lead dormer

tommystout · 8 Nov 2010

Hi
this is a first post for me , i hope you can help.
I am wanting to make a lead dormer. The roof will be of a very shallow pitch. Lead sheet assoc says that they prefer a vented warm roof. Question is
how big should the clear vent be? is 25mm adequate?
Also while i am on, i am providing lead cheeks to the dormer, should these be vented too, it isnt at all clear on any website i have been on?
Many thanks

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lead dormer

tommystout

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