Modern building insulation solutions provide both thermal and humidity comfort as well as an aesthetically pleasing effect. However, an important yet often overlooked aspect is the durability of the achieved results.

Insulation: A Way to Save Energy and Money

High heating bills are often caused by heat escaping from buildings. This happens because the structure lacks proper sealing and insulation. By insulating exterior walls, ground floors, foundations, and roofs, heating bills can be reduced by up to 50%. Styrofoam is one of the most efficient insulation materials, offering a very low thermal conductivity coefficient at a relatively low cost compared to alternative methods.

Why Styrofoam?

Insulation is subjected to various factors from the moment it is applied. These influences can be categorized as:

  • Physical: temperature changes, moisture, UV radiation.
  • Chemical: air pollution, acid rain.
  • Mechanical: direct damage or stress-related wear.
  • Biological: microorganisms, mold, and fungi.

Styrofoam is highly effective for insulation due to its resistance to biodegradation, mold, and fungi. Additionally, its expanded polystyrene structure resists water absorption, with only minimal water penetration occurring in spaces between granules. However, like many other building materials, Styrofoam requires adequate protection from external factors to maintain its technical properties.

Grey Styrofoam Insulation

Graphite-infused Styrofoam has become increasingly popular in recent years among investors and contractors due to its numerous advantages.

Thanks to the addition of graphite granules, grey Styrofoam has improved thermal insulation properties. Its reduced thermal conductivity allows for excellent insulation performance even with thinner panels. Grey Styrofoam meets regulatory standards and is ideal for energy-efficient and passive houses.

However, exposure to UV rays can cause grey panels to expand under heat or melt slightly. The enhanced thermal properties, combined with the dark color, make these panels heat up faster. To mitigate this, installation should be performed using scaffolding covered with protective nets—a practice recommended for all insulation work.

White Styrofoam Insulation

With white Styrofoam, prolonged exposure to direct sunlight can cause yellowing and, over time, surface erosion. Before continuing with further work, any affected surfaces should be sanded down.

The durability of expanded polystyrene (EPS) depends on its structure and application. Proper installation requires the addition of protective layers to shield the material from external factors.

The outermost layer of the insulation system, a thin plaster coating, is especially vulnerable to damage due to its direct exposure to the environment. Regular inspections and the use of biocide-containing plasters and coatings are advisable.

Advantages of Styrofoam Insulation

Styrofoam insulation offers numerous benefits:

  1. Mechanical Resistance: Ensures stability and retains its shape throughout its use.
  2. Lightweight: The low weight of EPS panels does not significantly stress the building’s structural framework.
  3. Ease of Handling: Styrofoam is easy to cut and shape, making it user-friendly during application.
  4. Compatibility: It works well with most materials used in insulation processes. However, it should avoid contact with organic solvents, bitumen, asphalt, tar, gasoline, and diesel.

By using high-quality materials and ensuring proper application, Styrofoam insulation will retain its insulating and durability properties over time. Maintenance will typically involve only minor repairs and general upkeep, resulting in long-lasting efficiency and aesthetic appeal.

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The facade is the calling card of any building, but its appearance and aesthetics are not the only considerations. It’s worth selecting a plaster whose properties will best protect the walls of your home. The type of plaster you choose plays a crucial role. While acrylic and silicone plasters share many common features, their differences determine the conditions under which they should be used. So, which plaster should you choose to fulfill its purpose?

What to Consider When Choosing Plaster

Each plaster type has specific properties that, depending on the building, its location, and the materials previously used, can be an advantage or a disadvantage. Understanding these properties is essential to make the right decision, as the plaster you choose will significantly affect the building’s maintenance over time. It’s also critical to adhere to the application conditions recommended by the manufacturer.

Differences Between Acrylic and Silicone Plaster

Vapor Permeability

This property, also known as diffusion resistance, varies between the two types of plaster. Acrylic plaster forms a barrier to water vapor, meaning it cannot be applied to fresh or damp walls. Additionally, combining acrylic plaster with mineral wool insulation is a poor choice, as this combination can lead to wall dampness and detachment of the facade’s outer layer.

In contrast, silicone plaster is highly vapor-permeable and suitable for insulation using both mineral wool and polystyrene. Its microporous structure facilitates the transport of water vapor and gases, making it a “breathable” plaster.

Resistance to Damage and Dirt

Acrylic plaster is highly resistant to mechanical damage. Its elasticity makes it ideal for buildings near busy roads, where vibrations often cause cracks. It is also frequently used for schools or buildings near areas where children play sports.

Both types of plaster contain specific polymer blends that reduce the adhesion of dust and dirt. However, silicone plaster has a self-cleaning ability. Its hydrophobic nature prevents dirt from sticking to the facade, allowing it to be washed away by rain or pressure washers.

Resistance to Mold and Algae

Both types of plaster contain encapsulated biocides, which protect them from microbial contamination. However, silicone plaster is far more resistant to algae growth than acrylic plaster. After several years, the latter may develop discoloration in shades of green, blue, or black.

Application Recommendations

Both types of plaster can be used for new buildings and renovations of older ones, but their applications differ slightly. Acrylic plaster is best suited for buildings in areas with low or moderate pollution, such as suburban areas. It should not be used for renovating walls with existing moisture due to its low vapor-permeability properties.

Conclusion

Acrylic and silicone plasters both have their pros and cons. They are popular choices for finishing building facades and are available as ready-to-use mixtures in a wide range of colors. However, silicone plaster offers long-lasting aesthetics for facades, maintaining a high-quality appearance over the years.

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