Section 22A. Lead Paint Risk Factor NONE-HIGH FLOOR INSULATION FOR CONVENTIONAL HOMES TABLE OF CONTENTS

Transcription

1 FLOOR INSULATION FOR CONVENTIONAL HOMES Lead Paint Risk Factor NONE-HIGH TABLE OF CONTENTS PART 1: INSTALLATION REQUIREMENTS FOR CONVENTIONAL HOMES... 1 FLOOR INSULATION REPAIR... 1 Not applicable to this measure CRAWLSPACE PREPARATION PRE-INSTALLATION - PREPARATION OF CRAWLSPACE SEALING... 1 FLOOR INSULATION INSTALLATION SQUARE FOOTAGE CALCULATION CRAWLSPACE VENTING VAPOR RETARDER/GROUND COVER INSULATION LOCATION AND COVERAGE PLACEMENT OF INSULATION KNOB-AND-TUBE WIRING ALL SUPPORTS AND ANCHORS WOOD LATH SUPPORTS WIRE SUPPORT WIRE SPAN AND ANCHOR POINTS WOVEN WIRE OR NETTING SUPPORT CRAWLSPACE ACCESS FROM CONDITIONED SPACE WATER PIPES IN CRAWLSPACE COVERED WATER VALVES WATER PIPE HEATERS UNDERFLOOR INSULATION, WHERE NO FOUNDATION WALL EXISTS HVAC DUCTS GAS APPLIANCES IN CRAWLSPACE FINISHED FLOOR CAVITIES (BLIND FILL) PIER CONSTRUCTION SUBFLOOR INSULATION WITH RIGID BARRIER... 7 CRAWLSPACE PERIMETER INSULATION INTERIOR CRITERIA VAPOR RETARDER FLEXIBLE INSULATION RIGID INSULATION INSTALLATION OF RIGID INSULATION BASEMENT WALL INSULATION... 8 PERIMETER INSULATION EXTERIOR INSTALLATION CRITERIA RIGID INSULATION PLACEMENT ATTACHMENT OF RIGID INSULATION... 9 PART 2: MOBILE HOME CRITERIA... 9 See CSD WIS Section 22-B (Floor/Undercarriage Insulation for Mobile Homes)... 9 PART 3: MULTI-FAMILY WHOLE BUILDING CRITERIA A-TOC TABLE OF CONTENTS

2 32. MULTI-FAMILY INSTALLATION REQUIREMENTS... 9 PART 4: MEASURE-SPECIFIC POST-INSTALLATION REQUIREMENTS QUALITY OF INSTALLATION CLEAN-UP CLIENT EDUCATION INSULATION CERTIFICATE A-TOC TABLE OF CONTENTS

3 FLOOR INSULATION FOR CONVENTIONAL HOMES PART 1: INSTALLATION REQUIREMENTS FOR CONVENTIONAL HOMES FLOOR INSULATION REPAIR Not applicable to this measure. CRAWLSPACE PREPARATION 1. PRE-INSTALLATION - PREPARATION OF CRAWLSPACE - The following conditions shall be corrected (by client, or by contractor when within the program scope) before the installation of floor insulation is allowed: Fuel leaks Electrical hazards Mold issues Plumbing leaks, both supply and waste lines Pest and termite infestation Structural defects Repair or replacement of HVAC appliance systems located in the crawlspace, when applicable. Note: Crawlspace repairs (sealing and installation of insulation) shall only be performed after HVAC work has been completed and inspected by the local jurisdiction. Correctable standing water: passive drains or sump pumps will be used to remove standing water Non-correctable standing water: Installation of floor insulation is not feasible. Debris Removal and Disposal: All vegetation and organic material, unnecessary material, and debris greater than 1 will be removed from the crawlspace (e.g., rake the crawl space) and disposed of according to type and local jurisdiction requirements. Note: If materials suspected to contain asbestos or lead content are present, dwelling shall be assessed in accordance with the CSD Asbestos Policy. If client arranges for hazardous material to be removed by a licensed abatement contractor in accordance with EPA regulations, installation of floor insulation may be feasible. 2. SEALING - Sealing of floor thermal bypasses shall be performed before floor insulation is installed. FLOOR INSULATION INSTALLATION 3. SQUARE FOOTAGE CALCULATION - Measurements Square footage is based on exterior measurements. Measurements of length and width are to be rounded off to the nearest foot; i.e., 12'5" = 12' (feet) and 12'-6" = 13' (feet). 4. CRAWLSPACE VENTING - Venting Requirement Crawlspace ventilation shall conform to local building code requirements and CSD WIS Section 21 (Attic and Crawlspace Ventilation). Required ventilation shall be installed before insulation is installed. 22A-1

4 5. VAPOR RETARDER/GROUND COVER - All Ground Cover Materials Vapor retarders shall be installed when required by the local jurisdiction. Installation of a vapor retarder is not required when ventilation is installed as a stand-alone measure. - Existing Vapor Retarder Existing undamaged ground cover acceptable if at least 4 mil thick and in good condition after insulation is installed. - Location When installation of a ground cover is required: - A Class I or Class II vapor retarder shall be installed over the earth in the crawlspace, with 100% coverage, when floor insulation is installed. Exception 1: Basements with exposed soil floor shall have ground cover over soil, unless vented and dry, or excluded by local code. Exception 2: A vapor retarder shall not be installed when crawlspace ventilation is installed as a stand-alone measure. - Installation of Vapor Retarder The ground cover shall be installed after all work in the crawlspace has been completed (after performing air sealing and insulation is installed). Material shall not obstruct any combustion air supply. Minimum 3" clearance required from heat producing devices. Joints shall be lapped 12" using reverse or upslope lapping technique. Seams will be sealed with a durable sealant, compatible with the retarder. The ground vapor retarder will not interfere with the established drainage pattern. Interior drainage collection points will be accessible from above and below the ground vapor retarder. Vapor retarder shall extend 6" up the foundation wall. Contact shall not be made with wood members. For wall to floor connection, the wall moisture barrier will be installed under the ground moisture barrier. Retarder shall be secured in place with brick, earth, or durable fasteners every 8' minimum. If tape is used to secure polyethylene: - Sheeting must first be wiped clean. - Tape must be capable of adhering to polyethylene. 22A-2

5 6. INSULATION LOCATION AND COVERAGE - R-Value R-value shall be determined in accordance with CSD WIS Appendix A (Material Specifications) and CSD Field Guide. - Materials Insulation shall be installed only between conditioned and unconditioned spaces. Insulation shall not be installed in floors over heated space. Coverage shall be complete with no gaps on sides or ends. 7. PLACEMENT OF INSULATION Insulation shall be in substantial contact with subfloor without gaps, voids, compressions, misalignments, or wind intrusions. If kraft-faced batts are used, they shall be installed with kraft facing to the subfloor. Insulation shall not obstruct combustion air supply openings or foundation vents. Minimum 3" clearance required between insulation and heat producing devices. 8. KNOB-AND-TUBE WIRING Insulation shall not be installed over knob-and-tube wiring unless the wiring is certified safe and proper overcurrent protection is in place (see CSD WIS Appendix F). 9. ALL SUPPORTS AND ANCHORS - Material Selection Materials shall be in conformance with the CSD WIS Appendix A (Materials Specifications). 10. WOOD LATH SUPPORTS - Flexible Insulation Lath shall be spaced 18" OC maximum. Lath shall be sized and spaced so insulation does not sag. Lath may be attached with galvanized nails or corrosion-resistant staples. 10% maximum compression of insulation. 11. WIRE SUPPORT - Flexible Insulation All Wire Supports - Wire shall be: Corrosion-resistant material. Minimum 20 gauge. - Maximum 10% compression of insulation. 22A-3

6 12. WIRE SPAN AND ANCHOR POINTS - Flexible Insulation Joists to 24" OC - Wire shall span twice in 18", with anchor points spaced maximum 18" apart. Joists 25" to 48" OC - Wire shall span twice in 12", with anchor points spaced maximum 12" apart. Joists 49" to 60" OC - Wire shall span four times between anchor points (crisscross pattern), with anchor points spaced maximum 12" apart. - Facing shall be stapled to subfloor. 13. WOVEN WIRE OR NETTING SUPPORT - Flexible Insulation Woven wire support shall be anchored to joist every 12". 10% maximum overall compression of insulation. Support shall not sag more than 1" per 24" of span in any direction. 22A-4

7 14. CRAWLSPACE ACCESS FROM CONDITIONED SPACE Access cover/door shall be insulated: - If horizontal, compliant with floor insulation level (R-19) - If vertical, compliant with wall insulation level (R-13). Access cover/door shall be weatherstripped. - Horizontal openings: Hollow vinyl tube or self-adhesive foam tape. - Vertical openings: Weatherstripping shall comply with CSD WIS Section 9 (Weatherstripping). 15. WATER PIPES IN CRAWLSPACE Pipes shall not be isolated from the heated side. - In locations without freezing temperatures, pipes may be surrounded with insulation. - In locations with freezing temperatures, insulation shall be placed between pipes and cold side. - Locations with freezing temperatures are those with winter design temperature listed at or below 32 F in the California Energy Commission Residential Manual, or per ASHRAE. 16. COVERED WATER VALVES Valve must be tagged if covered. 17. WATER PIPE HEATERS Installation of water pipe heaters is not allowed. 22A-5

8 18. UNDERFLOOR INSULATION, WHERE NO FOUNDATION WALL EXISTS If exposed to precipitation (i.e., rain, snow, etc.), do not insulate unless the exposure can be corrected within the scope of the weatherization program. If exposed to wind and animals: - Insulate with flexible mineral fiber or foil clad-foam board. - Support flexible mineral fiber with woven wire or minimum 70 perm breathable cover. - Exterior soffit material shall be installed and sealed. Recessed lights and other heat producing devices: - 3" clearance required. Air barrier (if required by local jurisdiction): - Air barrier will be installed between joists and sealed. - Air barrier will be placed to the most interior edge of the top plate of the wall below. Installation - Air barrier will be insulated between joists from top plate of the wall below to subfloor above. 19. HVAC DUCTS Ducts located within joist cavities shall be insulated in conformance with CSD WIS Section 19 (Duct Insulation). Vapor retarder, when present, shall be on the exterior of the duct insulation. 20. GAS APPLIANCES IN CRAWLSPACE Minimum 3" horizontal clearance from flue/vent pipe and draft hood. Minimum 12" vertical clearance above draft hood. 22A-6

9 21. FINISHED FLOOR CAVITIES (BLIND FILL) - Loose Fill Cavities shall be drilled and pressure-filled using a directional nozzle or fill tube. Holes shall be spaced for maximum 2' horizontal insulation travel beyond the injector. - HPD Clearance Minimum 3" clearance required for recessed lights, vent pipes, and other heat producing devices. When 3" clearance cannot be achieved, the cavity containing the HPD shall not be insulated. - Coverage and Finishing All portions of all fillable cavities shall be completely filled to required density as prescribed by insulation manufacturer. Holes shall be plugged and patched as prescribed in CSD WIS Section 23 (Wall Insulation). 22. PIER CONSTRUCTION SUBFLOOR INSULATION WITH RIGID BARRIER - Loose Fill Subfloor preparation - Sealing between house and crawlspace will be completed before insulating. Rigid Air Barrier - A rigid air barrier will be mechanically fastened to underside of floor assembly, providing 100% coverage of the floor assembly. - Seams and penetrations will be sealed. Installation - Loose fill insulation will be installed between air barrier and subfloor according to manufacturer specifications. - Insulation will be installed to prescribed R-value in CSD WIS Appendix A (Material Specifications). - Dense Pack - Dense pack insulation will be installed between air barrier and subfloor according to manufacturer specifications. CRAWLSPACE PERIMETER INSULATION INTERIOR 23. CRITERIA - Perimeter insulation shall be installed in conditioned basements and in unvented crawl spaces as an alternative to floor insulation. 24. VAPOR RETARDER - Install in accordance with Item 5. 22A-7

10 25. FLEXIBLE INSULATION - Installation Requirements Shall cover band and header joists. Shall extend 3' away from the walls on top of ground cover. Seams shall be continuously taped or stapled at intervals not to exceed 6". No gaps allowed between batts. Facing shall meet applicable code requirements for flame spread and smoke density. - Foundation Vents Vents shall not be blocked. Operable vents must exist, so they can be closed during adverse weather. 26. RIGID INSULATION - Installation Requirements Band and header joists shall be insulated. A minimum of one continuous horizontal bead of adhesive shall be installed on the foundation wall to block insect infestation. Foundation wall shall be cleaned before adhesive is applied. Mechanical fasteners, such as expansion bolts or suitable nails with washers, shall be used to permanently secure the insulation to the foundation wall. Foam insulation shall be a code-approved firerated material. 27. INSTALLATION OF RIGID INSULATION - Termite Inspection Gap Where termite presence exists, a 3 inspection gap will be maintained from the top of the insulation to the bottom of any wood. - Attachment Insulation will be attached with a durable connection equal to or better than manufacturer specifications, whichever is more durable. - Band Joist And Wood Foundation Walls A vapor-diffuse insulation shall be installed. Where termite presence exists, removable band joist insulation will be installed. In cold climates, insulation will be installed with a vapor barrier on the warm side of the insulation. (Note: Cold climates are those locations with winter design temperature listed at or below 32-degrees Fahrenheit in the Title 24 Residential Manual or per ASHRAE). 28. BASEMENT WALL INSULATION - No ground water leakage shall be present, for insulation to be feasible. - Air Barrier A continuous air barrier shall be installed on the warm side of the insulation. - Vapor Permeability When absorbent insulation materials are installed, assembly will remain vapor permeable to the interior in all climate zones.. 22A-8

11 PERIMETER INSULATION EXTERIOR Section 22A 29. INSTALLATION CRITERIA - Limitations Shall only be installed for slab-on-grade construction when proved cost effective (SIR of 1.0 or greater) and approved by CSD in advance of work. 30. RIGID INSULATION PLACEMENT - Installation Requirements Band and header joists shall be insulated. Insulation shall extend 12" below grade or below frost line, but not below footing. If footing is less than 12" below grade, insulation shall extend horizontally from footing to a total of 12" of insulation below grade. Only rigid polystyrene insulation is allowed. That portion extending above grade shall be covered. - Foundation Vents Shall not be blocked. Operable vents must exist. 31. ATTACHMENT OF RIGID INSULATION - Installation Requirements A minimum of one continuous horizontal bead of adhesive shall be installed on the foundation wall to block insect infestation. Foundation wall shall be cleaned before adhesive is applied. Mechanical fasteners, such as expansion bolts or suitable nails with washers, shall be used to permanently secure the insulation to the foundation wall. PART 2: MOBILE HOME CRITERIA See CSD WIS Section 22-B (Floor/Undercarriage Insulation for Mobile Homes). PART 3: MULTI-FAMILY WHOLE BUILDING CRITERIA 32. MULTI-FAMILY INSTALLATION REQUIREMENTS - General This measure shall only be installed when the whole building is being served. All measure installation for these projects must conform to the latest adopted version of the and the DOE Standard Work Specifications for Multi-Family Home Energy Upgrades, which is incorporated here by reference and available at: 22A-9

12 PART 4: MEASURE-SPECIFIC POST-INSTALLATION REQUIREMENTS 33. QUALITY OF INSTALLATION - Level Installation Completed floor insulation sections shall be confirmed to have an even level of insulation at the prescribed R-value in conformance with the CSD Field Guide and CSD WIS Appendix A (Material Specifications). Installation shall have no voids or un-insulated areas behind framing members. Once installed, insulation shall not be compressed or scattered to impact the efficiency of the insulation R-value. Clearance zone for HPDs and floor foundation ventilation shall be cleared of over-blown insulation. 34. CLEAN-UP - Required Practices When crawlspace access is indoors, the pathway from the entrance door to the access shall be protected with runners. When entry is through an access inside a closet, the clothing and other personal property must be removed or protected. All cutting of fiberglass batts and blankets shall occur outside the living space or inside the crawlspace. - Access from Inside Home All areas between an indoor access and the home entrance shall be vacuumed. The area between the home entrance and the insulation truck shall be cleaned (swept or vacuumed). - Access Outside the Living Space All areas between the access and the insulation truck shall be cleaned (swept or vacuumed). A HEPA vacuum is required when fiberglass insulation is installed, and should be used for all other types of insulation. 35. CLIENT EDUCATION - When floor insulation is feasible: Client shall be advised that all plastic vapor retarder (moisture barrier) is biodegradable and: 1) will have a life span much shorter than the home (approximately 5 years), and 2) it will need to be replaced to remain effective. Crawlspace Sign Requirement - A durable (10-year life expectancy), easily-seen sign (minimum 8 ½ x 11 ) shall be posted at all accesses to the crawlspace when floor insulation and/or a vapor retarder is installed. Crawlspace Sign Content - Those entering the crawlspace will be cautioned not to damage the air barrier, ground moisture barrier, insulation, and mechanical components specific to the crawlspace type. - Anyone entering the crawlspace will be alerted that immediate repairs are needed in case of damage. - Installer contact information will be included on the sign in case there are questions or needs for repairs. - Hazard Warning: Language prohibiting storage of hazardous and flammable materials shall be stated on the sign. 22A-10

13 36. INSULATION CERTIFICATE - Required Documentation Manufacturer s information, and total installed R-value, shall be documented in the posted Insulation Certificate (CSD 610 Form). In accordance with Title 24, when insulation is installed (ceiling, wall, or floor), completion of the insulation certificate (CSD 610 Form) shall be required and a copy provided to the client. The certificate shall be completed and signed by the contractor responsible for installing the insulation. The manufacturer, brand, R-value, etc. Of the insulation installed in the roof/ ceiling, walls, floor and slab edge are documented. The installer also verifies compliance with the applicable mandatory measures (i.e. Infiltration and exfiltration) for the building envelope. 22A-11

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