Hi,
I'm an enthusiastic DIYer and I've just started my first project that involves some roofing. I'm building a small lean-to type extension with a fairly shallow pitch roof which I intend to slate with Marley Eternit slates. The basic roof structure is covered with OSB; 1) to tie everything together and 2) to provide a safe working platform whilst finishing the roof. I read that a breathable membrane should be used for the undersarking and that nail tape should be used under the battens to prevent the holes caused by the batten nails becoming potential leak points. You will have to excuse my DIYers naivity but here is my problem.... With a flat deck (OSB) and the battens effectively sealed to the breathable membrane by the nail tape won't any rainwater which found its way under the tiles due to extreme weather conditions just sit behind the battens having no way of running off? Any advice would be appreciated.
I'm an enthusiastic DIYer and I've just started my first project that involves some roofing. I'm building a small lean-to type extension with a fairly shallow pitch roof which I intend to slate with Marley Eternit slates. The basic roof structure is covered with OSB; 1) to tie everything together and 2) to provide a safe working platform whilst finishing the roof. I read that a breathable membrane should be used for the undersarking and that nail tape should be used under the battens to prevent the holes caused by the batten nails becoming potential leak points. You will have to excuse my DIYers naivity but here is my problem.... With a flat deck (OSB) and the battens effectively sealed to the breathable membrane by the nail tape won't any rainwater which found its way under the tiles due to extreme weather conditions just sit behind the battens having no way of running off? Any advice would be appreciated.
.
