Crawl Space & Rim Joist Insulation in Lawrence, KS

Crawl space and rim joist insulation goes after the cold floors and drafts that start at foundation level. In older Lawrence homes the foundation may be stone or brick, with a basement or a crawl space under part of the house, and the rim joist where the framing sits on the foundation is usually bare. Air pours in at the sill all winter.

Rim joists

Closed-cell foam sprayed into each rim bay seals and insulates in one step and does not trap moisture against the wood like loose batts can. HomeGuide lists rim joist foam at $2,000 to $2,500 for a typical house, and Evergy's Kansas chart lists $50 for at least 50 linear feet of rim joist insulation.

Crawl spaces

Many older homes and additions sit on crawl spaces, often vented and damp. Closed-cell foam on the walls and rim, with a sealed vapor barrier on the ground, makes the crawl part of the house and warms the floor above. Lawrence's 2018 IECC table lists R-10 continuous or R-13 cavity for crawl space walls in zone 4.

Basement walls

The city ordinance requires conditioned basement walls to be insulated down to 10 feet below grade or to the basement floor. If you are finishing a basement, closed-cell foam before framing is the simplest way to get there.

Water first

Stone foundations often seep. We look for water entry and grading problems before quoting.

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