Crawl Space & Basement Insulation in Greenwood, IN

Crawl space and basement insulation targets the part of the house most people never see. In many Greenwood-area ranches and tri-levels the crawl space is vented to the outside, the floor above has sagging batts or nothing at all, and the rim joist that sits on top of the foundation is bare wood. The result is cold floors in winter, musty air in summer and a furnace and air conditioner that run longer than they should.

Why moisture matters here

The USDA describes Crosby soils, common on central Indiana's till plains, as somewhat poorly drained with a perched water table 0.5 to 2 feet down in winter and spring. Summers are humid. A vented crawl space pulls in moist July air, which condenses on cooler ducts, pipes and joists, while moisture also rises from bare dirt. That is how floor insulation ends up wet and falling down.

Closing the crawl space

The usual fix is to treat the crawl space as part of the house. We lay and seal a heavy vapor barrier over the ground and up the walls, seal the vents and other openings where appropriate, and insulate the foundation walls and rim joist with closed-cell foam. The 2020 Indiana Residential Code lists R-13 or R-10 continuous for crawl space walls in Zone 5. Some homes need a dehumidifier or a small supply of conditioned air to keep the space dry, and we will say so in the quote.

Basements and rim joists

In basements, closed-cell foam on the rim joist seals one of the biggest air leaks in the house and insulates it in one step. Basement walls can be foamed directly or framed and insulated. The code value for Zone 5 basement walls is R-13 or R-10 continuous. Closed-cell foam is a good fit against concrete because it does not absorb water.

Drainage comes first

Insulation does not stop water. If we see standing water, efflorescence, gutters dumping at the foundation or grading toward the house, we point it out before quoting. Fixing those first protects the insulation and the framing.