Hi,
We are getting conflicting advice so any thoughts that might help us get through this very much appreciated.
We are building a 4m deep x11m long single story extension on the back of our house, mono-pitched roof joined to the exiting house. Due to the lay of the land and upper story windows we are limited for height at the back/house side (3m) and still want to achieve a fall above 5 degrees.
There are two questions this raises.
1. One installer recommended a vented or cold roof zinc installation (something to do with moisture trapped during installation of the zinc) where as our design/architect guy recommended a warm roof i.e. unvented. Has anyone got views on which is better and/or any advantages of each?
2. If we were to go down the vented route. I have been unable to see how the back/house side of the venting would work and upstand for that matter. I have seen venting details on roof ridges. Has anyone got any experience of how that might work?
Again any help much appreciated.
Thanks
Graeme
Extension 26-01-21 - Drive side view.tif