04/05/2026
Never easy talking to a homeowner and the contractor who was unaware of limited approval use of these two tank froth pack insulation kits offered through just about every hardware store in Canada. They are only approved for air sealing around penetrations such as ductwork or plumbing and can only fill a gap no greater than 6”. The reason for this is the foam is not 2lb density but rather only 1.5 lb density which disqualifies it as a vapour barrier. In fact, the foam is not a moisture barrier and can absorb moisture. It’s actually R-value is also significantly less at about +|- 3.5 R-value per inch. These kits never spray consistently, depths vary and gaps straight to the exterior deck is common. Often as the tanks empty the risk of offer ratio pressure can cause an imbalance between the two chemicals which leads to an off-ratio hazardous material (raw chemicals) being installed on the building.
If inspected, the building inspector is obliged to Red Tag the job-site and demand its removal, which is very time consuming.