Mineral wool, sometimes referred to as stone wool or mineral wool plaster, is a very efficient way to insulate and safeguard buildings. This method not only increases the structure’s longevity and aesthetic appeal, but it also increases energy efficiency. Gaining knowledge about the advantages and methods of plastering on mineral wool will enable you to produce a long-lasting, expert finish.
Because of its superior acoustic and thermal insulation qualities, mineral wool is preferred. It is a secure option for building exteriors because it is also fire-resistant. It forms a strong barrier against weather and ensures that your building is safe and comfortable all year long when paired with a layer of plaster.
To guarantee a strong bond and a smooth finish, there are several essential steps in the plastering process when using mineral wool. The surface must be prepared, a base coat must be applied, reinforcement mesh must be embedded, and a top coat must be applied. To attain optimal outcomes, meticulous attention to detail is necessary at every phase.
This method’s success depends on using the appropriate supplies and methods. The kind of reinforcement used, the plaster type, and the application technique all have a big impact on how long-lasting and effective the facade is overall. Plastering on mineral wool can change and preserve your building for many years if done correctly.
| Step | Description |
| Preparation | Clean the facade and install a metal mesh over the mineral wool for better adhesion. |
| Mixing Plaster | Prepare the plaster mix according to the manufacturer"s instructions, ensuring a smooth consistency. |
| Applying Base Coat | Apply the base coat of plaster using a trowel, ensuring an even layer across the entire surface. |
| Embedding Mesh | Press a fiberglass mesh into the wet base coat for added strength and crack resistance. |
| Applying Finish Coat | Once the base coat is dry, apply the finish coat, smoothing it out for a clean appearance. |
| Drying | Allow the plaster to dry completely before applying any paint or additional treatments. |
- Types of mineral wool
- Density of mineral wool
- Stone wool manufacturers
- Advantages and disadvantages
- Choosing plaster for the facade
- Mineral
- Acrylic
- Silicate
- Silicone
- Video on the topic
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Types of mineral wool
The selection of mineral wool is based on the task that it needs to accomplish. Thus, it’s important to research every aspect of the finishing material before making a purchase.
.. All safety regulations must be followed during installation because the composition’s fiberglass threads have the potential to irritate skin or cause respiratory system damage. The material’s low heat conductivity and hygroscopicity make it ideal for finishing facades. The elasticity and strength of glass wool are among its benefits.
Density of mineral wool
During the production phase, the density of the building material is formed. In other words, you shouldn’t always use a thick roll when insulating a wall.
The recommended density of mineral wool for indoor finishing is between 30 and 80 kg/m³. This kind of material will act as sound insulation. It is advised to use products with a density of 130–160 kg/m³ when working outside. The finishing material for ventilated facades is mineral wool, which has a density of 80–130 kg/m³.
The installation material is available for purchase in slabs and rolls. The latter allows you to select the thickness (which ranges from 5 to 15 cm). For facade finishing, mineral wool slabs with a thickness of 10 cm are typically utilized.
Stone wool manufacturers
You can buy the following items to finish exterior walls before plastering them:
- Rockwool (Facade Batts series);
- Ursa (Geo Facade);
- Isover (Facade and Plaster);
- Knauf (TS 032 and TS 034 Aquastatik);
- TechnoNIKOL (Isobox Facade).
Plastering mineral wool facades improves a building’s energy efficiency and protection by combining durability and insulation. By directly covering the mineral wool with a layer of plaster, this method produces an exterior finish that is seamless and durable. It keeps a sleek, contemporary appearance while offering superior thermal and acoustic insulation. This technology is a great option for sustainable construction projects because it not only increases the building’s performance but also creates a cozy interior atmosphere.
Advantages and disadvantages
- sound insulation;
- vapor permeability;
- fungus resistance;
- corrosion resistance;
- environmental friendliness;
- ease of installation;
- fire resistance;
- low thermal conductivity.
- The need to perform installation using a reinforced mesh. If the laying technology is not followed, cracks may form on the facade.
- Most types of mineral wool (provided that there is no upper protective layer, t.e. plaster or other finishes) absorb water. Because of this, the thermal insulation properties of the material are reduced.
Choosing plaster for the facade
The right mixture must be chosen for the facade’s finishing in order to shield mineral wool from the elements.
- the ability of the composition to be evenly distributed over the work surface;
- resistance to mechanical and chemical influences;
- vapor permeability;
- water-repellent properties.
Mineral
Cement is the building block of mineral plaster. The composition contains special additives to improve adhesion and plasticity. The microfiber fibers in the finishing material give it more strength. Since plaster is sold dry, it needs to be ready for use. The seller’s instructions for combining the working solution are printed on the packaging.
Acrylic
A tiny amount of mineral components and acrylic resins are present in acrylic plaster on mineral wool.
- durability;
- resistance to temperature changes;
- high adhesion;
- water resistance;
- ease of application.
Silicate
Comprises potassium silicate and acrylic resins. Properties of the plaster include durability, vapor permeability, and plasticity. does not need to be prepared because it is already packaged and ready to use.
One of the drawbacks is that silicate plaster dries quickly. This is why a professional should complete the task.
It is also required to apply a silicate primer to the surface before applying this plaster.
Silicone
Silicone primer is required as a base for plaster. One drawback is the high price of the goods.
- resistance to fungal attack;
- good adhesion;
- non-toxicity of the material;
- does not attract dirt;
- vapor permeability;
- plasticity.
A building’s visual appeal and energy efficiency can be effectively increased by plastering a facade with mineral wool insulation. You can guarantee a long-lasting and robust finish by using high-quality materials and adhering to the right procedures.
The proper surface preparation, base coat application, embedding the reinforcing mesh, and topcoat application are crucial steps in this process. Every stage is essential to the plastered facade’s overall functionality and durability.
Paying close attention to details and following instructions will help you steer clear of common problems like plaster detachment or cracking. This will produce a facade that is both aesthetically pleasing and offers superior acoustic and thermal insulation.
Plastering over mineral wool correctly takes time and effort, but the results can greatly increase a building’s comfort and efficiency, so it’s a worthwhile project for any building or renovation.
