S
saabnut
I've bought some 12mm dukkaboards high density extruded polystyrene core boards with glass fibre cement on both sides. Their web site say to screw the boards to the walls with washers but I've not seen any washers that I can buy on line. I've seen videos online where they just screw the boards with out washers but feel they need washers as the boards are soft inside. Please could someone advise where to get washersand the best way to fix the boards to the wall. Thank you.
