4.1101.3 Exterior Wall Spray Polyurethane Foam (SPF)—Masking and Surface Preparation

Topic:

Walls

Subtopic:

Preparation

Desired Outcome:

Finished surfaces are protected and SPF SPF Spray polyurethane foam has a suitable surface to adhere to

For supporting material, see Referenced Standards, General Information on Spray Polyurethane Foam (SPF), Calculation of the Infiltration Credit and Building America Solution Center.

Single-Family Homes

Title	Specification(s)	Objective(s)
4.1101.3a Surface protection	Finished surfaces that should not be covered with SPF SPF Spray polyurethane foam (e.g., windows, doors) will be identified Surfaces will be covered or sealed with appropriate material (e.g., plastic film, masking tape) to protect from SPF SPF Spray polyurethane foam overspray	Prevent overspray and potential damage to finished surfaces
4.1101.3b Substrate repair	Cracks, gaps, and holes in the substrate will be covered or sealed in accordance with manufacturer specifications with appropriate material	Prevent waste of SPF SPF Spray polyurethane foam Prevent overspray into adjacent areas
4.1101.3c Substrate cleaning	All surfaces where SPF SPF Spray polyurethane foam is applied will be clean, dry, and free of contamination and degradation Substrate surfaces will be wiped, blown, or vacuumed to be free of excessive dust and dirt Grease and oil will be removed using appropriate cleaners or solvents Moisture content of all wood substrate materials will be checked to ensure it is below 20%	Ensure proper bonding of SPF SPF Spray polyurethane foam to substrate surfaces

Title

Specification(s)

Objective(s)

4.1101.3a
Surface protection

Finished surfaces that should not be covered with SPF SPF Spray polyurethane foam (e.g., windows, doors) will be identified

Surfaces will be covered or sealed with appropriate material (e.g., plastic film, masking tape) to protect from SPF SPF Spray polyurethane foam overspray

Prevent overspray and potential damage to finished surfaces

4.1101.3b
Substrate repair

Cracks, gaps, and holes in the substrate will be covered or sealed in accordance with manufacturer specifications with appropriate material

Prevent waste of SPF SPF Spray polyurethane foam

Prevent overspray into adjacent areas

4.1101.3c
Substrate cleaning

All surfaces where SPF SPF Spray polyurethane foam is applied will be clean, dry, and free of contamination and degradation

Substrate surfaces will be wiped, blown, or vacuumed to be free of excessive dust and dirt

Grease and oil will be removed using appropriate cleaners or solvents

Moisture content of all wood substrate materials will be checked to ensure it is below 20%

Ensure proper bonding of SPF SPF Spray polyurethane foam to substrate surfaces