Crawlspace Air Sealing

Seal gaps at the rim joist and penetrations to block drafts, reduce odors, and help insulation and ductwork perform their best.

Signs You Need Crawlspace Air Sealing

Older homes around Clark County often lack proper air barriers at the rim joist. Sealing here dramatically improves comfort and reduces odors.

High heating and cooling bills despite insulation

Air sealing reduces energy waste so your home retains conditioned air and lowers utility costs.

Cold drafts coming from floors or vents

Air sealing makes living spaces feel warmer and more comfortable without chilly drafts.

Musty or damp odors rising into the home

Air sealing keeps crawlspace odors from entering, leaving indoor air fresher and cleaner.

Step 1

Identify leakage at sill plates and penetrations

Step 2

Apply foam/caulk and backer; detail around ducts and pipes

Step 3

Use fire-safe caulk and backer at fireplaces, flues, or heat-producing fixtures

Yes, but results are best when combined with properly supported insulation.
We maintain clearances and use appropriate materials; we can coordinate combustion safety checks where needed.
Often—sealing limits crawlspace air entering the home, which can reduce musty smells.
It closes many gaps, but pest exclusion is a separate scope. We can bundle both.
We can arrange testing if requested for performance verification.

Tell us about your project and we’ll send a no-pressure quote.