4.1104.4a
All interior surfaces of the cavities planned to be insulated will be inspected for loose paneling joints, occupant wall hangings, and other wall obstructions
Objects will be removed from the interior surfaces of the exterior walls as needed
Interior paneling will be repaired and secured as necessary
Holes will be drilled from the interior of the house
A hole no larger than the spray nozzle will be drilled in each cavity above the door or window
When possible, the hole will be drilled in the panel groove
Prepare wall cavity for insulation
Prevent damage from overspray to occupant possessions
4.1104.4b
Cavity will be probed to assess conditions and volume of cavity
Determine the approximate amount of foam to be installed in the cavity
4.1104.4c
Flame spread index of foam insulation will not exceed 75 and a smoke- developed index of no more than 450 when tested in the maximum thickness intended for use in accordance with
ASTM
ASTM
ASTM International, www.astm.org
E84 or
UL
UL
Underwriters Laboratories
723
Foam insulation will be separated from the interior of the building by an approved thermal barrier at a minimum of 1/2" gypsum wallboard or a material that is tested in accordance with the acceptance criteria of both the Temperature Transmission Fire Test and the Integrity Fire Test of
NFPA
NFPA
National Fire Protection Association, www.nfpa.org
275
Two-part foam selection will be based on regional considerations
100% of each cavity will be filled to a consistent density without bulging of panels or siding
Fill entire wall cavity to the prescribed R-value to reduce air
infiltration
Infiltration
The uncontrolled passage of outside air into a building through unintended leaks in the building envelope
Fire safety will be maintained
4.1104.4e
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
