4.1003.7 Ignition and Thermal Barriers—Spray Polyurethane Foam

Topic: 
Attics
Subtopic: 
Attic Ceilings
Desired Outcome: 
Meet building code requirements for fire protection of spray polyurethane foam
For supporting material, see Referenced Standards, General Information on Spray Polyurethane Foam (SPF) and Building America Solution Center.
TitleSpecification(s)Objective(s)
4.1003.7a
Identify fire safety requirements

Meet or exceed local fire safety requirements for installation of SPF SPF Spray polyurethane foam foam

Consult local codes to ensure installation complies with fire safety requirements

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

Ensure SPF SPF Spray polyurethane foam installed in attic meets fire safety requirements
4.1003.7b
Installation of ignition barrier Ignition barrier Any layer of material that protects another from catching fire due to heat or spark

If attic is to be used only for the service of utilities, foam will be separated from the attic space using a suitable ignition barrier Ignition barrier Any layer of material that protects another from catching fire due to heat or spark covering or coating

Check manufacturer specifications and/or local codes for appropriate ignition barrier Ignition barrier Any layer of material that protects another from catching fire due to heat or spark coatings/materials

Protect SPF SPF Spray polyurethane foam insulation in the attic to minimize possibility of ignition and combustion
4.1003.7c
Installation of thermal barrier

If attic is to be used for storage or occupancy, spray foam will be separated from the attic space using thermal barrier material (e.g., ½" gypsum wallboard)

Consult manufacturer specifications and local codes for approved ignition/thermal barrier, materials, or coatings

Protect SPF SPF Spray polyurethane foam insulation in the attic to minimize possibility of ignition and combustion
4.1003.7d
Occupant education

Documentation of ignition or thermal barrier material installation and limitations on attic use, if any, will be provided

Provide occupant with documentation of installation