Crawl Space Wall Insulation
In a sealed crawl space, insulating the walls keeps the space closer to indoor temperature, so floors above feel warmer and pipes are safer from the cold. We install rigid foam or spray foam on the walls, sized and finished for the space, and seal the top at the rim joist.
- MaterialsRigid foam board or spray foam
- WhereFoundation walls and rim joist
- Works withA sealed, conditioned space
- ResultWarmer floors above
What is included
- 1Warmer floorsThe space stays closer to indoor temperature.
- 2Pipe protectionLess freezing risk in cold snaps.
- 3Tidy and durableClean, rigid surfaces.
- 4Pairs with sealingPart of a closed system.
From the first call to a dry crawl space
Our partner experts repair and protect crawl spaces in cities across the country. Find yours below and ask for a free estimate.
- 1CheckWe confirm the space is dry and sealed.
- 2CutPanels or foam are sized to the walls.
- 3FitInsulation is installed and sealed.
- 4FinishThe rim joist is sealed on top.
Is this the right service for you?
- A sealed crawl space with cold floors
- A home with pipes in the crawl space
- Owners who want an energy-friendly option
- A house after encapsulation
Common questions
Wall or floor insulation?
Sealed spaces often use wall insulation. Vented spaces use floor insulation. We explain which fits.
What R-value do I need?
It depends on your climate and local code, and we check the requirement.
Is spray foam better?
Each has strengths, and we explain both.
Services that pair with this one
Rigid Foam Board InsulationCut-to-fit foam boards on walls and in gaps, a clean and durable insulation option.See the service 
Spray Foam InsulationClosed-cell spray foam seals and insulates in one step on walls and rim joists.See the service 
Crawl Space EncapsulationSeal the floor, walls and vents so ground moisture and outside air stay out of the space under your home.See the service Find your city
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Find out what is under your house.
Call or text, or send the form for your free estimate. Tell us what you notice, from smells and cold floors to water and sagging.