Leaky rim joists and un-insulated foundation walls in crawlspaces are often the major infiltration point for outside air. During the cold winters in the Twin Cities Metro area, these areas leak out hot air, cooling the basement and taxing heating equipment, especially when ductwork and plumbing runs through the space. Cool, air-conditioned air leaks out during the summer, slowly turning your cool home into a lukewarm, uncomfortable space.

Making sure these areas are properly insulated and sealed is key to maintaining comfort in the home and keeping your utility bills down.

“Conditioning” Your Crawlspace

Properly insulating a crawlspace usually means bringing it into the “conditioned space” of the home, so the environment in the crawlspace matches the environment in, say, the bedroom. Rather than isolating the room above from the crawlspace, the space is sealed and insulated against the outdoor (“ambient”) air.

Controlling Outdoor Moisture

Unfinished crawlspace floors should have a vapor barrier in place. The walls and rims should also be insulated with closed cell polyurethane foam. These measures ensure that only minimal amounts of heat are lost to the outside, and that no moisture migrates in from the surrounding soil.

In some taller crawlspaces, foam board may be applied to exterior walls as well. Moisture wicking insulation materials (like fiberglass) should not be used in these spaces. If SCES is doing a renovation, we’ll often discard any leftover fiberglass insulation, since it retains moisture and odors.

Don’t let nasty crawlspaces make your home uncomfortable. Get in touch with us to set up a crawlspace evaluation.

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Testimonials

Tom & Pat J., New Richmond, WI

Thanks to St. Croix Energy Solutions, Xcel Energy, and New Richmond Utilities, we are happy to submit a recommendation supporting the energy saving actions they suggested and provided. The energy analysis, the insulation work done by St. Croix Energy Solutions, the rebates offered by Xcel and NRU made this a smart move for us. We have seen decent energy savings during a hard Wisconsin-Minnesota winter. This is only the second time I have ever submitted a testimonial statement like this.  Believe me when I say, again, thanks to you all for encouragement, services, and financial incentives offered to make this happen! We hope these programs continue so consumers are... (read more)