pressure diagnostics and blower door

    1. The Local Agency shall perform a pre- and post-retrofit blower door test on all homes. Blower-door guided air sealing shall be used to assist in determining appropriate air sealing measures. Pre- and post-blower door test results (CFM50) shall be recorded in the client file.

    1. Preferred installation method

    1. The preferred method for installing air sealing materials is from the attic side, not living space side, of ceilings and attics, from the inside surface of walls, and from the underside of floors.

    2. Allowable Costs

    3. Air sealing is an allowable cost under DOE, HHS, BPA, and MM funds. Air sealing must be included in the SIR calculation for all fund sources and in the DOE per home expenditure average. See Chapter 6, Allowable Costs, for allowable expenditures.

    4. Specific fund source limitations or allowances are as follows:

    5. BPA: Units must be electrically heated in BPA service territory.



    6. B. Procedure

    1. Programmatic

      1. Client files must include the following documentation:

        1. An Exhibit 5.S3A, Diagnostic Test Report.

        2. Paid invoices for materials, measures, repairs, or modifications.

        3. Verification the installed measure has an SIR of 1.0 or greater if it is based on energy efficiency.

        4. All necessary measure-specific justification.

      2. See Chapter 6, Allowable Costs.

    2. Required Installation Standards and Materials Specifications

    1. See Field Guide, Retrofitting Washington
    2. TOC

    3. CHAPTER 5 PROVIDING WEATHERIZATION SERVICES


    4. Section 5.4 Building Envelope

    5. Policy 5.4.1 General Insulation Requirements

    6. Policy 5.4.2 Attic Insulation

    7. Policy 5.4.3 Wall Insulation

    8. Policy 5.4.4 Floor Insulation

    9. Policy 5.4.5 Windows and Doors





    10. Effective Date: July 2017 Page 1 of 2

    11. Weatherization Policy

    12. See also:

    13. Exhibit 5.S5, ASTM E 84, Flame Spread and Smoke Development

    14. Policy 5.4.2, Attic Insulation

    15. Policy 5.4.4, Floor Insulation

    16. Replaces: Policy 5.4.1 - October 20, 2016 Policy 5.1.2.1, Certification of Insulation

    17. POLICY 5.4.1 GENERAL INSULATION REQUIREMENTS

    1. Insulation: Insulation must be installed in accordance with manufacturer specifications to prescribed R-values.

    2. Installation standard:

      1. Dense pack insulation must be installed as follows:

        1. Cellulose insulation used in an enclosed cavity must be installed at 3.5 pounds per cubic foot or greater density.

        2. Blown fiberglass, mineral fiber, rock and slag wool, or spray foam used in an enclosed cavity must be installed at or above the manufacturer’s recommended density to limit airflow that corresponds to an air permeance value of ≤ 3.5 cfm/sq ft at 50 Pascals, as measured using BPI-102 “Standard for Air Resistance of Thermal Insulation Used in Retrofit Cavity Applications – Material Specification” or ASTM C 522, E 283, or E 2178.

      1. Fiberglass batt insulation must be installed as follows:

        1. In contact with the sheathing with no voids or gaps.

        2. Insulation batts must not be overly compressed.

    1. Exceptions:

          1. For use in the Priority List or PL CALC for a deemed equivalent floor insulation to R-30 in a 2x10:



            1. Use a R-30HD in a 2x8 floor joist.

          1. For use in TREAT for a floor insulation alternative:

            1. Use a R-30 in a 2x8 floor joist for an effective R-value of 25, or

            2. Use a R-25 in a 2x8 floor joist for an effective R-value of 24.

    1. Wx Policy 5.4.1 General Insulation Requirements Page 2 of 2

        1. Insulation must be cut to fit each joist space.

        2. All ends must fit tight without overlapping.

        3. Insulation must fit tight against structural members, rim joist, foundation walls and pipes.

        4. Insulation in open cavities, such as knee walls, must be supported by stringing, housewrap, or other approved material.

    1. Vapor barrier: Any vapor barrier that is installed in the building envelope must be located on the warm side of the insulation.

    2. Potential human contact / Fire rating / Open Cavity:

      1. Fiberglass insulation installed that is subject to routine human contact must be covered with material having a flame spread index of 25 or less and smoke developed index of not greater than 450 when tested in accordance with ASTM E84-01 or UL 723, Exhibit 5.S5, ASTM E 84, Flame Spread and Smoke Development.

      2. Foam insulation flame spread index must be 75 or less and a smoke developed index of not greater than 450 when tested in the maximum thickness intended for use in accordance with ASTM E 84 or UL 723.

      3. Foam insulation must be separated from the interior of the building by an approved thermal barrier at minimum 1/2" gypsum or a material that is tested in accordance with the acceptance criteria of both the Temperature Transmission Fire Test and the Integrity Fire Test of NFPA 275

    1. Access: Access must be provided into attic spaces and crawl spaces. See Policy 5.4.2, Attic Insulation and Policy 5.4.4, Floor Insulation.

    1. Certificate of insulation: A certificate of insulation will be completed and posted as per Policy 5.1.2.1, Certification of Insulation.



    1. Effective Date: July 2016 Page 1 of 4

    2. Weatherization Policy

    3. See also:

    4. Variance #8 – SWS 2.0601.1c & d and 4.1001.2c

    5. Variance #9 – SWS 2.0602.2d

    6. Variance #12 – SWS 3.1001.9h, 3.1201.7h, and 3.12018h

    7. Variance #13 – SWS 4.1003.9a-c

    8. Variance #15 – SWS 5.3002.4a and 5.3002.13a

    9. Replaces: Policy 5.4.2 – July 2015 Variance #23 – SWS 7.8003.14b

    10. POLICY 5.4.2 Attic Insulation

    1. Insulate Attics/Ceilings: Local agencies must insulate Attics/Ceilings if the cost to insulate is justified using an evaluation of cost-effectiveness where the Savings to Investment Ratio (SIR) is 1or greater.

    2. Mark Insulation Depth: Local agencies must adequately mark insulation depth a minimum of every 300 square feet of attic area, with measurement beginning at the air barrier.

    3. Ceiling loading: The Local Agency is responsible for ensuring that the ceiling can bear the loads that will be imposed when insulation (new or additional) is installed.

    1. Variance #13: DOE granted a variance from SWS Section 4.1003.9a-c MH Fiberglass Blown Insulation for Flat, Bowed, or Vaulted Ceilings allowing: 1. MUST clear standing water from roof prior to insulating (only leaks repaired), 2. MAY install air tight (AT) dams around non IC rated fixtures (AT IC fixtures not required), 3. MAY insulate over the top of trusses (prevent heat loss & condensation).

    1. Recessed lighting fixtures: If insulation is installed, existing non IC-rated recessed lighting fixtures must be replaced with ENERGY STAR compliant or fixtures comparable in energy use and cost that are also:

      1. Replaced with airtight, Type IC-rated fixtures, and covered with insulation, or

      2. Replaced with a surface mounted fixtures and opening sealed.

    1. Variance #23: DOE granted a variance from SWS Section 7.8003.14b Fixture Replacement allowing: WA to install ENERGY STAR compliant or replacement lighting fixtures comparable in energy use and cost.

    2. Exceptions:

      1. Air sealed as approved by the authority having jurisdiction,or

      2. Separated with a minimum of three (3) inch clearance from insulation with a fire-rated (5/8” gyp, aluminum damming, or other fire rated material equivalent to ASTM E 84) airtight closure taller than the surrounding attic insulation. The top of the enclosure shall be left free of insulation.

    1. Wx Policy 5.4.2 Attic Insulation Page 2 of 4

    1. Doorbell transformers must remain readily accessible to service.

    2. Soffits and dropped ceilings: An airtight seal shall be provided around perimeter between light box and interior ceiling. All enclosure seams and penetrations shall be sealed. A sealed rigid barrier enclosure shall be installed in soffits with heat-producing, non IC-rated fixtures prior to installation of insulation to maintain a 3 inch clearance on all sides.

    3. Knob and tube wiring in ceilings/attics: Insulation may be installed over knob and tube wiring found in attics or ceilings when the following procedures are followed.

      1. Inspection

    1. The wiring shall be surveyed by a licensed electrical contractor who shall certify in writing that the wiring is in good condition with no evidence of improper overcurrent protection, conductor insulation failure or deterioration, and with no improper connections or splices. Repairs, alterations or extensions of or to the electrical system shall be inspected by an electrical inspector as defined in WAC 296-46B-394 Wiring methods and materials -- Concealed knob-and-tube wiring (http://apps.leg.wa.gov/WAC/default.aspx?cite=296-46B-394). A copy of the electrician's certification shall be present in the client file.

    2. Variance #8: DOE granted a variance from SWS Sections 2.0601.1c and d and 4.1001.2c Knob and Tube allowing: WA to cover K&T wiring with insulation if LA has licensed electrician inspection and written certification, overcurrent protection.

      1. Overcurrent protection

    1. All knob and tube wiring that is to be covered with insulation shall have overcurrent protection in compliance with the National Electrical Code, Table 310-16, 60C column. Overcurrent protection shall be either circuit breakers or Type S fuses. Type S fuse adaptors shall not accept a fuse of an ampacity greater than is permitted in the above-referenced National Electric Code.

      1. Insulation

    1. After inspection and any subsequent repairs and corrections are made, or over current protection installed, fiberglass or cellulose insulation may be installed. Loose or rolled thermal insulating materials may be installed over knob and tube wiring as long as the insulation meets the National Fire Protection Association (NFPA) 101 Life Safety Code, as identified with a flame spread factor of 25 or less as tested using ASTM E 84. See Exhibit 5.S5, ASTM E 84, Flame Spread and Smoke Development. Foam insulation is not allowed for use with knob and tube wiring. If repairs or overcurrent protection are not made or provided, then no insulation shall be installed

    2. Wx Policy 5.4.2 Attic Insulation Page 3 of 4

    3. in contact with the knob and tube wiring, and the owner of the building will be notified in writing of the areas needing repair, or circuits needing overcurrent protection.

    1. Wiring (other than knob and tube): Insulation may be installed over wiring (other than knob and tube wiring) found in attics or ceilings when the following procedures are followed.

      1. Wiring

    1. All visible wiring shall be inspected by the Local Agency to ensure that the covering is intact and that there is no non-conforming wiring, such as extension cords, speaker wiring, automotive wiring, etc. or wiring less than 14 gauge, that is integrated into the house electrical system in the attic.

      1. Splices and connections

    1. All open electrical junctions, splices, and connections shall be in UL approved junction boxes that have covers that are attached with screws.

      1. Electrical boxes

    1. All electrical boxes serviceable from the attic shall be flagged to be seen above the level of the insulation.

      1. Dams and Enclosures

    1. Insulation dams and enclosures shall be installed as required.

    2. Variance #9: DOE granted a variance from SWS Section 2.0602.2d Aluminum Wiring allowing: WA requires the safety inspection of the Aluminum wiring system prior to the start of work but not after work is completed.

    1. Attic Access: Access shall be provided into attic spaces wherever it is practical for a person to reasonably work. Access shall be from the dwelling interior. Attic access covers and doors from conditioned to unconditioned spaces (attics and crawlspaces) shall be tight fitting or weather-stripped to prevent air leakage. All installed attic access shall be easily movable, such as on hinges or screwed. No nails can be used to secure attic access covers.

    1. Exception: If no interior access is practical, access shall be provided through the exterior of the dwelling. Exterior access shall be sized to allow for entry into the attic. All installed attic access shall be easily movable, such as on hinges or screwed. Nails shall not be used to secure attic access covers.

    2. Wx Policy 5.4.2 Attic Insulation Page 4 of 4

    3. Variance #12: DOE granted a variance from SWS Section 3.1001.9h Sealing access Doors, 3.1201.7h, and 3.1201.8h Repair, Maintenance, and Weather Stripping of Doors allowing: Blower door testing with feel, smoke, or infrared cameras to locate any air leakage sites around doors, windows, and accesses.

    4. Variance #15: DOE granted a variance from SWS Sections 5.3002.4a and 5.3002.13a Attic Walkway allowing: WA requires access and the defined pathway insulated with batts, rather than loose fill insulation. But we do NOT require constructing a walkway and platform.



    5. Effective Date: July 2016 Page 1 of 4

    6. Weatherization Policy

    7. See also:

    8. Variance #12 – SWS 3.1001.9h-3.1201.7h-and-3.1201.8h

    9. Policy 9.9, Asbestos

    10. Replaces: Policy 5.4.3 - July 2015 Policy 9.8, Lead Based Paint

    11. POLICY 5.4.3 WALL INSULATION

    1. Walls shall be insulated if the cost to insulate is justified using an evaluation of cost-effectiveness where the Savings to Investment Ratio (SIR) is 1 or greater.

    1. Exceptions: If any of the following conditions exist, then the wall cavity should not be insulated:

      1. Knob and tube wiring: Wall cavities that contain knob and tube wiring that cannot be certified.

      2. Insulated cavity: Cavities that are fully insulated.

      3. Cavities containing ducts/heaters: Any part of the cavity that is used as, or contains, an HVAC duct, contains a gas wall furnace, or contains an electric wall heater or other heat-producing device.

      4. Uninsulated soffit next to cavity: Cavity is open to an uninsulated soffit with a recessed light fixture or other heat-producing device that cannot be properly dammed.

      5. Cavities next to fireplace or chimney: Cavity is next to a masonry fireplace or chimney with less than three-inch clearance between cellulose and masonry.

      6. Cavity next to pocket door: Wall cavity is connected to an unprotected pocket door cavity.

      7. Repairs needed: Interior or exterior repair is needed and will not be performed as part of the weatherization package of the dwelling, water leaks are present, or substandard interior or exterior sheathing is present.

      8. Solid walls: Walls are solid masonry, concrete, concrete block, wood, or adobe.

    1. Timing of wall insulation: Wall insulation shall be installed after the following activities have taken place:

      1. Knob and tube wiring inspection.

    1. Wx Policy 5.4.3 Wall Insulation Page 2 of 4

      1. Minor electrical repairs in walls done by weatherization program.

      2. Required damming and/or blocking is installed.

    1. Dense pack wall insulation: All closed wall cavities that can be insulated by dense packing, shall be insulated with a loose fill insulation product designed specifically for dense pack applications.

    1. Exceptions:

    1. If the home's pre-insulation cfm50 shows high building tightness, the wall cavities do not have to be insulated using the dense pack method.

      1. On a project-by-project basis, products other than cellulose may be used, with reasons documented in client file.

      2. If one or more sides of the wall cavity are formed by concrete or masonry, the wall cavities do not have to be insulated using the dense pack method, or

      3. Other situations exist that are documented and approved in advance by Commerce.

    1. Variance #12: DOE granted a variance from SWS Section 3.1001.9h Sealing access Doors, 3.1201.7h, and 3.1201.8h Repair, Maintenance, and Weather Stripping of Doors allowing: Blower door testing with feel, smoke, or infrared cameras to locate any air leakage sites around doors, windows, and accesses.

    1. Dense pack walls shall be insulated as follows:

      1. Fill tube method:

    1. Insulation will be installed using the fill-tube method.

      1. Wall Blow Authorization - Interior/exterior installation

    1. Contractors shall get a signed authorization prior to drilling from the homeowner or landlord allowing the contractor to drill holes in the home. Dense pack insulation may be installed from the exterior or interior.

      1. Water column (WC) pressure

    1. Insulation blowing machines shall be tested and perform at a minimum of 80 inches WC on the date of installation. This measurement shall be recorded on the certificate of insulation.

    2. Wx Policy 5.4.3 Wall Insulation Page 3 of 4

      1. Balloon-framed walls

    1. Walls that do not have a top and/or bottom plate (balloon-framed) shall have stops installed in the top and/or bottom of the cavity before insulating. The stops shall be installed in a manner that will withstand dense-pack insulation installation.

    1. Treatment of interior and exterior surfaces: The following procedures should be followed when treating exterior or interior surfaces for insulation purposes.

      1. Exterior and interior siding shall be inspected prior to any work.

        1. Asbestos: Siding that may contain asbestos shall be deferred, presumed to contain asbestos, or tested. Surfaces that either test positive for asbestos or are presumed asbestos, shall not be disturbed unless work is performed by a trained and licensed asbestos professional and work follows procedures in Policy 9.9, Asbestos.

        2. Lead based paint: Siding surfaces that may be coated with lead based paint shall be tested or presumed to be coated with lead based paint. For surfaces that either test positive for lead or are presumed lead, work shall follow procedures in
          Policy 9.8, Lead Based Paint.

      2. Removing exterior siding

    1. Exterior siding shall be removed or lifted to gain access to the exterior wall for drilling. Siding shall be replaced after insulation is installed. Any siding that is damaged shall be repaired or replaced with matching siding that is primed and painted to match existing siding.

    2. Exception: Drilling exterior siding-Exterior siding not containing asbestos that cannot be removed or lifted before drilling walls may be drilled through with the owner's permission. Holes shall be drilled in a level line, and all holes will be filled with a tight-fitting, wooden plug that is installed using an exterior grade, non-silicone-based adhesive, and then filled and smoothed with exterior-grade spackle, textured to match existing surface(s), allowed to cure per manufacturer's specifications, primed, and painted to match existing siding.

    1. Cavities containing chimney/flue: A cavity containing a metal chimney or flue without a solid barrier and a three-inch clearance zone shall not be blown with insulation.

    1. Wx Policy 5.4.3 Wall Insulation Page 4 of 4

    2. Allowable Costs

    3. Wall insulation is an allowable cost under DOE, HHS, BPA and MM funds. The measure must be included in the SIR calculation for all fund sources and in the DOE per home expenditure average. See Chapter 6, Allowable Costs, for allowable expenditures.

    4. Specific fund source limitations or allowances are as follows:

    5. BPA: Units must be electrically heated in BPA service territory.

    6. B. Procedure

    1. Programmatic

      1. Client files must include the following documentation:

        1. Copy of the certificate of insulation.

        2. Verification the installed measure has an SIR of 1.0 or greater.

        3. All necessary measure-specific documentation.

      2. Local agencies must give the homeowner the original certificate of insulation and post a copy in the attic or crawl space of the dwelling unit as appropriate.

      3. See Exhibit 5.1A(4), Priority Lists.

      4. See Section 5.1.2.1, Certification of Insulation.

      5. See Exhibit 5.1.8A, Certificate of Insulation.

      6. See Chapter 6, Allowable Costs.

    2. Required Installation Standards and Materials Specifications

    1. See Field Guide, Retrofitting Washington



    2. Effective Date: July 2016 Page 1 of 7

    3. Weatherization Policy

    4. See also:

    5. Exhibit 5.4.4, Floor Support Matrix

    6. Variance#6 – SWS 2.0401.2a

    7. Variance#10 – SWS 2.0701.1b

    8. Variance #12 – SWS 3.1001.9h, 3.1201.7h, and 3.12018h

    9. Replaces: 5.4.4- July 2015 Variance #14 – SWS 4.1302.1b

    10. POLICY 5.4.4 FLOOR INSULATION

    1. Insulating Floors for Energy Efficiency: Floors over unconditioned crawlspaces and basements must be insulated if the cost to insulate is justified using an evaluation of cost-effectiveness where the Savings to Investment Ratio (SIR) is 1.0 or greater.

    1. Exceptions:

      1. Work in areas with less than 18-inch clearance may be waived.

      2. Floor contains knob and tube wiring that cannot be certified safe by a licensed electrician or inspector as defined in RCW 19.28.070.

      3. There is sewage waste on the ground, or any other condition is present that poses a health or safety hazard that cannot be corrected with available repair funds.

      4. The sub-floor, floor or structural members are wet, rotten or unsound and the problem cannot be corrected with available repair funds.

      5. Insect or rodent infestation is present that cannot be eliminated prior to insulating.

      6. Extensive debris or household goods or personal belongings are present.

    1. Insulation support systems:

      1. Floor Support Matrix:

    1. The floor support matrix must be used to determine insulation support systems. Exhibit 5.4.4, Floor Support Matrix

      1. Wire Hanger Method Prohibited:

    1. The use of wire hangers or “tiger teeth” is not considered an acceptable method of support for underfloor insulation.

    2. Wx Policy 5.4.4 Floor Insulation Page 2 of 7

      1. Alternative insulation and methods of support for underfloor insulation:

    1. Other insulation or support methods may be acceptable. They must be installed according to the manufacturer's recommendations and meet the SIR of 1.0 or greater. The Local Agency must notify Commerce field monitor prior to installation.

    1. Ground cover: Ground cover moisture barrier must be installed in accordance with the following:

      1. Must be installed in a crawlspace when no ground cover exists or when an existing ground cover has been extensively damaged.

      2. All wood or other cellulose fiber-based debris, where practical, must be removed before new ground cover is put in place.

      3. The ground cover must be 6 mil black polyethylene, or its equivalent in perm‑rating, strength, and resistance to soil-chemical degradation.

      4. All joints must be lapped a minimum of 12 inches.

      5. The poly cover must extend at least 6 inches up the foundation wall or pier blocks, but must not contact any wood members.

      6. New ground cover may be installed over existing ground cover that is deteriorated or incomplete.

      7. When existing ground cover is clear it must be covered with black.

    1. Exception: When underfloor insulation is installed over an unconditioned basement and the basement has no exposed soil (has a concrete floor and walls), ground cover is not required.

      1. Ground moisture barrier will be fastened to ground with durable fasteners or ballast(s) to keep it in place.

    1. Crawlspace access

      1. All crawlspaces must have an access. The minimum access opening size must be
        18 x 24 inches.

    1. Exception: Smaller access is allowable when dictated by existing framing.

    2. Wx Policy 5.4.4 Floor Insulation Page 3 of 7

      1. Exterior access

    1. Exterior access to the crawlspace must have a cover or door that fills the opening, is tight fitting, and can be securely attached using hand-operable mechanical fasteners. Hand tightening fasteners, butterfly clips, or screws are acceptable. Nails must not be used to secure access covers to framing. Cover and framing material exposed to weather, or in contact with soil or concrete, must be pressure treated or cedar. Other types of wood may be used if they are primed and painted with exterior grade paint. Nails, screws, fasteners or other hardware used must be made of galvanized metal, stainless steel, or similar corrosion resistant material.

    2. Recommendation: Cover crawlspace access wells with a shed roof type cover where bulk moisture is an issue. Construct the cover to conform to well dimensions. Include appropriate roofing material, prime or paint, or use treated plywood. Install handles for ease of removal. Do not install vents.

    3. Variance #10: DOE granted a variance from SWS Section 2.0701.1b Crawlspace access lock allowing: WA requires secure hand-operable mechanical fasteners, NOT a crawlspace access lock.

      1. Interior access

    1. Interior access to the crawlspace must have a cover or door that fills the opening and is reasonably tight fitting. Horizontal access covers must provide structural support equivalent to that of ¾ inch plywood. Access covers adjacent to a conditioned space must be insulated to a minimum of R-19 for horizontal openings and to a minimum of R-11 for vertical openings. The insulation must be permanently attached to access covers. Interior access covers must be weather-stripped.

    2. Variance #12: DOE granted a variance from SWS Sections 3.1001.9h Sealing access Doors, 3.1201.7h, and 3.1201.8h Repair, Maintenance, and Weather Stripping of Doors allowing: Blower door testing with feel, smoke, or infrared cameras to locate any air leakage sites around doors, windows, and accesses.

    1. Installation of passive ventilation: Installation of passive ventilation is allowable. The installation of additional ventilation is not required. If ventilation is installed, the code minimum must not be exceeded.

      1. Closeable vents

    1. Closeable vents are allowable.

      1. Vent opening location

    1. New vent openings must not be located within 12 inches of existing water pipes.

    2. Wx Policy 5.4.4 Floor Insulation Page 4 of 7

      1. Vent screening and framing

    1. All new and existing vents must be screened with ¼ inch corrosion resistant wire mesh, secured on all four sides, and trimmed so that no exposed edges of the wire mesh are showing from the outside. Expanded metal covers may be used. Wood framing in contact with concrete or ground must be pressure treated or cedar.

    2. Variance #6: DOE granted a variance from SWS Section 2.0401.2a Vented Crawlspace venting allowing: WA allows but does not require additional crawlspace ventilation to be installed.

    1. Sealed crawlspace: Converting a crawlspace with ventilation openings to a sealed crawlspace or “unvented crawlspace” is not allowed.

    1. Exception: Prior to beginning work a local agency must provide Commerce with evidence this alteration meets all of the following:

    1. Allowed by the local authority having jurisdiction (i.e. building department),

    2. Meets all applicable codes, and

    3. SIR of 1 or greater, other than allowable Health and Safety components.

    1. Combustion appliances in sealed crawlspaces: Combustion appliances must not be located in sealed crawlspaces.

    1. Exception: Direct vent, sealed combustion appliances with powered exhaust may be located in a sealed crawlspace.

    1. Unconditioned basement/Crawlspace combination:

    1. Unconditioned basement will be separated from a vented crawl space with a continuous air barrier and ground moisture barrier.

    2. Unconditioned basement will be treated as an extension of a closed crawl space.

    1. Conditioned basement/Crawlspace combination:

    1. Conditioned basement will be separated from a vented crawl space with a continuous air barrier, ground moisture barrier, and thermal boundary.

    2. Conditioned basement will be separated from a closed crawl space with a continuous air barrier and ground moisture barrier.

    1. Rim joist area: Rim Joist areas must be air sealed and insulated to R-11 or the highest level practical

    1. Wx Policy 5.4.4 Floor Insulation Page 5 of 7

    1. Exterior perimeter insulation: When exterior perimeter insulation is installed the Local Agency or Subcontractor must follow the specifications detailed below.

    1. Minimum R-Value for walls

    1. Insulation installed must have a minimum thermal resistance of R-10.

    1. Insulation installation

    1. Insulation must be installed from the bottom edge of the siding to a depth equal to the local "frost line" (as determined from local building or water utility officials) or two feet below grade, whichever is greater.

    2. Exception: Insulation must not be installed, nor excavation take place, below the level of any foundation footing.

    1. Excavation in preparation for insulation

    1. Prior to any excavation, the Local Agency or Subcontractor must reach an agreement with the client regarding protection or removal and replacement of any plants or other items which will be disturbed and damaged by the excavation. Any required excavations must be promptly backfilled after work is completed, and all plants or other items replaced in their original locations, unless released, in writing, from this obligation by the client.

    1. Utility locating

    1. The Contractor/installer must be responsible to locate, protect, and if damaged, repair any underground cables, pipes, utility lines or other obstructions during excavation.

    1. Surface preparation and attachment of insulation

    1. The foundation surface must be cleaned and prepared in accordance with the insulation manufacturer’s recommendation. Insulation must be attached to the foundation according to manufacturer’s specifications.

    1. Protection and flashing of insulation

    1. Insulation material must be protected and flashed to prevent water intrusion, rated for ground contact where required, and be acceptable to the owner. Above grade, the insulation must be covered with a suitable coating that matches adjacent walls (or previous foundation surface) in color and general surface appearance.

    2. Wx Policy 5.4.4 Floor Insulation Page 6 of 7

    1. Interior perimeter insulation: When interior perimeter insulation is installed the Contractor/Installer must follow the specifications as detailed below.

    1. Minimum R-Value

    1. Insulation installed in existing unvented crawlspaces must fill existing cavity or have a minimum thermal resistance of R-10. Building alterations, including converted a vented crawlspace into an unvented crawlspace, must meet requirements of section 8.6 Sealed Crawlspaces and be insulated to R 21.

    1. Insulation installation

    1. Insulation must extend from the bottom surface of the subfloor to the top of the below-grade floor/ground and be installed to all manufacturer’s specifications.

    1. Cantilevered floors: Cantilevered floors must be insulated using one of the following methods.

    1. Insulate cantilever open through rim

    1. When the floor joists extend beyond the foundation wall and the rim area is open, extend the insulation batt into the cantilevered area from the crawlspace. The thickness of the batt insulation must be thick enough to satisfy the requirement that insulation be in substantial contact with the underfloor. Air seal penetrations through sheathing or sub floor.

    1. Insulate cantilever open under floor

    1. Installer/Contractor must install insulation batt that is the full thickness of the floor joist from the exterior. A cover of 3/8 inch exterior grade sheathing or similar material must protect the insulation installed. If subjected to intermittent moisture (i.e. splashback, etc.), wood sheathing must be primed on all exposed sides or pressure treated plywood used. Air seal penetrations through sheathing or sub floor.

    1. Insulate cantilever no access

    1. Installer/Contractor must drill through existing interior or exterior cover, blow insulation into all joist cavities until full, plug holes using plugs and glue recommended for the surfaces being glued. Fiberglass insulation must be blown at a density of 1.5 pounds per cubic foot and cellulose insulation must be blown at a density of 3.5 pounds per cubic foot. Air seal penetrations through sheathing or sub floor.

    2. Wx Policy 5.4.4 Floor Insulation Page 7 of 7

    1. Floor over attached garage:

    1. No access

    1. Installer/Contractor must drill through existing interior or exterior cover, blow insulation into all joist cavities until full, plug holes using plugs and glue recommended for the surfaces being glued. Cellulose insulation must be blown at a density of 3.5 pounds per cubic foot. If the ceiling being drilled for access is drywall or plaster, the holes must be plugged and skim coated with joint compound ready for light sand.

    1. Open joists

    1. Underfloor insulation installed in open floor joists over a garage must be covered with material having a flame spread index of 25 or less, and a smoke developed index of not greater than 450 when tested in accordance with ASTM E84-01. See Exhibit 5.S5, ASTM E 84, Flame Spread and Smoke Development.

    2. Variance #14: DOE granted a variance from SWS Section 4.1302.1b Waste line Slope allowing: WA does NOT require alteration to existing functional systems such as revising waste line slopes to meet the required ¼” per foot prior to insulating the floor. Waste lines are only repaired or replaced when leaking, disconnected, or clogged.



    3. Effective Date: July 2016 Page 1 of 6

    4. Weatherization Policy

    5. See also:

    6. Variance #12 – SWS 3.1001.9h-3.1201.7h-and-3.1201.8h

    7. Policy 9.8, Lead Based Paint

    8. http://www.nfrc.org/#tabs-nfrclabels|0

    9. Replaces: Policy 5.4.5 – July 2015 Exhibit 5.S10: Standards for Weatherization Materials.

    10. POLICY 5.4.5 WINDOWS AND DOORS

    1. Local agencies may repair or replace exterior windows and doors when the cost can be justified for any of the following reasons:

      1. Energy efficiency

    1. The investment of Commerce administered weatherization funds (DOE, HHS, BPA, and MM) is justified using an evaluation of cost-effectiveness where the Savings to Investment Ratio (SIR) is 1.0 or greater. For DOE funding, this is the only allowable option window or door repair or replacement. (See Allowable Costs below)

      1. Health and safety

    1. The condition is compromising the health and safety of the dwelling unit occupants. If the cost to replace windows and doors is less than the cost to repair, then they shall be replaced.

      1. Security

    1. The condition is compromising the security of the dwelling unit occupants. If the cost to replace windows and doors is less than the cost to repair or replace components that will reasonably ensure security, then they shall be replaced.

      1. Durability

    1. For durability reasons if any components have failed or are deteriorated and they have compromised the structural integrity of the fenestration or of the surronding framing. If the cost to replace windows and doors is less than the cost to repair, then they shall be replaced.

      1. Leveraged funds (sources other than DOE, HHS, BPA, and MM) are available that will cover at least 75 percent of the cost of the windows and doors and their installation.

    1. Examples of leveraged funds are property owner contributions, approved utility contributions, or HRRP funded measures.

    2. Wx Policy 5.4.5 Windows and Doors Page 2 of 6

      1. Client comfort (window replacement only)

    1. Specific windows that effect client comfort may be replaced. Written justification of need for each window must be in the client file. No more than two (2) windows may be replaced in a home for client comfort reasons.

      1. Jalousie windows in mobile or site-built homes may be replaced to bring air leakage down to the air sealing target after all other blower-door directed air sealing has been done. Do not automatically replace windows in bedrooms where the leakage around the window may be needed to provide proper ventilation.

    1. Local agencies may split the cost for jalousie window replacement between air leakage reduction and an increase in thermal efficiency when running the calculations through TREAT.

    2. Variance #12: DOE granted a variance from SWS Sections 3.1001.9h Sealing access Doors, 3.1201.7h, and 3.1201.8h Repair, Maintenance, and Weather Stripping of Doors allowing: Blower door testing with feel, smoke, or infrared cameras to locate any air leakage sites around doors, windows, and accesses.

    1. Owner contributions: Local agencies shall make an attempt to secure owner contributions if window and door repair and replacement are for rental units.

    2. Lead based paint: The Local Agency shall address painted window or door components in houses built before 1978 using lead safe work practices unless testing indicates no lead based paint is present. See Policy 9.8, Lead Based Paint

    3. Replacement windows: Replacement windows shall have a U-factor rating of 0.30 or less and an air leakage rating of less than 0.3 cfm/sq.ft. An area weighted U-factor calculation may be used to demonstrate compliance. The replacement window shall have a label from the National Fenestration Rating Council (http://www.nfrc.org/#tabs-nfrclabels|0) that indicates the U-factor rating, the air leakage rating, the appropriate structural performance rating for the geographical area where the window is installed, and the appropriate solar heat gain coefficient (SHGC) for cooling climates.

    4. Replacement doors: Replacement doors shall be metal, insulated, and match the style of the existing doors where practical, and shall be hinged. If a new exterior door and jamb is being installed, the door shall have three hinges. All exterior door replacements shall be exterior grade. All replacement doors shall have an insulated core with a minimum R-6 insulation value.

    1. Exception: Wood, fiberglass, or composite doors are allowable if a metal door cannot be used. Wood doors shall be solid core. Veneers on wood doors shall be a minimum of 1/8 inch thick hardwood.

    2. Wx Policy 5.4.5 Windows and Doors Page 3 of 6

      1. Window and Door Photo documentation

    1. Both a dated electronic or printed "before" photo and written justification that clearly identifies the physical reason the window or door needs replacement shall be retained. The photo documentation or a reference to its location shall be kept in the client file.

      1. Window Screens

    1. All replacement windows that are openable shall have a removable insect screen.

      1. Window and Door Exterior and interior trim

    1. Trim shall be installed in a workmanlike manner and shall match the existing trim as much as is reasonably practical. Existing or new trim shall have all nails set and holes filled with an exterior grade filler. Exterior trim, for replacement windows, doors, and doorframes whether existing or new, shall have any bare wood surfaces primed with an exterior grade primer.

    2. Exception: If cedar trim is used, then no primer or sealer is required.

    1. Storm windows: A storm window may only be installed over a prime window that is structurally sound. The prime window shall be free of decay, broken windowpanes, worn or damaged rollers, missing, deteriorated or broken glazing, and broken sashes. The Local Agency shall evaluate the costs to replace a window unit with the costs associated with repairing a prime window and installing a storm window to ensure that the most cost-effective treatment is applied.

      1. Operable storm windows

    1. Operable storm windows shall be installed over existing operable prime windows, and the storm window shall not interfere with the operation of the prime window. If the operation of the prime window is impeded by paint buildup, mechanical fasteners, or other reasons, a storm window can be installed if the window is restored to an operating condition or if the Local Agency and homeowner agree in writing that the non-opening window is not required for egress or ventilation.

      1. Storm window removal

    1. All storm window installations shall provide an easy method of removing the storm sashes so that both the storm and prime windows can be washed.

      1. Jalousie prime windows

    1. Jalousie windows or other window types with a glass-to-glass contact cannot be weatherized using a storm window. Jalousie windows may be replaced.

    2. Wx Policy 5.4.5 Windows and Doors Page 4 of 6

    1. Safety glass: Safety glass shall be used in replacement window units or replacement glazing in locations where required by building codes and areas identified in the following sections.

      1. Sidelights

    1. When sidelight windows are replaced or repaired, safety glass is required when all of the following conditions are met:

    1. The glazed panel is within 12 inches of the door opening.

    2. The glazed panel is within 60 vertical inches of the floor.

    3. The window is in the same plane as the door when the door is closed.

      1. Other safety glass locations

    1. Safety glass shall be installed when all of these conditions are met:

    1. A glazed panel is greater than 9 square feet when measured from the inside of the sashes.

    2. The lowest edge of a glazed panel is less than 18 inches above a walking surface.

    3. There is a walking surface within 36 horizontal inches of a glazed panel.

      1. Shower and tub safety glass requirements

    1. Safety glass is required in shower and bathtub enclosures for exterior windows that are less than 60 inches above the floor of the enclosure.

      1. Safety glass requirements

    1. Safety glass shall conform to the Safety Glazing Certification Council (SGCC) labeling requirements. Installed safety glass shall have a permanently affixed manufacturer's label or etching.

    1. Replacement glazing Replacement glazing shall meet the specifications found in Exhibit 5.S10, Standards for Weatherization Materials.

    2. Obscure glass: Obscure glass shall be installed in windows where privacy is important. The Local Agency shall make the owner aware of locations where obscure glass is to be installed.

    3. Replacement door jambs: Replacement doorjambs shall have a width that is no greater than the finished wall thickness, and not less than ¼ inch of the finished wall thickness.

    1. Wx Policy 5.4.5 Windows and Doors Page 5 of 6

    1. Door finishes: Replacement wood doors will be primed and painted or sealed on both sides and on all four edges with exterior grade paint. Metal doors shall have a factory primer.

    2. Locksets and deadbolts: New replacement doors shall have a new lockset and deadbolt installed. The lockset and deadbolt shall be keyed alike. The Local Agency will provide two keys to the owner or occupant of the dwelling unit. When multiple locksets are installed in the same dwelling unit they shall have matching keys.

    3. Other attached items: Address numbers that were present on the existing front door or trim shall be reinstalled on the new door. Peepholes shall be installed on solid doors and shall be no more than 60" from the bottom of the door. If an existing door had a mail slot or mechanical doorbell, the Local Agency shall provide alternatives that do not require penetration of the door.



    1. Allowable Costs

    2. Window and Door repair and replacement are allowable costs under DOE, HHS, BPA, and MM funds.

    3. Unless health and safety related, repair and replacement must be included in the SIR calculation for all fund sources and in the DOE per home expenditure average (building cost calculation). See Chapter 6, Allowable Costs and Exhibit 6, Fund Matrix for allowable expenditures.

    4. Specific fund source limitations or allowances are as follows:

    5. DOE: Window or Door replacement, repair, or installation is not an allowable health and safety cost but may be allowed as an incidental repair or an efficiency measure if justified using an evaluation of cost-effectiveness where the Savings to Investment Ratio (SIR) is 1.0 or greater.

    6. BPA: Units must be electrically heated in BPA service territory.

    7. Wx Policy 5.4.5 Windows and Doors Page 6 of 6



    8. B. Procedure

    1. Programmatic

      1. Client files must include or be supported by the following documentation:

        1. Verification installed measure has an SIR of 1.0 or greater if repair or replacement is based on energy efficiency.

        2. Electronic or printed photos of existing windows and doors and written justification if repair or replacement is for health and safety, security, and/or durability.

        3. Proof of leveraging of at least 75 percent of material and labor costs from other funds, when leveraged funds are the reason for window replacement.

        4. A statement from the client if window is replaced for client comfort.

        5. If a jalousie window replacement, blower door test results documenting the effect of replacement after air sealing.

        6. All necessary measure-specific justification.

      2. See Chapter 6, Allowable Costs.

    2. Required Installation Standards and Materials Specifications

    1. See Field Guide, Retrofitting Washington


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