3.1402.3 Closed Crawl Spaces—Air Sealing Exterior Wall

Topic: 
Basements and Crawl Spaces
Subtopic: 
Crawl Spaces
Desired Outcome: 
Well-sealed exterior wall prevents leakage and pests
TitleSpecification(s)Objective(s)
3.1402.3a
Seal penetrations

Penetrations will be sealed with a durable material

A minimum expected service life of 10 years will be ensured

Prevent air and moisture penetration into crawl space

3.1402.3b
Pest exclusion

If penetration is greater than ΒΌ inches, caulking, steel wool, or other pest-proof material will be used to fill the penetration before sealing

Prevent pest entry