Continuous, contiguous, safe, pest and weather resistant thermal boundary that prevents air movement @ 50 Pascals
Specifications
- SF
- MF
Specification | Objective |
---|---|
Verify that installation area is free of: active water leaks, fuel leaks (i.e., gas, oil, propane), and pest intrusions energized knob and tube wiring uncovered electrical junctions improperly terminated devices (ventilation fans, dryers, plumbing stacks, condensate lines, combustion appliance flues/chimneys, etc.) unshielded high-temperature devices (non-IC rated recessed lights, chimneys, flues, vents, etc.) unless they are zero clearance devices insulation escape openings Verify that installation area is: intact, able to support insulation weight, and air sealed |
Ensure space can be safely insulated |
- SF
- MF
Specification | Objective |
---|---|
Select insulation that has a flame spread and smoke development index of 75/450 or less and backing material that has a smoke development index of 450 or less when tested in accordance with ASTM E84 or UL 723 Select rigid backing material that: is a permanent air barrier will support installed insulation without failure |
Select fire safe materials |
- SF
- MF
Specification | Objective |
---|---|
Select sealants that: are compatible with their intended surfaces allow for differential expansion and contraction between dissimilar materials meet the requirements of the applicable fire safety code (e.g., thermal or ignition barriers) |
Select safe and effective sealants |
- SF
- MF
Specification | Objective |
---|---|
Remove any existing insulation or vapor barrier materials from installation area Remove any obstacles, fasteners, or protruding objects that will prevent insulation from fully contacting the bottom of the floor joist |
Prevent condensation, create uninterrupted installation surface |
- SF
- MF
Specification | Objective |
---|---|
Install rigid insulation continuously over entire accessible area to prescribed R-value in full contact with the air barrier and all structural framing without gaps, voids, or misalignments If installing multiple layers, offset seams at least 12" and seal the seams of each layer before applying the next Where rigid foam plastics are used, in no case will the final thickness exceed the manufacturer's tested thickness used to determine the maximum 75 flame spread and 450 smoke-development index when tested to ASTM E84 or UL 723 |
Continuous and contiguous thermal boundary that prevents excessive vapor intrusion |
- SF
- MF
Specification | Objective |
---|---|
Mechanically fasten a continuous rigid barrier to underside of floor assembly that is suitable to withstand weather, moisture, and pest contact, and with a fire-resistance rating equal to the resistance rating of the original floor assembly |
Insulation protected from weather, pests, and moisture |
- SF
- MF
Specification | Objective |
---|---|
Seal all seams, joints, connections, penetrations, etc. in the rigid protective barrier with compatible sealant Stuff any gaps larger than 1/4" with copper metal mesh or steel wool prior to sealing Cover exposed corners of the rigid protective barrier with reinforced hardware cloth or metal board bead |
Airtight, pest resistant exterior |
- SF
- MF
Specification | Objective |
---|---|
Apply a weather-resistant barrier to the exposed side of the insulation (e.g., exterior insulated finishing system and spray-on roof waterproofing over foam) |
Protect insulation from weather, light and impact |
- SF
- MF
Specification | Objective |
---|---|
Separate all foam products from living space with a thermal barrier material (e.g., 1/2" gypsum wallboard) as specified by applicable building code If code requirements are unclear, consult local code officials for clarification |
Minimize ignition and combustion potential |
- SF
- MF
Specification | Objective |
---|---|
Post a dated receipt signed by the installer that minimally includes: Installed insulation type, coverage area, installed thickness, and installed R-value |
Comply with 16 CFR 460.17 and document contract compliance |