March 10, 2026 · 5 min read
Can you put microcement over existing tile?
Yes, usually. It is the single most common reason people choose microcement for a bathroom renovation, and it changes the economics of the whole project.
Why it matters so much
Removing tile is loud, dusty, slow, and expensive. It often damages the substrate underneath, which then has to be repaired before anything new goes on. Demolition also produces a skip and a house full of dust.
Going over the top skips all of it. No demolition, no dumpster, and in most cases no extended period without a usable bathroom.
What has to be true first
Every tile has to be firmly bonded. We tap the whole surface listening for hollow spots, and any loose tile comes off and gets made good.
Grout lines have to be filled and the surface flattened, because microcement is thin enough that a grid of grout lines would ghost through it. A reinforced base coat goes over the whole area to bridge the joints and absorb minor movement.
When it is not the right call
If the tile is failing, if there is movement in the substrate behind it, or if there is active moisture getting in from somewhere, going over the top just hides a problem that will resurface.
If the existing waterproofing in a shower has failed, that has to be addressed properly first. Microcement is water resistant, but it is not a substitute for correct waterproofing behind it.
In short
Sound tile is a good substrate. Failing tile is a problem to fix, not to cover. We can tell which you have in one visit.
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