Any roof experts

[Bugsy]

I'm ready to roof my run and am using glass-fibre corrugated sheets.
I have to work in an 'L' shaped section that will fit under the existing roof section and am not sure if it will be better in one piece or two. My rough sketch hopefully shows what I'm on about.

Cutting in one-piece will obviously be harder to do.

Any advice would be grateful before I start cutting.

 

[rick]

Cutting big, fragile sheet is usually easy enough with plenty of level tressels to support it. It's moving it into position that can be difficult. As long as you design a cap over the join there's no reason why 2 pieces shouldn't be as good as 1 I think and you will be able to replace the smaller sections if they get damaged.. That's my take on it.

 

[dinosaw]

I'd agree with Rick, I always use corrugated bitumen but I assume that you can do the same with fibreglass and just do a two corrugation overlap to join the sheets together.

 

[Bugsy]

Thanks Rick, I've had a go and managed to do it in one piece.

I drilled a hole in the corner before cutting to relieve any stress and, going very slowly, it actually was not too difficult to do.

I used a thin diamond=coated tile cutter in an angle grinder cutting halfway through when going across the undulations and then turning it over to cut through the remainder.

With a mask and goggles, of course, cutting this stuff is not healthy

edit:
Thanks DS, I used bitumin sheets on the carport for our caravan, much easier to cut than this stuff 17