Frequently Asked Questions

What types of SPF is there?

SPF comes in two forms: closed cell and open cell. Closed cell dries rigid and is firm when pressed. It does not allow moisture to pass through it. Open cell is spongey when pressed and is not as good an insulator. It is a good sound absorber and does allow water vapour to pass through.
SPF might be mis-sold as a long-term energy saving investment, lasting for more than 80 years, which will stop tiles and slates from slipping and will strengthen the roof by holding them in place. An installer may also advise that it not only increases the insulation and may lower energy bills by up to 20%, but will also protect water tanks and pipes from freezing and create a dry, clean and useful loft space. Such claims are all very debatable.

Is there any problem with SPF?

The main problem with SPF is that it can lead to severe condensation in the roof space by blocking ventilation. Whilst this is reduced with the open cell “breathable” type, condensation can still occur where the foam and roof covering material meet. The resultant moisture can then lead to rot in roof timbers. Both types can also conceal defects in the roof covering that can result in water penetration – again leading to rot in roof timbers

Can I carry out the Spray Foam Removal work on my own?

Having years of experience doing Spray Foam Removal, we do not recommend that
anyone does the work on their own. Removing spray foam is not as easy as it might appear
and needs to be carried out by trained professionals. Also, the foam itself may be toxic and
hazardous to your health. Additionally, you could cause damage to electric cabling that has
been covered during the spray foam installation process