MikeGrahamT21 Posted April 10, 2020 Share Posted April 10, 2020 Hi, Small lean to roof, 2.4m projection with a 22.5 degree angle with 2 roof lights in and concrete tiles, what size timbers are required these days? I'm thinking either 47 x 175 or 47 x 200 and doubled up around the roof lights? Just in middle of doing my plans for building control. Regards Mike Link to comment Share on other sites More sharing options...
PeterW Posted April 10, 2020 Share Posted April 10, 2020 150x47 C24 at 600 centres is fine. Insulation will be your biggest issue though - you may have to go up to 200x47 for the depth required unless you use PIR between and below the rafters. Link to comment Share on other sites More sharing options...
MikeGrahamT21 Posted April 10, 2020 Author Share Posted April 10, 2020 Yeah was thinking to use some insulation below the rafters, as it’ll cut down thermal bridging too. ill do some calcs for the insulation and see what works best. thanks for the info, I’ll get it on the plans ?? Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now