How to felt a shed � part 1 of how to felt a shed deals with how to strip old felt from a shed roof without damaging the roof or trims in the process. fitting felt to a shed � part 2 gives instructions on how to fit roofing felt to a shed roof, cutting, nailing, gluing and replacing wooden trims afterwards.. Watch our step-by-step video showing how to felt a shed roof, with expert advice and top tips to help you complete the job with confidence. visit the official b&q youtube channel.. I replaced the felt on my shed yesterday, using homebase felt (