Not the felt you need to worry about its the tiles above. Roofing felt, despite peoples (and some builders!) ideas, is not for waterproofing, its a vapour barrier which stops warm air from the loft hitting the cold tile surface and condensing. It also acts as a dust barrier stopping the dust from outside getting into your roof space. Get the leak fixed in the roof first.
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!