SPF Insulation

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 and able to support insulation weight

Select SPF that is between 0.5 and 2.0 lb/ft3 in density and has a flame spread/smoke development index of 25/450 or less when tested in accordance with ASTM E84 or UL 723

Remove existing insulation and vapor retarders from installation area

Install durable backing material over any escape holes in the air barrier

Ensure utility junctions remain accessible per local code requirements

Remove contaminants from all SPF application surfaces that will prevent full adhesion or cause degradation

Verify all SPF application surfaces are in accordance with manufacturer specifications for moisture content and temperature

Apply SPF to prescribed R-value in a continuous layer from subfloor surface, over band/rim joist and sill/wall plate, and in contact with foundation or ceiling below using a pass thickness maximum as indicated by manufacturer specifications

Install to a thickness of least a class II vapor retarder or have at least a class II vapor retarder coating or covering in direct contact with the interior (or warm) side of the SPF

If foam is no more than 3 1/4" thick, is between 0.5 and 2.0 lb/ft3 in density, and has a flame spread/smoke development index of 25/450 or less when tested in accordance with ASTM E84 or UL 723, no thermal barrier is required

If foam is thicker than 3 1/4", does not meet the flame and smoke index, or is not between 0.5 and 2.0 lb/ft3 density, separate foam from the subspace with a suitable thermal barrier covering or coating as indicated in manufacturer's specifications and applicable building code

If code requirements are unclear, consult local code officials for clarification

Post a dated receipt signed by the installer that minimally includes: Installed insulation type, coverage area, installed thickness, installed R-value, manufacturer product name, manufacturer supplied material density, and flame spread and smoke development index as tested per ASTME E84 or UL 723