Our ferrocement/meshcrete roof during the application of the sealing agent. This elastomeric coating provides a one-piece, waterproof roofing surface which, in theory, leaves nowhere for the rain to get in. In theory... An additional bonus is the presence of highly reflectant substances in the sealantwhich are intended to bounce sunlight - and heat - off the roof. This DIY Labor O' Love can be seen in its raggedly righteous but completely paid for glory at: http://www.texasmusicforge.com/gimmeshelter.html Tio Ed El Rey de Sweat Equity