Insulation (under the membrane) – Can lead to leaks or even premature failure of your entire roofing system. When the roof insulation shrinks, curls, or cups it results in membrane attachment problems.
Flexible Wall Flashings – Theses flashings can result in leaks if they slide off the wall.
Penetrations – Penetrations usually occur from lack of maintenance (and in many cases manufacturers will void warranty if the roof has not been properly maintained).
Metal Flashings – Flashings can leak at the joint, or because of rust. If the flashings were installed improperly they can also cause leaks.
Blisters – blisters in the membrane form due to moisture vapor within the roofing application. The blisters can open due to traffic, and result in leaks.