Spray foam insulation has been touted as an easy way to keep homes warm and insulated, but it comes with hidden costs that could affect your property’s value
Spray foam insulation is a liquid foam which is sprayed into position and then expands and sets into an insulating layer. It’s most commonly used on the underside of roofs, usually in a property’s loft space.
On the face of it, this form of insulation seems to have many advantages. It can expand into every gap, it’s quick to apply and it was marketed as being able to prolong the life of an ageing roof (particularly one that pre-dated roofing felt).
So what’s the problem?