Hi thanks for info sounds like a better option than grp what depth of shingle would be needed ? I would have pref a mechanical method but that will stop expansion? Will that matter with epdm? Seems to be turning into bit of an epic! TIA jg
Hi Im new to forum so any help greatly appreciated. Plan is to lay 100 pir over ex ground floor felt roof 12'x8' (cracked but not yet leaking), then new osb deck folowed by grp system. Do i need to fix new osb through pir (using long screws into ex joists) as this would seem to stop any expansion ta...