Spray foam that seals and insulates at once.

Some spots need a seal and an R-value at once.

There are places in a Bellingham home where batts just don't work. The rim joist around the top of the foundation is a notorious air leak that loses a ton of heat. Bonus rooms over the garage freeze because the walls and ceiling are full of gaps. Vaulted and cathedral ceilings have shallow, oddly shaped cavities. In all of these, the air leak is as big a problem as the missing insulation, and you need to fix both at the same time.

Spray foam does exactly that. It expands to fill the cavity, seals the air leaks, and gives you an R-value in one step. We use open-cell where we want a softer, vapor-open fill, and closed-cell where we need a tighter air and moisture seal and a higher R-value per inch, like at the rim joist. In our wet climate, getting the right foam in the right spot matters, so we don't just spray everything the same. The price runs by the board foot because thickness and foam type drive it, so we quote it after we see the space.

What it actually costs.

Our four-step process.

1. Free assessment

   We look at the rim joist, bonus room, or vault, figure out which foam fits, and quote it by the board foot.

2. Mask and prep

   We protect the surrounding surfaces and prep the cavity so the foam goes only where it should.

3. Spray and seal

   We apply open-cell or closed-cell foam to the right thickness, sealing the air leaks and insulating in one pass.

4. Trim and check

   We trim the foam flush where needed and check the seal before we pack up.

Why hire a local crew for this work.

• Air-seals and insulates in one step
• Closed-cell for rim joists and tight moisture seals
• Open-cell for softer, vapor-open fills
• Fixes freezing bonus rooms and vaulted ceilings
• The right foam for our wet climate, not one-size-fits-all

Frequently asked questions.

How much does spray foam insulation cost in Bellingham?

Spray foam is priced by the board foot, usually $2 to $7 per board foot in Bellingham, because the foam type and thickness drive the cost. Open-cell is cheaper per inch, closed-cell costs more but seals tighter and adds more R-value per inch. We quote the exact number after we see the rim joist, bonus room, or vault, since the area and thickness decide it.

Open-cell or closed-cell spray foam, which do I need?

It depends on the spot. Closed-cell is denser, seals air and moisture tightly, and packs more R-value per inch, so it's our pick for rim joists and anywhere moisture is a concern. Open-cell is softer, costs less, and is vapor-open, which works well for interior walls and some ceilings. In our marine climate the moisture side matters, so we match the foam to the location instead of spraying everything the same.

Is spray foam safe and worth the extra cost over batts?

For the right spots, yes. Spray foam costs more than batts up front, but it seals air leaks that batts can't, which is often where most of the heat loss is, like a leaky rim joist or a gappy bonus room. Once it's cured it's inert and stable. We don't foam everything, just the places where sealing and insulating at the same time is worth it.

Related services.

Spray Foam Insulation across Whatcom County.

Every neighborhood we serve has its own story, century-old walls in the Lettered Streets, cold floors over the crawlspaces in Columbia, damp ground out by the lake. Pick your area for local notes: