Hi all I'm fitting three roof lights into a new pitched roof. Lots of connections to other walls so going with a GRP roof covering.
I aimed to put in a velux rooflight but the website doesn't show any installation details for a warm roof, and really I think all new roofs should be warm these...
I'm nocking though into what was an old outside toilet, the two are separated by a solid brick wall. Sent this info off to an SE to get the steel specified and they came back with 178 x 102 mm UB. It's cranked, so a bit more complicated than the standard.
Do you think they missed that it was a...