Spray Foam Insulation in St. Cloud, MN

Ask around and you will hear the number behind most of our spray foam insulation work in St. Cloud: the city's all-time record low of -43 F. January's normal daily mean sits at 11.6 F, which means a furnace in this town is working hard for weeks at a stretch, and every crack around a rim joist or attic hatch is leaking paid-for heat the whole time.

Why the cold changes the plan

In a milder climate, a little air leakage is a comfort problem. Here it is also a moisture problem. Warm, damp indoor air that slips into a cold attic or wall cavity reaches its dew point fast, and on a 10 F night that happens within inches of the drywall. Frost builds on the underside of the roof deck, melts on the first sunny day and drips back onto the insulation. Closed-cell foam stops that air at the source and resists vapor at the same time, so it is our first choice for the rim joist, the attic edges over the top plates, and cantilevered floors.

Snow on the roof, heat in the attic

The airport averages about 47.9 inches of snow a year, with January alone bringing around 8.8 inches. A blanket like that turns into an ice dam when attic heat warms the roof deck from below. The fix is rarely more ventilation by itself. It is sealing the bypasses under the insulation (plumbing chases, light boxes, chimney gaps), then building depth. The Department of Energy's chart lists R60 as the target for an uninsulated attic in the two coldest zones it covers, 6 and 7, so we plan to that figure.

A city of renters and owners

Census QuickFacts for 2020-2024 shows owners living in 48.6% of St. Cloud's housing units. That mix matters. Owners of rental buildings usually want durable, low-maintenance work that cuts tenant complaints about cold bedrooms. Owner-occupants, on the other hand, often want to finish a basement or bring a bonus room up to comfort. We price both kinds of job the same way: room by room, with the material, depth and R-value written down.

Open cell, closed cell or blown-in

Open-cell foam is the lighter, cheaper-per-inch option and performs well on roof decks and interior walls, but the DOE warns against using it below ground level, where it can take on water. Closed-cell offers more R-value per inch and stronger moisture resistance, which is why it goes on basement walls and rim joists. Wide, open attic floors are often better served by blown-in insulation once the air leaks underneath are sealed.

Get a free estimate or call (320) 433-6603.