Hello, I have been insulating a single brick garage, stud work, semi pearmeable membrame 140mm of fibre glass wool and then a non peameable membrame. Everything has went well however the non pearmeable membrane I bought is plastic bag thick. I have managed to fall into it a couple of times, rip it and staple the life out of it. Can I use much thicker DPC which is way easier to handle, cut staple etc, or is there a reason I cant ? Many thanks Mark