FavoritePlease sign in to add this to your favorites. Topic: Floors Subtopic: Accessible Floors Desired Outcome: Floors over unconditioned spaces (e.g., basements, garages) insulated and sealed Multifamily HomesPrintCopy to ExcelEmail TitleSpecification(s)Objective(s) 4.1301.12a Preparation All floor areas will be open and accessible for spray polyurethane foam ( SPF SPF Spray polyurethane foam ) applicationAny openings larger than 1/4" will be covered with appropriate materialsInsulation dams or end blockers will be installed where neededAll surfaces where SPF SPF Spray polyurethane foam is applied will be clean, dry, and free of contamination and degradationSubstrate surfaces will be wiped, blown, or vacuumed to be free of excessive dust and dirtGrease and oil will be removed using appropriate cleaners or solventsMoisture content of all wood substrate materials will be checked to ensure it is below 18% Prepare all substrate surfaces for the application of SPF SPF Spray polyurethane foam 4.1301.12b Installation Insulation will be installed to prescribed R-value in accordance with manufacturer specificationsApplicator will be certified by a recognized entity for safe and effective application of spray foam SPF SPF Spray polyurethane foam will be applied to specified thickness with a tolerance that establishes a minimum thickness; tolerance standards for the installation will NOT use "average" thickness methodInsulation will be installed to design thickness to perimeter of floor deck, including all adjacent rim/band joistsApplication pass thickness will not exceed manufacturer's maximum pass thickness, including inside corners where deck and joists are located Insulate and seal floors 4.1301.12c Fire protection SPF SPF Spray polyurethane foam will be separated from the occupied space of the building with a thermal and ignition barrier Ignition barrier Any layer of material that protects another from catching fire due to heat or spark Thermal and ignition barriers will be applied as required by building code to all exposed foam insulation Provide necessary fire protection for combustible SPF SPF Spray polyurethane foam insulation 4.1301.12d Installation for fireproofed assemblies with sprayed-on cellulose insulation SPF SPF Spray polyurethane foam insulation will not be applied to existing spray-applied fireproofing Prevent the compromise of the existing fireproofing 4.1301.12e Onsite documentation A dated receipt signed by the installer will be provided that includes: Coverage area Thickness R-value Document job completion to contract specifications Confirm amount of insulation installed Comply with 16 CFR 460.17 Previous Detail Next Detail Back to 4.1301 Accessible Floors Back to Top