Replacing the felt on your flat roof is not a job for everyone, but anyone can do the job by following a few simple directions. The most important concept in replacing your roof felt is making sure the base is in great condition. If your decking material isn’t of the highest quality, no amount of felt is going to make your roof waterproof and strong. Follow the instructions carefully and you will soon have a roof you’ll be proud to show off.
7 When laying down your layers of felt roll out about 1 metre so that you are only working on a small area at a time. After laying down a top layer of roof felt make sure that the overlap is secure by painting more adhesive over the top. Adding loose chipping material to your final felt roof prevents the surface from absorbing the sun. Make sure your shoes are free from sharp edges that would cut or damage the just laid felt. Only use nails on your first layer of roof felt. The subsequent layers of felt are secured by adhesive only.
Nail the first layer of felt to the plywood using 20mm galvanised clout nails with large heads spaced every 150mm along the planks. Make sure the felt is straight and flat. Always start nailing in the center of the felt sheet working your way outward towards the edge of the roof. Do not nail on the edge of the roof where the second layer of felt will overlap the first.