Lining concrete block walls

[sidinz]

If I wanted to put gib up on an internal concrete block (dividing) wall, do I need to put anything between the painted blocks and the gib sheets?

Also, what is the advised method of waterproofing an external concrete block wall before gibbing it?

[Psilan]

I'm curious about this also, so I Googled.

http://gib.co.nz/assets/Uploads/Installation-to-Walls4.pdf

[eri]

^ nice find

[heugumper]

I am not sure how you go about proofing external concrete (plenty of waterproof coatings in paint shops) but internally why use anything. I am just renovating a duplex and my side of the internal block wall is just plastered. Has lasted well. Is there a need?

Paul.

[Mr Stu]

If the wall is below ground, it needs to be coated on the outside by a waterproof compound such as black seal (bitumen) or similar. If this hasn't been done you can paint a product on the inside that resists hydrostatic pressure, or water pressure coming in from outside (I have had Zinsser watertite recommended to me). Otherwise if the wall is above ground, then just painted on the outside should be sufficient.

I've heard that it is not recommended to line gib straight on to an external masonry wall, but the above article seems to say it is ok if it is painted/sealed ok on the outside.

[DaveW]

Better to use battens so that the finished wall.. a) sounds normal when someone taps on it; b) someone can screw into it to hang stuff, without going through concrete block; and c) power points etc can look normal along the wall.

[Wayne]

c) power points etc can look normal along the wall.

would need to be much deeper battens for a power point to 'look normal'.

[DaveW]

would need to be much deeper battens for a power point to 'look normal'.

No need. My electrician managed it.