You should never seal your stone, however with limestone, it is highly recommended. Limestone performs far poorer than other stone kinds due to its chemical composition, which is mostly carbon-based. However, if you want a more natural appearance, leaving the stone unsealed will not harm it. You should only seal limestone if you plan to keep it outside year-round or if it is going to be exposed to extreme temperatures. The sealing process will help the stone remain attractive for longer.
If you want to learn more about how to take care of your limestone driveway, see our article: How To Take Care Of Your Limestone Driveway.
Limestone, like other natural stones, is porous and, in fact, extremely impermeable when compared to other dimension stones. A sealer is necessary to make it non-porous. Even though sealing is essential in most places with limestone installations, it is not advised for all limestone applications. Limestone is one of the most porous materials on the market and will require sealing regardless of whether it is exposed or not.
The best way to protect a stone wall from moisture is by installing weatherproofing measures such as insulation or air barriers. If you install insulation or an air barrier and you do not want to expose the insulation or air barrier to the exterior surface of your building, then you should seal the wall. Sealing creates a protective layer over the insulation or air barrier that prevents water from entering the wall cavity. This will help prevent damage caused by moisture exposure.
Sealing a limestone wall is done using a liquid or paste product. The two main types of sealers are polyurea and acrylic. Both can be applied in one step or multiple steps with intermediate coats. The final coat should be allowed to dry thoroughly before exposing the wall to rain or other wet conditions. If the wall has an internal frame, it may need to be covered with plywood first to avoid damaging the wood when applying the sealer.
Limestone is a beautiful material that adds style to a home exterior.
Limestone is one of the most enduring construction materials available. It is thick and robust, with few pores. Fewer pores make the stone more difficult to shatter and allow it to endure abrasion and freeze-thaw cycles. It's also weather-resistant, making it an excellent choice regardless of the weather. Limestone can be used in interior or exterior applications, but it does not emit any toxic substances so it's safe to use around plants or in gardens.
The key advantage of using limestone instead of sand or cement as a base material is its longevity. Most concrete structures are replaced after 20 years because it becomes too expensive to repair them otherwise. On the other hand, if limestone structures are well maintained, they can last for hundreds of years. Of course, this depends on how often they are repaired, but even very rough usage will extend their life considerably. Also, limestone is an environmentally friendly choice.
There are several types of limestone, each with different properties. Calcite is the common name for limestone, while dolomite is a type of calcium carbonate that contains magnesium or calcium ions. If you want to learn more about the differences between these two types of rock, read our article on dolomite vs calcite.
Limestone is used in many ways like as a building material. It can be used alone or as a substrate for other materials to be placed on top.