How Custom Artificial Rock Is Built: Framework, Sculpting and Color
What custom artificial rock is
Custom artificial rock is concrete that is shaped, textured and colored to look like natural stone. Instead of searching for boulders in the right size and hauling them to your property, the rock is built in place, so it can follow the edge of a pool, wrap around a spa or rise into a waterfall. Artificial Rock Contractors has designed and built artificial rock for over two decades, for homes and commercial properties across San Diego, Orange and Riverside Counties.
Why build rock instead of moving boulders?
Natural boulders are beautiful, but they come with limits:
- You are limited to the shapes and sizes you can find and deliver.
- Matching colors across many stones takes time and money.
- Heavy stone has to be hauled and set with equipment.
- Boulders are hard to adapt to pools, slides, caves and overhangs.
Built rock can take almost any shape and size, is less dense than natural stone, and is colored to complement the surrounding landscape. It also avoids much of the environmental impact of quarrying and transporting rock. For a fuller list, see seven advantages of artificial rock.
How the rock is built
1. A steel framework
Every feature starts with its structure. The basic form is built on a steel rebar framework, which sets the shape of ledges, overhangs, caves and waterfalls and gives the finished rock its strength.
2. High-strength concrete
High-strength concrete is applied over the framework and built up to the thickness the design needs. The result is lighter than solid stone, yet substantial and strong.
3. Sculpting and texture by hand
While the concrete is workable, the rock is carved by hand: fractures, layered strata, weathered edges and the surface texture of the stone being imitated. This hand work is where realism comes from, and it is how we replicate stone such as sandstone, blue granite, limestone and basalt.
4. Color
Color is what makes artificial rock believable. Our coloring layers an average of 10 earth-tone colors on a project, each adjusted individually, so the rock reads as natural stone rather than a single painted surface.
Where built rock is used
- Rock pools: rock edges, faux-rock coping, caves, ledges and jump rocks.
- Rock slides: straight or curved runs built into the rockwork.
- Waterfalls: from small cascades to falls 6 to 100 feet tall.
- Water features: ponds, fountains and grottos.
- Commercial rockwork: hotel and resort pools and landscapes.
Planning a project
Every project follows the same path:
- A free consultation and estimate about your goals, style and how you will use the space.
- A study of the property, the existing pool and the landscape.
- A 3D design rendering of the feature and its surroundings, with recommendations.
- Construction once you are pleased with the design: framework, concrete and hand sculpting.
- Custom earth-tone coloring and the final reveal.
Caring for artificial rock over time
Well-built artificial rock is durable, but sun and pool water can fade its color over many years, and older features built with metal lath over rebar can crack or show rust streaks. White, chalky efflorescence is another sign that moisture is getting in. Retexturing, recoloring and structural repair can bring tired rock back; see artificial rock repair and the signs a rock waterfall needs repair.
Artificial Rock Contractors is licensed and insured, and every project starts with a free consultation and estimate.