We currently have an old Felt roof on our house which is dipping in places and decided to replace the roof with a GRP roof. We hired a roofer/builder who quoted to strip existing felt, re-fir, re-deck, and install GRP system to the entire flats roof.
When looking at the work done so far, I noticed the following:
1) The old felt was not completely removed but the firring/plywood was laid on top of the old felt (builder claims he removed the top layer)
2) We agreed to lay new firrings, the builder said the laid 4 inch of fall over approximately 10 meters (length of roof). Is this sufficient?
3) The plywood looks like ordinary plywood rather than Weather proof plywood or OSB - can this cause any issues with movement/moisture?
4) There is a noticeable dip in the middle of the roof which looks like there will be some puddling ... Is this normal/acceptable or can I assume there will be problems in the future?
Any thoughts? The builder has so far completed the decking and the first layer of resin...
When looking at the work done so far, I noticed the following:
1) The old felt was not completely removed but the firring/plywood was laid on top of the old felt (builder claims he removed the top layer)
2) We agreed to lay new firrings, the builder said the laid 4 inch of fall over approximately 10 meters (length of roof). Is this sufficient?
3) The plywood looks like ordinary plywood rather than Weather proof plywood or OSB - can this cause any issues with movement/moisture?
4) There is a noticeable dip in the middle of the roof which looks like there will be some puddling ... Is this normal/acceptable or can I assume there will be problems in the future?
Any thoughts? The builder has so far completed the decking and the first layer of resin...