Residential
Crawl Space Insulation

Crawl Space Insulation

A low-cost way to prevent moisture, mold & heat loss

Should You Seal Your Crawl Space?

We hear from many of our customers that their crawl spaces (especially under houses, or basements) are where they want insulation. The cost to insulate these areas is relatively low compared to the big difference you’ll see, not just in floor comfort and heating bills, but also in a warmer, drier basement or crawl space.

Crawl Space Issues

Crawl spaces can be useful, but they can also harbor mold, moisture, dampness, and experience high humidity levels (not to mention critters or insects). All of these will affect the indoor air quality of your home, can have a negative impact on your family’s health, and can have a destructive effect on the structure, including rotted joists, subfloor, sills, and more.

If there is standing water in the crawl space—depending on the severity—we would recommend remediation for that before we insulate. Our work will definitely fix the drafts and other unpleasant effects listed above.

Best Way to Insulate a Crawl Space

Low crawl space with spray foam applied to walls

A sealed, encapsulated crawl space requires several steps. Homeowners often seek insulation for the crawl space ceiling, though this is not always the best approach. Although every space is different, we normally install vapor barriers along dirt floors, then seal the vapor barrier tight to the walls, and around other obstructions and penetrations, like piers and posts. This brings the crawl space into the “conditioned” area, and seals all the cold out, leaving you with the bonus of a clean crawl space.

We can access crawl spaces with as little height clearance as 18 inches.

Next is insulation. If you have ductwork in these areas, there are different ways to handle sealing it than simply installing fiberglass to the underside of the floor (the crawl space ceiling). In order to bring the ductwork into the heated/conditioned space, we would insulate the crawl space walls. This is the most economical and beneficial approach.

If you experience frozen water pipes in your crawl space, we can remedy the problem with spray foam insulation. Not only will you have a drier, warmer space, but we eliminate the nuisance of frozen water lines.

All of this means a more comfortable home, lower energy bills, healthier air quality, and greater peace of mind.

We can only decide what’s best for your crawl space by inspecting it in person. We’ll give you a clear explanation of the work, trade-offs, and options.

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