stud wall in garage

[livi150]

guys, I'm planning on dry-lining my attached garage by building stud walls and using plasterboard to finish it off.

my question is that one of the walls is a single skin wall built with blocks and rendered on the outside.

I know I need to use some sort of membrane, but I am looking for advice with regards what kind to use and where to put it. and do i only need to use it on the one wall that is single skin, the others are a cavity.

i will be filling in the gaps in the stud wall with kingspan insulation.

 

[freddiemercurystwin]

Untitled

• freddiemercurystwin
• 18 Jul 2010
• 7

If the cavity walls are dry then they won't need a membrane.

Though instead of RIW something like this may be as effective. http://www.wickes.co.uk/Wickes-Bitumen-Based-Damp-Proof-Membrame-Liquid-5L/p/241217

Only once over the years has Building Control questioned this method.

 

[livi150]

here is a drawing of what i was planning



the blockwork wall is dry and sound, there are also 2 high level air bricks and 2 low level ones.[/img]

 

[matz]

I drylined our garage when I converted it. used 4" studding and 100mm celotex wedged inside the studding then foil backed plasterboard. No membrane but I did bitumen (or similar) coat the single skin wall. All the work was done under building control - from memory I dont think they specified bitumen coat I just did it as a kind of belt and braces job.