Ask a Tradesman
Are any roof types unsuitable for a velux window?
I'm having an extension built and agreed with the builder before the brickwork had commenced to take out the window in the new room and replace it with a velux roof window, which he agreed to. Now that the brick work and roofing has been finished we're being told that the roof is unsuitable for a velux window and we'll have to put a window in the wall instead (which will overlook the neighbours so is likely to cause planning issues). I've done some googling and can find no information on roof types that are unsuitable for velux windows - can you advise if it is possible that the roof is unsuitable, or is it just that the builder doesn't want to adjust the roof now that it's built. I'm frustrated because I'm not getting a lot of information and want to be sure on what is possible before signing off on the window alteration.
This is your builder who has forgotten that he was fitting a skylight and is now trying to get out of it.
Good luck Alex
Answered 17th Sep 2013
I take it no drawings were done for this work? This is the value of having professionally drawn plans and spec for builders to follow and ensures they do the job properly.
I take it the roof is pitched? Rooflights should only be used when the pitch is no less than 15 degrees. Other than that, there is no reason to use a rooflight no matter what the tile type is. You can also have rooflights in flat roofs which either have special 15 degrees turrents or flat with a plastic dome over.
Best provider of rooflights in my opinion is Velux - have a look at their website.
Sounds like your builder forgot to put rooflight in and now it's a right pain to change.
If the extension is single storey, then the window to the side won't be a problem although if its less than a 1m away from the boundary then the max size of window should be no greater than 1sqm to comply with building regulations.
Get your Building Inspector involved! You have the right to call them out, you're paying for their service and don't think it's just the builders domain. The VBCO will confirm if a window is acceptable and should help how you decide to proceed.
Answered 18th Sep 2013