Hi spraybodge It is very unlikely that venting the roof space will make any difference. Suggest you investigate areas where damp is occurring but you will probably end up having to redo the roof construction - insulation, felt, battens, tiles. Regards S
stoneyboy wrote:Hi spraybodge Sadly spraying foam on the underside of a tiled roof leaves no gap for ventilation so even if you added vents there would be nowhere for the air to go. Regards S
If I installed ridge vents then would you not have cool air coming through the soffit vents and then warmer air venting out of the top of the roof? Basically trying to convert an ‘attempted warm roof’ into more of a cold roof.
Also my foam is sprayed to the felt rather than the back of the tile if that makes a difference?
I’m sure you’re far more knowledgable than I am on this so not questioning you on the validity of what you’ve said, just trying to learn more about why this may not work. Thank you.
Hi spraybodge Condensation will form towards the outer side of the foam, it will not be able to escape because the under felt will seal it in. The only way out is to run down towards the edges. By all means try fitting vents and if it doesn’t solve the issue you know what to do next. Regards S
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!