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Prepare & clean a bathroom for tiling


Before you start tiling, ensure you’ve picked your bathroomware and chosen where it will go in your bathroom. Changing your plumbing fixtures becomes much more difficult after you start tiling!

Any tiling job will only be as good as the surface it’s laid on. It’s important to ensure that, no matter what surface you’re tiling on, the surface is sound, level and clean of dust and debris. Most floor surfaces are concrete or timber, while plasterboard is common for walls. Concrete: For best results, the concrete must be allowed to cure for a minimum 28 days before it is tiled over. Steel trowelled concrete must be mechanically roughened (and then thoroughly washed) prior to tiling or there will not be enough adhesion. All concrete release agents and curing compounds must be removed by mechanical means. For cracks larger than 1.5mm consult your local suppliers. Timber flooring: Due to the normal expansion and contraction of the timber, it is never recommended to adhere ceramic tiles directly onto timber floors. Untreated floors should be primed and allowed to dry prior to tiling. Plasterboard: Plasterboard is a very common indoor wall surface, but is not suitable for tiling without waterproofing. Tiling over plasterboard involves adhering tiles to a paper surface, and although this will present little problem in dry areas, if the wallboard is subject to moisture it may deteriorate causing failure. Plasterboard should be waterproofed before tiling. Information on other types of wall and floor surfaces can be found on the Tiling Wall and Floor Surfaces page on our website.

Prime the surface for tiling Use a primer with a sponge or roller to prime & prepare all surfaces that are to be tiled. We are using Ardex MultiPrime which is a water-based primer.

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Bathroom prep  

Bathroom prep