Maintaining decorative stone cladding in Costa Rica

Looking After Decorative Stone in a Tropical Climate

Manufactured veneer needs essentially nothing. Porous natural stone needs a little, done right and done early. The difference matters more than most people expect.

Manufactured veneer: no maintenance

Deco Rock manufactured stone veneer is cast dense and engineered for this climate. Installed correctly it lasts a lifetime with no maintenance and no resealing.

Hotel Crocs, Jacó is the proof point we point people to: a beachfront tower clad to order, over ten years in, with no maintenance and no resealing. The stone covers the first six floors — so those floors have never needed repainting, which in a coastal hotel is a substantial recurring saving.

Natural stone: seal it properly

Porous stones — coralina and mollejón above all — need a penetrating sealer as a base and then a topping sealer to close the surface pores. Reapply periodically.

Do not economise here. On mollejón the sealer can cost close to what the stone cost, and it is the single thing that determines whether the installation still looks good in five years.

The pressure washer warning

Clean early, lightly and from a distance, at the first sign of buildup.

Waiting until staining is severe forces an intensive close-range clean — and on porous stone that lifts the sealer and opens the pores, which makes the next round worse. Light, distant, early maintenance means you never reach that point.

For routine cleaning, water and a soft brush is usually enough.

Grout and algae

On porous stone the grout stains before the stone does, and tight joints grow algae fast in this climate. Where the design allows, dry-stack a rectangular format and skip grout altogether.

For projects buying veneer from us we also make custom-coloured grout to order, and we sell mollejón powder to mix your own grout with cement — considerably cheaper than bagged pre-coloured grout in Costa Rica.

Frequently asked questions

Does manufactured stone veneer need sealing?

No. It is cast dense and engineered for the climate — installed properly it lasts a lifetime with no maintenance and no resealing.

How often should natural stone be resealed?

It depends on exposure and traffic. A good topping sealer over a penetrating base lasts a few years on mollejón; reapply when water stops beading and the surface starts absorbing.

Can I pressure-wash decorative stone?

Lightly, from a distance, at the first sign of buildup. Aggressive close-range washing lifts the sealer and opens the pores, which does lasting damage to porous stone.

How do I stop the grout from staining?

Dry-stack a rectangular format where you can, so there is no grout. Otherwise use a good-quality coloured grout and seal the wall as a whole.

In short

How to clean and seal decorative stone in Costa Rica, what not to do with a pressure washer, and why manufactured veneer needs no maintenance at all.

Need sealing advice for a specific stone?

Tell us which stone and where it is installed and we will tell you exactly what to use.