Facade and interior decoration of aerated concrete: plaster and other types

Aerated concrete provides a useful and adaptable option for interior and exterior decoration. Despite being lightweight and insulating, this material needs special treatments to maintain its durability and visual appeal.

Plastering improves the building’s appearance and acts as a protective layer for facade applications. Different plaster types can be used to create a variety of finishes, from sleek and contemporary to rustic and textured.

Plaster and other decorative treatments have the power to completely change the interior design and atmosphere of a space. Knowing what options are available makes it easier to choose the best strategy for creating a unified and fashionable interior design.

External decoration of aerated concrete

Remember that aerated concrete is a porous material with a good vapor permeability of 0.15-0.25 mg/(m*h*PA), depending on the density, when deciding how to finish the facade of a house made of it.

As a result, the wall covering materials must have vapor permeability equal to or greater than that of aerated concrete. This will prevent water vapor from remaining in gas blocks, shield the rooms from excessive humidity and mold, and prevent cracks in the walls.

Let’s look at the following choices for aerated concrete facade finishing:

• Brick cladding.
• Curtain wall (siding, facade slabs and panels)
• Plastering

Brick cladding

Benefits of this choice include well-protected aerated concrete walls from blowing, rain, and snow. Brick is non-flammable and long-lasting. Extra insulation against heat in the house.

The cladding method’s drawbacks include its higher cost and intricate execution.

Bricks are placed one row deep. It should have a minimum of 3 cm space between it and the aerated concrete wall. This gap is used to drain moisture from the blocks and ventilate the facade.

For the vent’s air circulation.Vents, which are covered in mesh, are what create the space between the bricks that leads to the street.

Flexible connections, such as metal plates or basalt anchors, are inserted between the blocks even as the house’s walls are being built. These connections will join two walls together. Anchors are 20–60 cm long, 4-6 mm diameter corrugated rods.

They are positioned 500 mm apart both horizontally and vertically in a checkerboard pattern. They are also positioned at the openings and in the building’s corners.

You can use rods with dowels drilled into the wall and driven into it if flexible ties are not used when laying aerated concrete blocks.

Additionally, the foundation needs special attention when dealing with a brick facade. When determining its bearing capacity, the weight of the cladding must first be added. Second, determine the base’s thickness to allow for brickwork, a ventilation gap (with insulation if applicable), and a load-bearing wall.

Curtain wall

Plastic siding, lining, cladding panels, and other materials installed on the sheathing can also be used for the exterior finishing of an aerated concrete home. This kind of cladding is simple to install and reasonably priced.

The following is the process for building a curtain wall.

Putting in the sheathing. Either a wooden beam or metal guides are utilized for this. To stop it from rotting and growing mold, wood should be treated with an antiseptic before use. The type of curtain wall and the amount of insulation determine the installation position and frequency of the guides.

The sheathing is fixed beneath the mineral wool at a 600 mm spacing between each other, which matches the mat width. When installing two layers of insulation, the first layer’s guides are affixed vertically, and the second layer’s guides are affixed horizontally.

The insulation is placed on top of the sheathing and then covered with a waterproof membrane that allows steam to escape. The cladding, which can be panels or siding, is mounted onto the membrane, which is pressed up against the vertical guides made of wooden slats or a profile.

The lathing is constructed to maintain a 30 to 50 mm ventilation gap. The gas block’s walls need to have moisture removed, just like brick cladding.

The guides must be secured to the home’s wall using specialized dowels designed for aerated concrete. They will stop corrosion and the screw from being pulled out.

Using screws or nails, the facing material is fastened to the sheathing. For facade slabs, a variety of suspended systems are also employed.

Plastering facade walls

Plaster exterior finishing is another common technology used on aerated concrete homes. In addition, the cost of the job varies significantly based on the kind of mixture and application technique. For instance, you could use a foam bucket to apply the solution automatically, level it, or leave a "fur coat" effect. or manually apply plaster to create a variety of textures and brickwork-like effects.

You have to consider the following when selecting plaster for the facade:

• More vapor permeable than aerated concrete;
• Hydrophobic;
• Shockproof;
• Fireproof;
• Resistant to precipitation, frost and ultraviolet rays.

Mineral mixtures, such as silicate and silicone plasters, as well as cement mortars, satisfy these requirements.

Getting the walls ready before work begins:

• Seal all the recesses and depressions with block glue;
• Align with a float if necessary;
• Remove dust and various contaminants from the surface to be plastered;
• Apply a primer; for aerated concrete, choose a vapor-permeable one.

Plastering should start as soon as the wall is ready from the outside.

Using a reinforcing mesh is a crucial step. Without it, a 15-20 mm thick layer of plaster can be applied to the wall for interior decoration. However, a mesh is unquestionably required for the exterior home décor in order to keep mother-in-laws out.

The plaster’s thickness determines the type of mesh used, the size of the cells, and how they are fastened. Fiberglass mesh or welded galvanized wire with a small cell (5–6 mm) can be used to reinforce a thin layer of 15-20 mm. This is achieved by applying a rough layer of mortar to the wall that is 3-5 mm thick. Next, a spatula is used to apply and press a reinforcing mesh to the wall. After being smoothed out, the mortar that passed through the mesh is allowed to dry.

When maintaining a plaster layer greater than thirty millimeters on the wall, utilize an expanded metal mesh with a ten by twenty-five millimeter cell or a 10 by ten millimeter chain-link mesh. Large-headed self-tapping screws are used in this instance to secure the fastening.

After the mesh-covered rough layer has dried, apply a decorative plaster or paint finish, like "bark beetle." Additionally, you can use plaster to replicate brickwork or stone to adorn the facade.

Selecting the appropriate plaster or other finishing materials is essential for achieving both durability and aesthetic appeal when using aerated concrete to decorate facades and interiors. This article examines several plaster choices and substitute finishes, emphasizing their advantages, methods of application, and ways in which they improve the appearance and usefulness of aerated concrete surfaces.

In conclusion, aerated concrete’s facade and interior design provide a variety of options to improve the look and longevity of your areas. Plastering is still a common option because of its adaptability and capacity to produce a surface that is sturdy and smooth. It can be customized to fit a variety of finishes, from traditional to modern, making sure it blends in with the overall style of your house or structure.

Aerated concrete can also be successfully finished with paints, cladding, and textured coatings in addition to plaster. Every technique has advantages and can give your walls a distinct personality. The secret is to choose the appropriate finishing depending on your taste in design, the particular requirements of the area, and the climate where you live.

In the end, the final appearance and functionality of your decoration will depend on the material and technique you choose. You can ensure that your aerated concrete walls are both aesthetically pleasing and well-protected by taking these factors into account.

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