Ontario buildings face a specific set of problems: long heating seasons, humid summers, freeze-thaw cycling, and a building code that keeps raising the bar on air tightness. Closed-cell spray foam answers all four at once — which is why it's the only product Seal Right applies.
The Highest R-Value Per Inch Available
Closed-cell spray foam delivers roughly R-6 per inch — nearly double what batt insulation achieves. In wall cavities where depth is fixed, that difference decides whether you meet code with room to spare or squeeze past it. In retrofit work, it means hitting target R-values in spaces where nothing else physically fits.
Insulation and Vapour Barrier in One Pass
At two inches, closed-cell foam qualifies as a vapour barrier under the Ontario Building Code. No poly, no acoustic sealant, no taped seams that fail the blower door test. One application handles insulation, air barrier, and vapour control — and it can't be torn, punctured by trades, or installed wrong side out.
It Makes the Building Stronger
Closed-cell foam cures rigid and bonds to framing and sheathing. Studies have measured meaningful racking-strength increases in walls sprayed with closed-cell foam. On steel buildings and pole barns, that rigidity also kills panel drumming and vibration.
It's also the only insulation that shrugs off water. Flood a batt and it's garbage. Closed-cell foam is hydrophobic — it doesn't absorb water, doesn't feed mould, and doesn't sag out of the cavity over time.
The Bottom Line
Some contractors sell whatever product wins the job. We made a different call: one product, applied right, every time. If you want to talk through whether closed-cell fits your project, send us the details through our quote form and we'll walk you through it.