Division 7 Ebook Page 405 Fiberglass, Exterior Wall, 07 21 16

EnergyComplete Thermal Insulation 3.3 INSTALLATION OF FOAM SEALANT A. Foam sealant in accordance with manufacturer's instruction, including compliance with instructions for safety, preparation, and application of products. Apply continuously and evenly to joints in the following conditions: 1. At penetrations between conditioned and unconditioned spaces. 2. At interface between the sheathing and stud where a sheathing seam is known to exist. 3. At the interface between windows/doors and the framed opening. 4. On the face of all top plates of exterior walls. 5. On the face of all top plates of interior walls adjacent to the unconditioned attic space. 6. At interface between the sill plate and foundation. 7. At interface between the bottom plate and the sheathing. 8. At interface between the top plate and the sheathing. 9. At interface between the bottom plate and the subfloor or slab for first floor of slab-on-grade construction. 10. At any horizontal, mid-cavity sheathing seams. 11. At garage-to-house common wall. 12. At wall behind fireplace (block and seal). 13. At joist bays connecting exterior to conditioned space, such as at garage, porch, or overhang (block and seal). 14. At attic knee-walls (block and seal). 15. At insulated floor of room above unconditioned space. 16. At interface between the band joist and the plate below it. 17. At interface between the band joist and the subfloor above it. 18. At joist bays beneath cantilevered floors, such as for bay windows. C. Sealant is recognized in ICC-ES report ESR-3110 as an alternative to the methods prescribed by the code for maintaining the integrity of penetrations of fireblocking when used to fill cracks and voids in construction and the annular space created by the penetration of wood fireblocking by pipes and conduits. D. Seal those gaps and penetrations filled with loose fill insulation during preparation and thoroughly cover them with foam sealant. E. Do not install foam sealant within 3 inches of a heat source with exception of recessed light fixtures, which may be sealed at the interface with the drywall. 3.4 INSTALLATION OF INSULATION, GENERAL A. Install insulation system according to manufacturer's instructions, including compliance with instructions for safety, preparation, and application of products. B. Comply with local code requirements, and 2009 IECC requirements indicated on Table 402.4.2 Air Barrier and Insulation Inspection Component Criteria. C. Do not install insulation on top of or within 3 inches of recessed light fixtures unless the fixtures are approved for such use. D. Install exterior thermal envelope insulation for framed walls in substantial contact and in continuous alignment with building envelope vapor retarder or air barrier. E. Install vapor retarder air barrier in dropped ceilings and soffits in substantial alignment with insulation. F. Install insulation at band joists or rim joists. G. In crawl spaces and where the underside of floors are exposed to unconditioned space, insulation should fill the cavity or be installed in contact with the underside of the decking. If vapor retarder is required by local code, a Kraft vapor retarder must be in contact with a 15 minute thermal barrier. Placement of vapor retarder to be determined by local jurisdiction. H. Within exterior wall framing, install insulation between pipes and backside of sheathing. Cut insulation material as required to fit around wiring and plumbing. I. Where showers and bath tubs are located on exterior walls, install insulation and vapor retarder air barrier between units and exterior. 3.5 INSTALLATION OF LOOSE FILL INSULATION A. Install loose fill insulation in accordance with ASTM C 1015. B. Install to uniform, level thickness. Do not compact. 3.6 INSTALLATION OF BATT INSULATION A. Install batt insulation in accordance with ASTM C 1320. B. If eave ventilation baffles are required, install ventilation baffles at eaves to hold insulation down from roof sheathing and provide positive ventilation from eave to attic space. C. Install in exterior walls, roof and ceiling spaces without gaps or voids. Fluff insulation to full thickness for specified R-value before installation. Do not compress insulation. D. Trim insulation neatly to fit spaces. Insulate miscellaneous gaps and voids. E. Fit insulation tight in spaces and tight to exterior side of mechanical and electrical services within the plane of insulation. F. For unfaced batt insulation, install with friction fit or retain in place with manufacturer's recommended fasteners or mesh.

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