With the purchase of a house I have inherited a low pitch roof. According to plans, the pitch is 10.5 degrees. The construction is a warm roof (ply on top layer), then monarfoil underlay, then battoned and counter battoned, then concrete interlocking tiles.
The problem I have is that water gets behind the tiles during heavy rainfall. I recently had a leak on the eaves which I fixed but noticed that lots of the batons are rotting and the ply beneathe the monarfoil is wet - I assume through 'sweat'.
I don't really want to fork out for a new flat roof as it's quite big (36m2). I am planning on re-battoning the roof and using a breathable underlay. My question is, will the breathable underlay be water resistance enough considering the low pitch of the roof?
I was planning on battoning, then underlay, then counter battoning. Is this correct?
Thanks
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Underlay for low pitch roof
in Roofing
Posted
Hi,
With the purchase of a house I have inherited a low pitch roof. According to plans, the pitch is 10.5 degrees. The construction is a warm roof (ply on top layer), then monarfoil underlay, then battoned and counter battoned, then concrete interlocking tiles.
The problem I have is that water gets behind the tiles during heavy rainfall. I recently had a leak on the eaves which I fixed but noticed that lots of the batons are rotting and the ply beneathe the monarfoil is wet - I assume through 'sweat'.
I don't really want to fork out for a new flat roof as it's quite big (36m2). I am planning on re-battoning the roof and using a breathable underlay. My question is, will the breathable underlay be water resistance enough considering the low pitch of the roof?
I was planning on battoning, then underlay, then counter battoning. Is this correct?
Thanks