Recent content by mrmoose

I had considered the self support system but there is a need to access a window above so in terms of supporting weight with crawl boards I think the joist option is better. The actual cost of the joists is an extra £80 if I went for the 4/500mm centres

Catlad not sure what you mean, are you talking about noggins between joists from side to side ? I was going to space joists at roughly 400/500 centres but wondered if I needed to use so many when the polycarbonate sheets are 1080 wide ! But still using noggins side to side spaced approx a metre...

Hi I am building a 4m deep 2.2m wide conservatory with 45x145mm C16 joists on top of which I am putting on 25x1080mm Polycarb sheets, can you tell me if I need intermediate joists ? eg at 550mm centres or just noggin supports ? Any advice would be great