Hi all,
I'm new to the forum and purchased a 1950s detached house about 6 months ago.
The existing flat roof of a two storey extension was sagging badly and had damp spots. A relative of mine is a roofer and replaced the 5m x 3m area with new joists, plywood and several different layers of torch on felt.
Upon completion I decided to look at the different options of insulation and noticed that this was deemed cold roof construction without ventilation. I can generally put my hand to most tasks but have never been involved in flat roof construction.
The 5inch joists are exposed to the underside and I haven't yet insulated it so I can still acces the underside.
Is there a way I can ventilate it as I don't want to rip the roof back up? Can vents be added to the fascia boards? I was going to buy 75mm celotex to ensure 50mm clearance but am now worried about potential condensation, after reading about its construction online.
Thanks in advance,
I'm new to the forum and purchased a 1950s detached house about 6 months ago.
The existing flat roof of a two storey extension was sagging badly and had damp spots. A relative of mine is a roofer and replaced the 5m x 3m area with new joists, plywood and several different layers of torch on felt.
Upon completion I decided to look at the different options of insulation and noticed that this was deemed cold roof construction without ventilation. I can generally put my hand to most tasks but have never been involved in flat roof construction.
The 5inch joists are exposed to the underside and I haven't yet insulated it so I can still acces the underside.
Is there a way I can ventilate it as I don't want to rip the roof back up? Can vents be added to the fascia boards? I was going to buy 75mm celotex to ensure 50mm clearance but am now worried about potential condensation, after reading about its construction online.
Thanks in advance,