Piedra Laja — Natural Slate and Flagstone in Costa Rica

Piedra Laja is Costa Rica's most versatile natural stone and the most humidity-resistant of the range — low water absorption and high mechanical strength.

Laja ranks first for humidity resistance among the natural stones we supply. On laja the weak point is never the stone, it is the grout: it stains before the stone does, and in very tight joints algae takes hold quickly. The money-saving answer is a rectangular format laid dry-stacked, with no grout at all — a full stone wall with nothing to stain or grow.

Typical uses: facades, walls, floors, pool surrounds and exteriors. Request a quote · installation guide · for architects & builders.

The range

22 Piedra Laja options

Grout and the dry joint

The grout is the weak point, not the stone. With Piedra Laja the problem is never the stone: it is the grout. It stains before the stone does, and in very tight joints algae takes hold fast. The answer that saves maintenance is a rectangular format dry-stacked (a dry joint), with no grout at all: a full stone wall, with nothing to stain and nothing for algae to grow on. See the installation guide and stone maintenance.

Frequently asked questions

What is Piedra Laja?

Piedra Laja is natural slate and flagstone, quarried in Costa Rica and supplied by Deco Rock cut to order. Piedra Laja is Costa Rica's most versatile natural stone and the most humidity-resistant of the range — low water absorption and high mechanical strength.

How does Piedra Laja perform in humidity?

Laja ranks first for humidity resistance among the natural stones we supply. On laja the weak point is never the stone, it is the grout: it stains before the stone does, and in very tight joints algae takes hold quickly. The money-saving answer is a rectangular format laid dry-stacked, with no grout at all — a full stone wall with nothing to stain or grow.

Is natural stone cheaper than manufactured stone veneer?

In Costa Rica, yes — natural stone is genuinely cheaper upfront than our manufactured stone veneer. Manufactured is the premium choice, bought for the design control and the matching corner pieces rather than to save money.

What formats and finishes are available?

Irregular, rectangular multi-use and thin veneer panel formats, in rustic or polished finishes. The stone changes character considerably with the finish, so ask for samples.

In short

Piedra Laja is Costa Rica's most versatile natural stone and the most humidity-resistant of the range — low water absorption and high mechanical strength.

Planning a project in Piedra Laja?

Send us the measurements and we will come back with a quote — flats and corner pieces priced separately.