Iceverge Posted December 31, 2023 Share Posted December 31, 2023 What's this building going to be used for? Link to comment Share on other sites More sharing options...
ColdOutside Posted January 2 Author Share Posted January 2 On 31/12/2023 at 16:50, Iceverge said: What's this building going to be used for? Office. Mearly a desk. Link to comment Share on other sites More sharing options...
Iceverge Posted January 2 Share Posted January 2 Ah you'll need some insulation then. 3 options. 1. Knock the wall and build the whole thing from scratch with a timber frame. 2. Use bricks to build the wall higher a d forget the timber frame. 3 Use your hybrid approach. For 2 and 3 I would put 50mm PIR internally, foamed and taped at the joints.Then a 22*70mm battened service cavity and plasterboard. Joining the wall PIR to 50mm (or more)PIR on the floor. Overlay with 2*11mm layers of floating OSB, joints staggered, glued and screwed. Link to comment Share on other sites More sharing options...
ColdOutside Posted January 3 Author Share Posted January 3 That’s pretty much the plan. Is the 70mm battens to allow a 20mm air gap? Link to comment Share on other sites More sharing options...
Iceverge Posted January 3 Share Posted January 3 7 hours ago, ColdOutside said: That’s pretty much the plan. Is the 70mm battens to allow a 20mm air gap? If you're willing to loose more space you could use 44*47mm battens @400cc for a service cavity and then infill with mineral wool. The 22*70mm is to create an uninsulated service cavity. (The stationary air will help insulation almost as much as insulation at narrow depths anyway) the reason for not using 22*44mm battens is they'll split from the plasterboard screws. Link to comment Share on other sites More sharing options...
ColdOutside Posted January 3 Author Share Posted January 3 Yeah not too much room so 70mm is about max. Using a osb finish internally not plaster board. Link to comment Share on other sites More sharing options...
gavztheouch Posted January 4 Share Posted January 4 You could add external insulation to protect the frame from wasps a little. Also an insect screen is useful. I’m using both, the insect screen also needs to be sealed top and bottom with stainless steel mesh Link to comment Share on other sites More sharing options...
Iceverge Posted January 11 Share Posted January 11 On 03/01/2024 at 18:22, ColdOutside said: Yeah not too much room so 70mm is about max. Using a osb finish internally not plaster board. 50mm PIR. 11mm ply ripped into strips for service cavity battens. 11mm OSB Finish. 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