Hi all. Everything else question. I have a flat roof kitchen extension. Whenever it rains hard coupled with the wind it starts to leak a little from the roof. I've tried explaining to local tradesmen about rubber flat roof covering we use in Europe . Is it called EPDM? Anyway when mentioned they all just look bemused. So is it called something else in Thailand? Is it available from homepro ect? Any advice would be greatly appreciated.