I have a pitched roof with plain tiles set on battens which are on counter battons which inturn sit on close boarded chipboard which has a coating of bitumen to make it waterproof. There is no felt underlay. There are a few patches where water has got into the chipboard and a valley is leaky. I want to replace the valley with a GRP one and the damaged boards with OSB but thought I would strip all of the tiles and felt the roof. Should I put the felt straight over the bitumised chipboard and OSB sections or on top of the counterbattons? Am I OK to use non breathable felt? It is a cold roof so all the reading I have done so far suggests that would be OK.
pitched roof problem
- Thread starter bramblefly
- Start date
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Yes but there are two sets of battons. ones running up and down the roof (immediately on top of the boards) and ones above them running horizontally along the roof. Which set of battons should the felt be under? (Confusion may have arisen because I'm not sure if I used the term counterbattons correctly - Sorry)
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