North America – Crawl Space

Call for a Better Crawl

Leaving the crawl space uninsulated can be a major source of a home's energy loss. A continuous layer of rigid foam insulation from Dow on the interior surface of the crawl space walls is the most effective way to reduce energy loss in a crawl space. It's moisture resistant and helps reduce the potential for damp crawl spaces. Plus, it cuts easily and installs quickly.

Weatherize and enhance energy efficiency with GREAT STUFF PRO™ Gaps & Cracks Insulating Foam Sealant and FROTH-PAK™ Foam Sealant.

U.S.

Project Specifications	Recommended Dow Solutions
No vents in the crawl space and no ventilation openings to the living area Unheated crawl space
	Scored at 16" and 24" on center Easy to snap to convenient widths Square edge 3/4" -3" thicknesses 25 psi	STYROFOAM™ Brand SCOREBOARD™ Insulation
	Square edges on all four sides 3/4"-4" thicknesses Two board size options 25 psi	STYROFOAM™ Brand Square Edge Insulation
	Interlocking fit 3/4"-2" thicknesses Three board size options 25 psi	STYROFOAM™ Brand Tongue and Groove Insulation
	Glass-fiber-reinforced polyisocyanurate foam core for fire resistance Aluminum foil facers 1/2"-2" thicknesses Three board size options 25 psi	THERMAX™ Sheathing
	Enhanced Installation	GREAT STUFF PRO™ Gaps & Cracks Insulating Foam Sealant⁽¹⁾ FROTH-PAK™ Foam Sealant
No vents in the crawl space but has ventilation openings to the living area
	Glass-fiber-reinforced polyisocyanurate foam core for fire resistance Aluminum foil facers 1/2"-2" thicknesses Three board size options 25 psi	THERMAX™ Sheathing
	Enhanced Installation	GREAT STUFF PRO™ Gaps & Cracks Insulating Foam Sealant⁽¹⁾ FROTH-PAK™ Foam Sealant

Literature
Breathe Easier With a Non-Vented Crawl Space (248KB PDF)
Improve Energy Efficiency and Moisture Performance of Foundations (1MB PDF)
Performance and Value Revealed: THERMAX™ for Basements and Crawl Spaces (516KB PDF)
Start off on the Right Foot With THERMAX™ Sheathing and THERMAX™ White Finish Insulation (276KB PDF)
Installation Procedures for THERMAX™ Sheathing: Closed Crawl Space (124KB PDF)
Installation Instructions
Crawlspaces – Installing STYROFOAM Square Edge, STYROFOAM SCOREBOARD™ or STYROFOAM Tongue & Groove Insulation

⁽¹⁾ Consult the label and Material Safety Data Sheet carefully before use.

Canada

Project Specifications	Recommended Dow Solutions
Heated crawl space or floor above an unheated crawl space	2' x 8' (600 mm x 2400 mm) boards 1/2"-1-1/2" (13 mm-38 mm) thicknesses Butt edge and shiplap edge options 16 psi (110 kPa)	STYROFOAM™ Brand CLADMATE™ Insulation
	Convenient larger 4' x 9' (1200 mm x 2700 mm) boards 1"-2" (25 mm-50 mm) thicknesses Shiplap edge 16 psi (110 kPa)	STYROFOAM™ Brand CLADMATE™ XL Insulation
	2' x 8' (600 mm x 2400 mm) boards 1"-4" thicknesses Butt edge and shiplap edge options 30 psi (210 kPa)	STYROFOAM™ Brand SM Insulation
	Slotted board edges accommodate nailing strip for ease of attachment 2' x 8' (600 mm x 2400 mm) boards 1.5"-2.4" (38 mm-60 mm) thicknesses 16 psi (110 kPa)	STYROFOAM™ Brand WALLMATE™ Insulation
	Enhanced Installation	GREAT STUFF PRO™ Gaps & Cracks Insulating Foam Sealant⁽¹⁾ FROTH-PAK™ Foam Sealant

Installation Instructions
Installing STYROFOAM SM, STYROFOAM CLADMATE/CLADMATE XL in Heated Crawlspaces
Installing STYROFOAM WALLMATE Slotted Insulation Heated Crawlspaces

⁽¹⁾ Consult the label and Material Safety Data Sheet carefully before use.

Dow can help you get to the bottom of your foundation insulation questions.