I figured out how to correctly splay the reveals on my Velux roof windows, so I thought I would share it. Lot's of people think it's all down to the plasterboard but if it's not framed properly then you will never be able to splay the plasterboard. My method looks to be ideal for using in conjunction with the Velux LSG kit but I think I might have other plans.

With the correct splays you get more light. Incorrectly splayed reveals can trap warm air and lead to condensation.

It seems 99% of tradesman don't splay their reveals and I'm surprised there's no information out there on how to do so. I've only ever seen one picture where a tradesman tried to do it but angled the actual trimmers themselves (although they wasn't vertical and horizontal) and it all looked abit wrong.

It's always a good idea to order your windows before you frame your roof. I had already put in my rafters beforehand. So I worked with what was there for my doubled rafters rather than trying to move them. This will mean that I won't be able to use the sides of the insulation collar and will probably use abit of spray foam. We shall see what happens when I actually fit them and insulate everything.

0:00 intro
2:55 how to figure out where to place velux roof window
8:53 know how to place and lay out trimmers for splayed velux roof window
12:52 cutting rafters and framing out for a splayed velux roof window

#roofwindows #velux #howto

About me:
I'm Aiden and I'm documenting what was supposed to be my barn conversion, which has now ended up being a new build. I don't have a trade, I just have a go and I'll be doing lots of work myself. This is the boring bit in grand designs that you don't get to see. Subscribe and follow along to find out how our future home turns out