Perlite plaster is becoming more and more popular because of its special advantages when it comes to improving the look and longevity of building facades. This kind of plaster blends conventional plastering materials with perlite, a volcanic glass that has exceptional insulating qualities. The end product is a thin, very efficient solution that can be used for both new builds and renovations.
The superior thermal insulation of perlite plaster is one of its most notable qualities. Thus, more consistent interior temperature control can result in lower energy expenses for structures treated with perlite plaster. Because of its insulating properties, it’s a great option for increasing comfort and energy efficiency in any climate.
Perlite plaster is renowned for its strength and moisture resistance as well. This makes it especially appropriate for facades that are subjected to inclement weather. Because plaster is lightweight, it puts less strain on building structures, making it a great choice for a variety of building types.
This post will discuss the benefits of using perlite plaster on facades, how to apply it, and whether it’s the best option for your upcoming project. Perlite plaster offers a lot of benefits, whether your goal is to give your building a longer-lasting finish or to enhance its thermal performance.
| Feature | Description |
| Material | Perlite plaster is a lightweight, mineral-based plaster made with perlite, a volcanic glass. |
| Use | Commonly used for facade work due to its insulation properties and durability. |
| Advantages | Good thermal insulation, fire resistance, and soundproofing. It’s also resistant to moisture and weathering. |
| Application | Applied in a thin layer over exterior walls. It can be used on both new constructions and renovation projects. |
| Preparation | Surface should be clean and dry. Primer may be required for better adhesion. |
| Maintenance | Low maintenance. Regular cleaning and inspections are usually sufficient. |
| Cost | Generally affordable, but costs can vary based on location and supplier. |
- Components.
- Properties of thermal insulation plaster.
- Scope.
- Gypsum or lime.
- Do it yourself.
- Factory products.
- Finishing work.
- In the process of application.
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Components.
Three major ingredient groups are present in perlite plaster:
Filler: perlite sand, a porous substance that acts as the coating’s sound and heat insulator;
Binder base: typically made of cement, lime, gypsum, or a mix of these;
Polymer additives to boost the solution’s air saturation, water-repellent qualities, and plasticity.
This is intriguing: Perlite is an acidic form of obsidian, a volcanic glass. Its composition is similar to pearls. From the outside, it appears to be rather large, gray-white sand or small-diameter crushed stone.
When perlite is heated to 1100 degrees Celsius, its ability to swell is utilized to increase its volume several times over in the production of perlite plaster. You can turn up the volume five to twenty times.
The result is an enormous amount of air bubbles in the material. This results in extremely low thermal conductivity, which explains why the plaster coating feels "warm." Additionally, perlite is added to gypsum products, mixes for lightweight concrete, and other mixtures. Plaster compositions are made with large amounts of it.
Properties of thermal insulation plaster.
Due to its many advantages, this plaster is a highly sought-after material for insulating buildings against heat and sound, mostly outside. Benefits of this combination include:
- low density of the components of the solution – the finished coating is light, that is, the load on the supporting structures is reduced; they can be made lighter, arranging a less solid, cheaper foundation;
- non-flammability: the material with perlite has a fire hazard class NG;
- environmental safety; compared to some traditional insulators, the use of perlite plaster does not produce substances harmful to human health;
- ability to perform many functions: such material can be not only heat-insulating, but also a decorative coating; it can be used as a finishing coat and as a means to level the surface of the wall;
- high thermal insulation qualities: according to experts, one layer of perlite plaster five centimeters thick protects against heat loss as well as a wall two bricks thick or as insulation for plaster four centimeters thick;
- ease of application: due to its good plasticity, special skills are not required to make a coating from such material;
- vapor permeability: such a finish "breathes", which has a beneficial effect on the health of people in a building insulated with perlite plaster; this ability prevents the growth of fungus and mold;
- resistance to rapid temperature changes and precipitation; it can be used in damp rooms;
- creates a smooth surface, without cracks;
Crucial point: even if plaster was applied thicker than eight centimeters and plaster mesh was not used, this kind of coating does not shrink at all.
Scope.
Different types of buildings employ perlite coating. It is utilized for both internal and external finishing in industrial settings. utilized in residential structures. It’s used to finish fences and basements. Both residential layouts and agricultural buildings are in need of this type of plaster. It can be used on wood, metal mesh coatings, concrete, and brick bases. One of the coating’s drawbacks is that it is highly hygroscopic. This means that additional materials must be used to protect it from moisture.
Because perlite plaster is lightweight and has excellent insulation qualities, it is a versatile and efficient material to use for facade work. Plaster that has been mixed with perlite yields a material that improves a building’s energy efficiency while also offering a long-lasting and sturdy finish. This kind of plaster is useful for both residential and commercial facades since it lowers outside noise and helps to regulate indoor temperatures.
Gypsum or lime.
Gypsum is the foundation for the preparation of perlite plaster for indoor use. Examples of such products are Glims Velur, a perlite plaster.
Lime is the binding ingredient in plaster, which is typically used for external finishing. Sand and cement are both included, and it works well with porous bases as well.
Do it yourself.
Plaster of perlite is a DIY project. You’ll need water, plasticizer, perlite, and cement for this. Take a single cement part. Filler: four components. Adding water is done until the right consistency is reached. PVA glue and other plasticizing additives make up around 1% of the mixture. Cement and perlite are available in the store. It is also acceptable to use regular PVA glue that dissolves in water as a plasticizer.
- First, the glue must be diluted in a small amount of water.
- Then mix the cement and perlite.
- Then add water to them, gradually pouring it in until you get a mass – thick, but at the same time plastic.
- The mixture must be left to stand for about fifteen minutes.
- Stir the composition again.
For instance, approximately 375 kg of cement, 300 liters of water, and 4–5 liters of PVA glue are needed to make one cubic meter of perlite.
Professional advice: a ready-made factory mixture will cost more for finishing large quantities than homemade perlite plaster. Three to four thousand rubles is the cost per ton of M500 cement. A twenty-kilogram bag of slaked lime, or 170 rubles. Perlite in a cubic meter costs between 1,500 and 2,000 rubles.
Factory products.
While a factory solution is slightly more expensive, purchasing one is simpler. Its benefit is found in the accurately determined ingredient ratio. It also contains specific materials added to it that have the ability to repel water. These mixes need to be diluted with water, exactly as directed by the manufacturer. This will bring about the intended outcome. The entire composition must be prepared from one package right away. In this manner, the final coating will have a higher quality. The mixture ought to be homogeneous and devoid of dense inclusions. The solution starts to harden after two to three hours, so it needs to be used quickly.
Finishing work.
A crucial note: you have to fill the sores on the wood if the solution is going to be used for plastering it. If this isn’t done, the base will not have a strong clutch and will crumble rapidly.
Water is used to wet the concrete and brick walls before applying facade plaster. Dust, grime, and any finishing materials that were previously on them are removed before this.
A specific primer is applied to the surface in order to achieve good adhesion. If the base for the decoration is a wall with a high absorbent ability, they are lubricated with a few layers; if there are surface cracks and potholes, they must be covered with a specific plaster mixture.
In the process of application.
It can be used at up to five degrees Celsius in temperature. Low-quality coating may result from lower indicators.
- Application is performed using a spatula. Then the solution is equal to the pressure. For this, a grater or rule is used.
- Each layer of the mixture is recommended to be made with a thickness of 5 to 50 mm.
- If you need a thicker coating, several layers are performed.
- After the solution grabs, it is cut, using the rule.
- After two hours, you can look at the surface: a sponge is taken, moistened in water and the coating is wiped with it.
- The color of the finished wall can be done after two to three days.
- The highest strength indicators are observed in this type of finishing composition after 28 days.
- The maximum thermal insulating characteristics of this plaster are formed after two months since it will dry out.
Because perlite plaster has a special blend of durability and thermal insulation, it’s a great option for facade work. Its low weight lessens the overall load on the building’s structure and facilitates application. This increases the plaster’s longevity and enhances the building’s energy efficiency by offering strong insulation against temperature changes.
Additionally, perlite plaster resists moisture and aids in the prevention of problems like mold and mildew, which are frequent concerns in facade applications. Because of its inherent qualities, it can withstand harsh weather and continues to function well, making it a dependable choice for a variety of climates.
In conclusion, perlite plaster provides a useful and efficient option for facade construction. Its advantages, which include moisture resistance, superior insulation, and lightweight application, make it a useful material for extending the lifespan and functionality of building facades. Perlite plaster is definitely something to think about for anyone trying to enhance the exterior of their building.
