I'm building a chimney breast from non-combustible materials. I've got a metal C-stud frame but I'm looking for some board to screw to it, before finishing with a high temp. plaster. The only board I can find is Promatect 250 which I can't find stocked anywhere near London (incl. Wickes & B&Q). I only need 1 8'x4' sheet, and it looks like I'll end up paying £40 delivery for 1 £30 sheet.
Are there any alternatives?
Are there any alternatives?