Hi,
How does BS5534 work for a flat roof running into a pitched roof (such as at a dormer). NHDB 72. S12(e) says run the flat roof up the pitch for 150mm in height (262mm at 35 deg), and provide a tile bottom support at ~150mm into the run, under the felt. But BS5534 says edges are double fixed which for eaves would be an eaves clip and nailed. Nailed still works ok but the eaves clip would no be nailing through the flat roof membrane which doesn't sound the best idea :-/.
Any suggestions?
I'm thinking that maybe the flat roof membrane should run up the pitch, the roof felt over lap this as normal (maybe sealed too). And then tile batten fixed over the flat roof membrane. I would need to either drape the flat roof or raise the batten to allow water to go under it. Standard tile clips would then work. I could put a bit of sealing tape between tile batten and rafter to seal the nail hole in the flat roof too. Being under compression by the tile batten that should be a good seal. The drape might be tricky though as my flat roof is epdm. Maybe a plastic wedge?
Any other ideas?
How does BS5534 work for a flat roof running into a pitched roof (such as at a dormer). NHDB 72. S12(e) says run the flat roof up the pitch for 150mm in height (262mm at 35 deg), and provide a tile bottom support at ~150mm into the run, under the felt. But BS5534 says edges are double fixed which for eaves would be an eaves clip and nailed. Nailed still works ok but the eaves clip would no be nailing through the flat roof membrane which doesn't sound the best idea :-/.
Any suggestions?
I'm thinking that maybe the flat roof membrane should run up the pitch, the roof felt over lap this as normal (maybe sealed too). And then tile batten fixed over the flat roof membrane. I would need to either drape the flat roof or raise the batten to allow water to go under it. Standard tile clips would then work. I could put a bit of sealing tape between tile batten and rafter to seal the nail hole in the flat roof too. Being under compression by the tile batten that should be a good seal. The drape might be tricky though as my flat roof is epdm. Maybe a plastic wedge?
Any other ideas?
