Floor Insulation and Underfloor Insulation
In a vented crawl space or where wall insulation is not an option, insulation goes between the joists under the floor. We install batts or other materials with supports so they stay tight against the subfloor, around pipes and ducts, and keep floors comfortable above.
- MaterialsBatts, foam or blown products
- SupportsWires or netting
- DetailsAround pipes and ducts
- ResultSteadier floor temperature
What is included
- 1Warmer floorsCold from below is slowed down.
- 2Stays in placeSupports hold it against the subfloor.
- 3Neat detailsGaps around pipes and ducts closed.
- 4Matched to your spaceVented or sealed, we advise.
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.
- 1InspectWe check moisture and the subfloor first.
- 2ChooseA material and R-value are picked.
- 3InstallInsulation is fitted and supported.
- 4CheckWe look for gaps and sagging.
Is this the right service for you?
- A home with cold floors
- A vented crawl space
- Owners replacing old, fallen insulation
- Anyone adding insulation after repairs
Common questions
Why does old insulation fall?
It gets wet, heavy or loose when supports fail. We use supports and fix the moisture too.
Should I insulate before encapsulating?
Moisture control comes first so the insulation does not get wet.
Will it keep pests out?
Not by itself. Sealing gaps does.
Services that pair with this one
Crawl Space Wall InsulationInsulate the foundation walls instead of the floor and bring the crawl space inside the home's comfort zone.See the service 
Insulation Removal and ReplacementOut with wet, fallen or contaminated insulation, in with materials that fit the space.See the service 
Spray Foam InsulationClosed-cell spray foam seals and insulates in one step on walls and rim joists.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.