Single ply roofing is a roofing method which is becoming more widely used in developed countries. The material is made from thermoplastics or synthetic rubbers. The main difference of single ply membrane compared to traditional ways of roofing is the flexibility.
Repairing a roof can take on all sort of forms. Depending on your problem there will be different practices to fix your problem. Often it is best to leave the roof repair to a qualified roofer. Unless you have experience in roofing, we discourage you from climbing up on the roof and trying to fix it.