From potential offgassing, to damaging rafters in roofs, spray foam safety myths certainly abound.
In this article, we aim to debunk each one in turn, and reinstate spray foam’s well-deserved reputation as a first-rate insulation solution, that performs for the life of the building. Let’s begin…
Spray Foam Safety: The 4 Main Myths
In terms of installation, spray foam is applied in a thin layer, and expands quickly, up to 100 times its original size.
It’s common for a filled area to overflow, and then the extraneous material needs to be sawed off.
As spray foam forms a superior, airtight barrier, it can seal a house completely. This is effective in the prevention of heat transfer, but could cause problems in ventilation is a poor quality spray foam substitute is used. We do want some fresh air inside; we just want it there under our own terms.
By choosing an accredited BBA installer, such as Home Logic, you can assure all areas of your installation are covered.
This is not an issue with the product itself, but with the installation. Spray foam requires its installers to undergo a training program, to ensure proper procedures are undertaken to ensure no unpleasant odours are left lingering.
Spray foam is a good air barrier, but if the closed-cell variety is chosen, interior water vapour can still pass through it to the underside of the roof, potentially leading to condensation.
For this reason, we use open cell spray foam for our residential projects, which allows moisture to dissipate through it, thereby minimising the chance of damp.