How to install cement sheet over brick wall?

[poodsie]

Hi There, I’m looking to cover up an old brick wall in a bathroom with wet wall panels. To achieve an even surface, I was hoping to install cement sheets over the brick first and then waterproof that. I’ve been reading a few comments about brick needing to breathe so I was wondering if it would be ok to go straight onto the brick or whether I needed some timber battens or something similar to create airflow? It’s a small 2.3m wide internal wall.

It’s a small bathroom so I’d rather not reduce the space 

[MitchellMc]

Hi @poodsie,

Here's the Villaboard installation guide showing fixing requirements. Timber or steel battens are fixed to the brick, which allows you to pack them out to achieve a uniform surface for the boards. The minimum depth of the battens is 35mm, so face fixing 70 x 35mm timber would be the preferred option.

James Hardie does not recommend fixing directly to a masonry surface.

Please let me know if you have any questions.

Mitchell

[poodsie]

Thank you, Mitchell! Much appreciated.