Insulating stud wall between garage and house
- Thread starter BarnabyT
- Start date
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The last stud wall we built as per BR betwixt a garage and habitable as follows:
Inside to out..
12.5mm foil back plasterboard.
18mm ply (optional).
100mm stud wall.
100mm Celotex between studs, all joints foil taped.
50mm Celotex across studs (externally) all joints taped.
2 layers 12.5mm fireboards.
Filling between studs alone won't cut it. You need another layer across the studs to prevent shadowing (cold bridging). This can be fitted internally or externally.
Inside to out..
12.5mm foil back plasterboard.
18mm ply (optional).
100mm stud wall.
100mm Celotex between studs, all joints foil taped.
50mm Celotex across studs (externally) all joints taped.
2 layers 12.5mm fireboards.
Filling between studs alone won't cut it. You need another layer across the studs to prevent shadowing (cold bridging). This can be fitted internally or externally.
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Not by the looks of things!
Super-insulated block? Send me a brochure.
Insulated Cavity wall with a foundation? I think not.
Last edited:
It stuck proud by about 5mm. Didn't matter as there was another layer going on top prior to the boards being fixed.
One layer fireline will be fine. We did two and cross jointed because the customer wanted max sound block.
Lol. Should have used acoustic board then.
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