Why Closed-Cell Is the Only Spray Foam We Apply
Superior R-value per inch, a built-in vapour barrier, structural rigidity, and total moisture immunity. One product. Done right.
Walk into most insulation companies and you'll get a menu: this product for this budget, that product for that one. Walk into ours and you get one answer, because we made the product decision before you called. Seal Right applies closed-cell spray foam exclusively.
There is an open-cell foam on the market — lighter, cheaper per inch, and popular with contractors selling on price. We evaluated it and chose not to apply it. Open-cell absorbs moisture, needs a separate vapour barrier in Ontario's climate, delivers barely half the R-value per inch, and adds no strength to the structure. In the buildings we work on — steel, barns, basements, flat roofs — those aren't trade-offs, they're failure modes.
Closed-cell costs more per inch and it's worth it in every assembly we spray. Here's what the product actually does.
We mobilize anywhere in Ontario for projects at scale.
Why It Works
What Closed-Cell Delivers
- About R-6 per inch — the highest R-value of any field-applied insulation
- Vapour barrier built in at two inches — code-recognized, no poly, no seams
- Air barrier in the same pass — the blower door test passes itself
- Hydrophobic — does not absorb water, ever; no mould food, no sagging
- Cures rigid and bonds to the structure — measurably stiffens walls and panels
- Performs identically at year one and year twenty-five
Where We Apply It
Why It Wins in Every Assembly We Spray
- Steel buildings — stops condensation; open-cell can't
- Basements — moisture-immune against concrete
- Rooflines — real R-values in limited rafter depth
- Flat roofs — high-density closed-cell IS the roof
- Livestock barns — survives humidity that destroys everything else
- Rim joists — seals, insulates, and vapour-controls in one
FAQ
Common Questions
Because we'd be selling you a product we don't believe in for the buildings we work on. Open-cell absorbs moisture, requires a separate vapour barrier in this climate, and delivers roughly half the R-value per inch. A cheaper product that underperforms isn't a saving — it's a smaller upfront number with a bigger long-term cost. One product, applied right, every time.
Ready to get started?
Call (519) 324-6173