23 March 2016 #1 T tammy42 Member Joined 27 September 2015 Messages 26 Visit site Hi re constructing outdoor school......no membrane, single membrane or two membranes. I am getting constantly different advice on this! Can someone advise me please?
Hi re constructing outdoor school......no membrane, single membrane or two membranes. I am getting constantly different advice on this! Can someone advise me please?
