Flexible Stone Installation
Installing Flexible Stone Over Existing Surfaces
When flexible stone can go over tile, render, paint or board — and when the old surface has to come off first.
Overview
One reason flexible stone suits renovation is that it can often be bonded over sound existing surfaces without demolition. “Often” is the operative word: the result depends entirely on what the old surface is, how well it is attached, and how it is prepared. The rule is simple — the panel is only as secure as the layer it is bonded to.
Key steps
01
Assess what is already on the wall
Tap tiles for hollow sounds, check render for cracking or dusting, and test paint adhesion with a cross-cut or tape test. Any layer that is loose, hollow, powdery or peeling must be removed or mechanically stabilized — bonding over a failing layer transfers its failure to the new finish.
02
Clean and degrease
Kitchens, bathrooms and commercial walls carry grease, soap film and release agents that defeat adhesives. Wash with a suitable degreaser, rinse and let the surface dry fully before any primer or adhesive.
03
Level and prime
Deep grout lines, tile bevels and uneven render telegraph through thin panels. Skim or fill to an even plane, then apply the primer recommended for the adhesive system on glazed or low-absorption surfaces.
04
Choose the adhesive for the substrate, not the habit
Glazed tile, painted plaster and cement board each need a different adhesive class. Confirm the combination of panel, primer and adhesive with the supplier for the actual surface — a small test area saves a large failure.
When to strip instead of covering
Remove the old finish when tiles are widely drummy, render is soft or damp-affected, wallpaper or flaking paint covers the area, or the added build-up would foul frames, sockets and edges. Covering is a time-saver only when the base layer is genuinely sound.
Moisture and movement
Existing damp problems do not disappear behind a new finish — fix the source first. At movement joints and transitions between different old materials, carry the joint through the new finish rather than bridging it.
Frequently asked questions
Can flexible stone go straight over bathroom tiles?
Often yes, if the tiles are firmly bonded, degreased, primed and paired with the right adhesive — and the wet-area suitability of the chosen series is confirmed first. Hollow or damp-affected tiling should come off.
Do I need to remove old paint?
Sound, well-bonded paint can usually be sanded, cleaned and primed. Flaking, chalking or glossy unprepared paint is a bond breaker and must be treated or removed.