Foundation Vent Sealing
Foundation vents were meant to dry crawl spaces, but in humid weather they often do the opposite, bringing in warm moist air that condenses on cool surfaces. We seal vents with rigid foam and sealant or with finished covers, so the space can be controlled instead of left to the weather.
- MethodRigid foam, sealant or covers
- LookNeat from outside
- WhyStops humid air and pests
- Pairs withEncapsulation
What is included
- 1Less humid airSummer air no longer condenses inside.
- 2Fewer pestsOpen mesh no longer invites them.
- 3A tight spaceThe space can be dried and held.
- 4Tidy finishLooks clean from the yard.
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.
- 1SurveyWe count and measure every vent.
- 2FitPanels are cut to each opening.
- 3SealEdges are sealed from inside and out.
- 4CheckWe confirm there are no gaps.
Is this the right service for you?
- A home with open foundation vents
- A crawl space that is damp in summer
- Owners planning encapsulation
- A house with pest entry at vent screens
Common questions
Do I need vents for the house to breathe?
A sealed and conditioned crawl space is controlled with drying and monitoring instead of vents.
Will sealing vents trap moisture?
Not when the space is also sealed, drained and dried. That is the point of a system.
Can I still get in?
Yes. Access doors stay, and we make them sealed and easy to use.
Services that pair with this one
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 
Crawl Space Wall LinersLiner on the foundation walls blocks moisture that comes through block and concrete.See the service 
Crawl Space Air Sealing and ConditioningSeal the leaks at the rim and the floor, then control the air in the space on purpose.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.