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Cast stone is a concrete masonry application that simulates natural-cut stones and has quite a number of architectural uses. Cast stone repair is necessary because these stones are mostly found on building exteriors and outdoor gardens, usually as trims and ornaments. It is made from white cement, natural sands, and crushed stones, and can be colored using mineral pigments.

The beauty of cast stones is undeniable however they will only look great if they are well-maintained. Repair and maintenance are necessary to preserve the look the concrete’s physical appearance with cleaning and patching the two most common methods used to restore the natural beauty of these stones.

Cast Stone Common Issues

Some of the most common problems that are associated with cast stones will appear over time. While cast stones are natural and cost-effective, they are very susceptible to the elements as they are mostly placed outdoors. These problems include:

1. Soiling

Excessive soiling of cast stones is a result of soot, pollution, and dust. Cast stones are made of absorptive materials and have a rough texture. This is the reason why particles easily settle onto its surface. When this happens, cast stone cleaning becomes mandatory.

2. Crazing

Crazing pertains to the hairline patterns found on stones. It is also referred to as mapping because they look like borders on a map, with these patterns extending several millimeters in length. Although not really severe, they’re cosmetic flaws that you can do without. They also affect the overall look of the stone.

3. Cracking

Aside from crazing, actual cracking on the stones could appear. Cracking is a major concern because it affects both the appearance and structural capacity of the stone. Here is where a major cast stone repair is needed, which mostly consists of the processes called patching. Patching should be done with utmost care, as the best color match is needed to restore not just the stability of the structure but also the natural aesthetics of the stone.

4. Corrosion

Corrosion is also a major problem with cast stones because of the reinforced steel embedded found inside them. These steel can corrode over time and lead to the cracking on the surface. When this happens, cracking also occurs. The stability of the cast stone is also compromised.

Cast Stone Repair and Maintenance

Professional cast stone repair and maintenance starts with cleaning. Soiled cast stones are successfully treated with conventional detergents, water rinses, and chemical cleaners. They are also aggressive chemical cleaners available but these should be used with utmost care because they can dissolve the binders in the material. Patching, on the other hand, is a process that requires broad knowledge and meticulous effort. When not performed correctly, the material used for patching may produce fragile edges and increased water penetration.

Other popular cast stone repair methods include re-etching, chemical injection, and supplemental anchor installation. The right solution would depend on the problem exhibited by the stone structure. Talk to an expert to know the best way to repair and maintain cast stones and other masonry applications in your home.