Technique & materials
What stone carpet is and what it is made of
Stone carpet, also known as resin bound gravel: what it is, what it is made of (aggregate + resin) and why it drains. Explained by specialists in Valencia.
You have a patio with cracked or faded tiles, but the mere idea of breaking up the floor —rubble, days of works, dust all over the house— puts you off. It is the reason so many people put up with a patio they no longer like. Stone carpet (or resin bound gravel) solves exactly that: in many cases it is applied over the floor you already have, without lifting it. Here we explain when it is possible, when it is not, and what you gain compared with starting from scratch.
The problem: the old patio and the fear of building works
Lifting an existing tiled floor is the expensive, slow part of a patio renovation. You have to break up the tiles, remove the rubble (which is heavy and costly to manage), repair whatever appears underneath and re-tile. Weeks of works, dust and a budget that spirals. That is why many patios still have tiles from the eighties or porcelain that is slippery and heats up: the cost of changing it does not justify the result.
The solution: applying over the existing substrate
Stone carpet is applied over your current floor —tile, porcelain, terrazzo or concrete— when the substrate is in a condition to receive it. Instead of removing the old, it is prepared, primed and the aggregate is spread with resin on top, forming a new, seamless, permeable surface without touching the structure.
The key is that the substrate be suitable. Broadly, the industry requires the existing floor to be:
- Sound and well bonded: with no hollow, loose or rattling tiles.
- Free of active cracks or structural movement (a crack that is still working would show through at the top).
- Free of damp underneath: unresolved damp would end up affecting the new surface.
- With a fall or a way to drain: stone carpet drains, but the water needs a point to go to.
Valid cases and cases that are NOT
| Your patio’s situation | Can it be applied on top? |
|---|---|
| Old tiles but sound and well stuck | Yes, usually an ideal substrate |
| Porcelain that is slippery or heats up, in good condition | Yes, applied on top to gain grip and comfort |
| Sound concrete or terrazzo | Yes, a common substrate |
| The odd loose tile or isolated crack | Usually yes, repairing that area first |
| Hollow tiles across much of the surface | Not directly: the affected area has to be made good or broken up |
| Active damp underneath | No, until the source of the damp is resolved |
| A floor with no fall or drain at all | The fall has to be corrected first |
Advantages on a patio
Beyond avoiding the building works, the finish itself fits a Valencian patio very well:
- It does not burn in the sun: light-toned natural aggregate does not store heat like dark porcelain or concrete, so you can walk on it barefoot in high summer.
- It drains rainwater and irrigation water instead of leaving puddles.
- No joints: easy cleaning and none of the lines where moss appears and dirt gathers.
- Seamless and made-to-measure colour: it visually unifies the patio and you choose the tone of the aggregate.
- Less building work: less rubble, less dust and, usually, fewer days than breaking up and re-tiling.
You can see the detail in the patios and outdoor areas section and understand the technical why in what stone carpet is.
When you DO need to break up or repair first
Applying over the existing floor is not magic: if the substrate fails, the new surface inherits the problem. You have to act first when there are hollow or loose tiles across much of the surface, active cracks, unresolved damp or a total lack of fall. In those cases the affected area is made good, repaired or, if there is no other way, broken up before applying. We would rather tell you so on the visit even if it means more work: applying over a bad substrate is throwing money away.
Timescales in general terms
A renovation without lifting the floor is, by definition, faster than breaking up and re-tiling, because you save the demolition and the rubble removal. The actual time depends on the area, the state of the substrate and the curing times of the resin between stages. We do not give a fixed number because every patio is different.
Frequently asked questions
Do you really not have to break up the tiles?
In many cases no: if the floor is sound, free of damp and well bonded, it is applied on top. It is only broken up when the substrate is not in good condition. We confirm it on the visit.
How many days does it take?
Less than a renovation with demolition, but it depends on the metres, the state of the substrate and the curing times between coats.
Does it raise the floor level much?
The system is a thin layer of aggregate and resin, far less than adding a new slab and tiles, so the change in level is small.
Does it withstand frost and the outdoor sun?
Yes: as it drains and does not hold water, it copes well with frost, and stability in the sun depends on the type of resin (aliphatic ones do not yellow). We detail it in maintenance and durability.
Can I choose the colour?
Yes: the colour and grain size of the aggregate are chosen according to the finish you want, within the available range.
Does it also work for a pool edge?
Yes, it is one of its star uses. We look at it in the best paving for a pool edge and in the pools section.
Give your patio a new life without building works. Tell us what your current floor is like and we will tell you honestly whether it can be applied on top. Tell us what it is like.
