Cover crawlspace floor

Insulation · Venting Roofs · printed page 239 (PDF page 240)

Original page Sign in to save

Book index entries

Cover Crawlspace Floor Crawlspace – Cover Floor Floor – Crawlspace – Cover Air/Vapor Barriers Vapor Retarders

Text in the illustration

a crawlspace with an uncovered earth floor can contribute a very significant amount of moisture to the house environment - equivalent to several gallons
a vapor barrier (such as 6 mil polyethylene) should be laid down, sealed at the edges and joints, and ballasted with gravel
crawlspace
dirt floor
gravel
seal at edges
don't ventilate crawlspace

Generated explanation

A schematic house section compares an uncovered crawlspace earth floor on the left with a vapor-barrier-covered floor on the right. Wavy lines rise from the exposed soil, and pouring buckets illustrate the significant amount of moisture that can enter the house environment. The recommended side shows a ground vapor barrier ballasted with gravel and sealed at the foundation edge; the annotation also specifies sealing joints and gives 6 mil polyethylene as an example. A red X marks the uncovered approach and a green check marks the covered approach. A prohibition symbol at a foundation opening accompanies the instruction not to ventilate the crawlspace.

Related illustrations

1393

Cover crawlspace floor

· p. 254

A house cross-section compares an uncovered crawlspace earth floor on the left with a vapor-barrier-covered floor on the right. A red X, rising wavy lines, and pouring buckets illustrate the significant moisture contribu