What PVA mix for cement boards

We’ve just had a media wall built using cement boards as we intend to apply brick slips on it.  Some of the boards were fitted with the ‘tile on this side’ reversed, so has a slightly rougher finish. What mix ratio of PVA should we use to prep it for the brick slips?

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  • FreeBear
    FreeBear Posts: 14,230
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    Personally, I'd recommend a primer such as BAL, or even SBR rather than PVA.
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  • longwalks1
    longwalks1 Posts: 3,701
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    Thanks FreeBear, only reason I said PVA was the website I ordered the slips from had PVA listed in their ‘accessories’ section along with adhesive, mortar and 10mm spacers etc
  • stuart45
    stuart45 Posts: 3,799
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    SBR is better than PVA in areas likely to get slightly damp. If you do use PVA, a mix of 3 or 4/1 water/PVA.
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