June 14, 20197 yr Hi All We have fitted today two out of three velux windows and I am not entirely happy about the look. They look a bit clunky and protrude significantly above the roof and ridge line. The roof is a 15 degree pitch which has 18 mm sarking and will have a membrane fitted over then finished with raised seams aluminium roof material. The recommendation is to recess to the red line on the window which makes it quite a protrusion above the 150 mm upstand. I understand the rationale is for protection against ingress on the shallow/slow draining roof. My thoughts are we have 150 mm upstand and the windows are close to the top of the roof so is this overkill? We also live in a dry area, near Cambridge. Can anyone else who has a similar roof format with roof lights share information and photos of how theirs was fitted.
June 14, 20197 yr I think from memory the total protrusion should be 150mm, not the frame itself which is why it looks so high. They would probably be better fitted onto a 50x50 block but I would also be concerned about the cold bridge with that size upstand.
June 14, 20197 yr Sorry no experience in low pitch installation but that definitely looks to high, hope someone can help with the detail needed.
June 14, 20197 yr Who specced the install ..? According to the installers guide, a velux window should be red line flush with the roof surface with an EDE flashing. What was the purpose of the kerb..?? Handbook is here if you want a copy.
Create an account or sign in to comment