Every metal building owner in Ontario knows the drill: a cold clear night, then a warm morning, and suddenly the underside of the roof is dripping. It's not a leak — it's condensation, and it's destroying your building from the inside.
Why Steel Sweats
Steel conducts heat almost perfectly, so panel temperature tracks outdoor temperature. Whenever interior air holds more moisture than the cold panel surface can support, water condenses on the steel. Vinyl-faced batt systems slow this down at best — compression at every purlin and fastener leaves thermal bridges, and any tear in the facing lets humid air reach cold steel.
The Closed-Cell Fix
Sprayed directly to the panels, closed-cell foam does three things at once: it insulates (about R-6 per inch), it air-seals (no interior air reaches the steel), and it vapour-seals (moisture can't migrate through the foam). The exposed surface is now warm foam instead of cold metal, and condensation physically cannot occur.
Bonus effects owners notice immediately: the building holds heat, panel drumming in wind quiets down, and lighting improves because foam reflects rather than absorbing light like dark steel.
Shops, Warehouses, Barns
We spray pre-engineered metal buildings, quonsets, and steel-clad pole barns across SW Ontario, and mobilize province-wide for large facilities. If your building rains indoors, send us the dimensions and we'll quote the fix.