Hi,
I'm constructing the roof on my ongoing single story extension on the back of my house.
The rafters are in place & have turned out to be at 19 degrees, this is due to window height. I believe that there's a difference between rafter pitch & tile pitch but I'm not sure how much this will change the pitch or if the tile specifications take this into account?
The tiles for the roof will be Marley Wessex that go down to a 15 degree pitch.
I'm wondering if it's a wise step to use sarking boards on the roof or would an increasing the headlap to 100mm be ok?
What do you think?
Thanks.
I'm constructing the roof on my ongoing single story extension on the back of my house.
The rafters are in place & have turned out to be at 19 degrees, this is due to window height. I believe that there's a difference between rafter pitch & tile pitch but I'm not sure how much this will change the pitch or if the tile specifications take this into account?
The tiles for the roof will be Marley Wessex that go down to a 15 degree pitch.
I'm wondering if it's a wise step to use sarking boards on the roof or would an increasing the headlap to 100mm be ok?
What do you think?
Thanks.