Plaster walls from foam block indoors

Inside walls constructed of foam blocks, plastering is a common and efficient way to get a smooth, long-lasting finish. Modern construction is using more and more foam blocks, which are lightweight and insulating. However, in order to guarantee a stable and aesthetically pleasing plaster coat, their porous surface needs to be properly treated.

The increased visual appeal of plastering foam block walls is one of its main advantages. Smooth, elegant walls ready for paint or other finishes can be created from rough, industrial-looking foam blocks with a well-applied layer of plaster. Because of this, it’s the best option for interiors in both homes and businesses.

Plastering also adds a layer of protection that helps extend the life of foam block walls. Plaster stops moisture from penetrating the surface, which could otherwise cause problems like mold growth or gradual structural weakening. This protective characteristic is particularly crucial in interior spaces where humidity fluctuations can occur.

Plastering foam block walls requires careful attention to detail and the use of appropriate materials for optimal results. The results can vary greatly depending on the surface preparation, plaster type, and application techniques used. Plastering can improve the look and feel of your foam block walls with meticulous attention to detail, ensuring that they stay a strong and appealing part of your room.

Material Needed: Plaster, Foam Blocks
Preparation: Clean the foam block surface thoroughly and let it dry completely.
Priming: Apply a suitable primer to the foam block walls to improve adhesion.
Mixing Plaster: Follow the instructions to mix plaster to the desired consistency.
Application: Apply the plaster evenly onto the foam block surface using a trowel.
Drying Time: Allow the plaster to dry completely as per the manufacturer"s instructions.
Finishing: Sand the plastered surface lightly to achieve a smooth finish if desired.

The importance of plastering foam concrete

One of the many benefits of foam blocks is their excellent thermal insulation. Meanwhile, moisture accumulates in the cells on the inside of the wall surface, greatly diminishing its thermal properties. Moreover, excessive humidity ruins the block, encourages corrosion to form, deforms the reinforcement, and leaves spots on it.

Pokoblok plaster prevents mold and other dangerous microorganisms from growing. Using specific techniques to decorate the wall can greatly enhance the unit’s functioning capabilities.

The foam block plaster on the inside walls counteracts the building’s shrinkage and eliminates evaporation from the home.

Features of working with this material

Inside the house, plaster walls made of foam blocks resemble the process of plastering a gas concrete building or a brick structure. The ideal time to finish work is during heat +5… +30 s. Work should begin no sooner than 16 weeks after construction is finished in order to prevent the plaster from cracking, as shrinkage takes time.

The primer must be used as a base layer to prepare the surface before applying the leveling solution because the smooth foam concrete surface in the blocks has poor fastening qualities.

Applying the soil three times will greatly enhance its surface qualities.

The primer’s quality directly affects how long the plaster lasts. In order to ensure that unprocessed areas do not remain, a primer is applied to the wall surface using a painting brush or roller. Only after it has dried is more work done.

The choice of a suitable plaster mixture

Before beginning any interior decoration project, a common concern is how to plaster foam blocks inside the home. The best option is to use specialty blends:

    AGIDA XIS-42 and AGAD TM-35-finishing solutions for internal and external plaster from the manufacturer will “win”;

How to plaster the wall from foam blocks inside the house with your own hands

People who initially choose to independently finish the interior of the house are frequently curious about the correct way to plaster foam block walls. You are able to do this as high quality according to certain rules. Fundamental Guidelines:

  1. Internal plastering work must be carried out no earlier than 30 days after the walls were installed, because they can shrink and the plaster will be shown.
  2. The most suitable finish temperature is +5 +30 C;
  3. The surface must be prepared in advance, the walls are cleaned.
  4. With repeated plaster, when applying the next layer, you need to wait for the previous dry.
  5. Blocks and the last layer are mandatory.
  6. You need to primer a roller or a brush.
  7. A special mesh is installed on the wall plane.
  8. If the layer is thick, then you need to put the beacons.
  9. To improve the quality of the clutch of the block with the wall solution, you need to spray with water, it is most convenient to do this with a spray gunner.
  10. The solution must be poured into the walls using the trowel, and then the surface is aligned with provision.
  11. As soon as the plaster solution dries, you can remove the excess solution using a spatula.
  12. The base layer is processed with a primer, then the finish layer is applied.

Fastening of the plaster mesh

A fine-handed mesh is used to decorate the interior of the house. It is applied to the wall surfaces and coated with a mixture of highly adhesive materials. The layer, which has a thickness of one centimeter, is applied using a comb and spatula. Here, fiberglass needs to be discarded. Horizontal grooves on the processed surface are what are needed to fix the solution.

A fine-gauge mesh that is applied to wall surfaces is used for decorating interior spaces.

Installation of lighthouses

A standard T-shaped aluminum profile can be used for the lighthouse; it should be installed vertically with a maximum distance of one meter between each one to greatly simplify compliance with regulations. Using the other installed profiles, you must pull the thread between the beacons once they are installed at the edges using a level.

Other projecting details, like windows or doorways, are navigable. Lighthouses are fastened with any quickly drying mixture on two points.

Laying the main layer of plaster

Professionals who can explain how to plaster foam blocks and how to complete the process in phases. It is necessary to apply a thick layer first, then to leve everything, removing any excess solution along the beacons. The second layer can be applied once the first layer has dried. The rule applies to the next layer as well. A half-life should be the fundamental mixture.


The grout is made using the same mixture as plaster; however, it needs to have a more liquid consistency, so it needs to be diluted with water and strained through a tiny strainer. After applying the solution to a plaster that has partially dried, it is aligned with the rule and polished with a wooden grater.

The beacons are taken out of the surface once it hardens, and the remaining groove is wiped and smeared.

The beacons are taken out of the surface once it hardens, and the remaining groove is wiped and smeared.

What is the dew point

Poor quality interior plaster will ruin everything, regardless of how protective the exterior finish is for the house. Therefore, if the inner layer is thicker than usual, the dew point will form in the winter because the blocks won’t warm up to the proper temperature.

This phenomenon may cause housing to become unfinished and cause mold to grow on the walls. The only rule that can prevent this issue is the requirement that the external finish and interior plaster have a 1 to 2 ratio.

If the inner layer is thicker than usual, the dew point forms because the blocks won’t warm up to the proper temperature in the winter.

What tools will be needed

Aside from the question of how to plaster foam blocks, another one to consider when finishing a house is what tools will be required. The following equipment will be needed for plastering tasks:

  1. Drill and mixer nozzle to it.
  2. A few spatulas.
  3. Spended the level.
  4. Large brushes or roller.

The use of foam blocks for interior decoration greatly enhances the structure’s quality features, effectively guards against moisture, and retains heat during cold weather. But only if you pay attention to the technological process and use the right tools can you, once the work is done, get the desired result.

A useful and adaptable way to improve the durability and aesthetics of interior spaces is to plaster foam block walls indoors. Foam block offers both structural integrity and energy efficiency, making it an ideal foundation for plaster application due to its lightweight and insulating qualities.

Plastering foam block walls has many advantages, one of which being its seamless, smooth finish that gives any space a refined, clean look. Plastered foam block walls provide an adaptable canvas for a variety of decorative treatments, such as painting, wallpapering, or textured finishes, whether you’re remodeling a residential house or creating a commercial space.

Furthermore, improved thermal comfort and indoor air quality can be achieved by plastering foam block walls indoors. Plaster improves the overall insulation of the building envelope by sealing any gaps or cracks and preventing moisture infiltration and air leakage. This lowers energy consumption and utility costs while also improving occupant comfort.

Plastered foam block walls are also very long-lasting and durable, which makes them an economical choice for any interior construction project. Plasted foam block walls have a longer lifespan and require less maintenance over time because they are resistant to moisture, mold, and mildew, unlike traditional drywall or wood paneling.

In conclusion, improving the quality and functionality of interior spaces can be accomplished both practically and aesthetically by plastering foam block walls indoors. Foam block offers a smooth and seamless finish that improves a room’s appearance and functionality. Its lightweight, insulating, and durable qualities make it an ideal substrate for plaster application.

Indoor foam block wall plastering produces a smooth, long-lasting surface that improves a space’s look and use. The foam block surface must be prepared, a base coat must be applied, and a top layer of plaster must be applied to complete the process. In addition to enhancing appearance, proper plastering strengthens and insulates the walls, guaranteeing a beautiful, long-lasting finish that complements a variety of interior design styles.

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Daria Yakovlev

Interior designer, author of online color design courses. I will help you create a harmonious interior using color.

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