Crawl Space Insulation in Dover, OH

Crawl space insulation matters in the valley because many homes, additions and porches sit over a crawl space instead of a full basement. A vented crawl space with a dirt floor lets cold air under the house in winter and damp air in summer. The floor above stays cold, pipes are at risk and musty air drifts up into the living space.

The sealed approach

Rather than stuffing batts between the floor joists, where they sag and hold moisture, we insulate the crawl space walls with closed-cell foam, seal the rim joist and vents and lay a heavy vapor barrier across the ground. The crawl space becomes part of the house's thermal envelope. Ohio's Zone 5 table lists R-10 continuous or R-13 cavity for crawl space walls.

Moisture first

If water pools in the crawl space after rain, drainage has to be addressed. We look for standing water, wet framing and mold before quoting.

Floor insulation option

In some cases, such as a porch room over an open crawl, insulating the floor itself with closed-cell foam is the better choice. Ohio's table lists R-30 for floors over unheated space in Zone 5.