Aerated concrete block plastering is an essential step in building and remodeling because it gives the structure protection and visual appeal. It is crucial to know the proper methods and supplies for plastering these blocks, whether you are building a new home or renovating an old one.
Aerated concrete blocks are well-liked because of their superior insulating qualities and simplicity of use. Nonetheless, extra care must be taken when plastering them in order to guarantee a smooth and long-lasting finish. Although these blocks are porous, you can still achieve a high-quality result that prolongs the life of your walls if you take the proper approach.
From surface preparation through the application of the final coat, this guide will take you through all the important steps involved in plastering aerated concrete blocks. You can guarantee a successful plastering job that looks fantastic and endures over time by adhering to these helpful tips.
Aspect | Description |
Surface Preparation | Clean the blocks from dust and debris, and apply a primer to ensure better adhesion of the plaster. |
Plaster Type | Use a lightweight plaster specifically designed for aerated concrete to avoid overloading the wall. |
Application | Apply the plaster in thin layers, allowing each layer to dry before adding the next one. |
Finishing | Once the plaster is fully dry, sand the surface for a smooth finish before painting or decorating. |
- General recommendations
- Types of plaster for aerated concrete blocks
- Requirements for plastering
- Cost
- Necessary materials and tools
- Priming the surface
- Reinforcement
- Preparation of the solution
- Video on the topic
- Interior finishing of GB. VOLMA. Plastering of walls.
- Cement plaster on aerated concrete. Technology.
- Plastering and puttying of aerated concrete WE BUILD FOR OURSELVES
- Simple finishing of aerated concrete, external plastering, composition, application features.
- How to plaster aerated concrete, preparation of the block base
- How to PLASTER AERATE BLOCK?! | Cement or gypsum PLASTER?!
- Plastering without insulation of facades of a house built from aerated concrete blocks, base reinforcing layer
General recommendations
Aerated concrete block walls shouldn’t be plastered blindly. Furthermore, it is not possible to make the finishing entirely waterproof. These are required recommendations. When there is extreme frost, breaking the rules results in the walls rupturing. In addition, moisture protection for the building base is necessary to ensure that a comfortable microclimate is created inside the structure. An appropriate plaster choice for aerated concrete blocks will aid in resolving this issue.
It is advised to begin finishing from the inside of the building rather than the outside. Aerated concrete blocks will dry out as a result of this process, ensuring a lengthy repair period free from the growth of mold and mildew beneath the materials.
Types of plaster for aerated concrete blocks
An amateur can get confused about what to plaster aerated concrete blocks with. It is advised that professionals use specific mixtures designed for this material when finishing. "Plaster mixes for aerated concrete blocks" is a notation made by the manufacturer on the packaging.
It is not advised to finish the material with opaque extruded polystyrene foam and vapor-impermeable, waterproof paints for insulation purposes.
Not only should you know what to use for plastering aerated concrete blocks, but also what you cannot use to complete them. For the following reasons, it is therefore not advised to use a cement-sand mixture with this material:
- Poor adhesion. The cellular material will quickly absorb moisture from the cement-sand mortar. Loss of moisture leads to the formation of defects on the surface. Then pieces of plaster will fall off along with the finishing.
- Poor vapor permeability. Cellular materials also have poor vapor permeability, which, in combination with a cement-sand agent, leads to a deterioration in the microclimate inside the building, since the air in the wall stops circulating.
Requirements for plastering
The requirements for plastering on aerated concrete blocks are as follows:
- water resistance, to protect the building base from precipitation that destroys the material;
- frost resistance for using the product in harsh climatic conditions;
- vapor permeability, so that there is no rupture of the walls at low air temperatures;
- resistance to mechanical damage;
- heat resistance – this property allows you to protect the building base in case of exposure to an open flame, which increases the fire safety of the facility;
- good adhesion, so that the product reliably adheres to the surface;
- elasticity – this property prevents the occurrence of defects on the material when the air temperature changes.
Cost
It will be less expensive to plaster aerated concrete blocks if you finish the job yourself. The costs in this instance are limited to the purchase of supplies and equipment. It will cost about 180 rubles per 25 kg bag if you choose to use a cement mixture made in your country. A primer, reinforcing mesh, and additional tools are also required. The manufacturer and kind of goods determine the overall cost.
Professional plastering with aerated concrete will cost more. In this instance, the client covers the cost of materials as well as the professionals’ services. The building’s area, the compositions’ manufacturer, and the experts’ pricing strategy all affect the final cost. 500 rubles is the average price per square meter of surface. Plastering, reinforcing, and priming are included in this. Materials are paid for separately.
Aerated concrete blocks must be plastered in order to improve their appearance and longevity. During this process, a protective layer is applied to the blocks’ porous surface, sealing it off from moisture and guaranteeing an even, smooth finish. Your walls will become more resilient and aesthetically pleasing if you use the right materials and follow the right procedures to achieve a long-lasting and beautiful finish.
Necessary materials and tools
To complete, you will require:
- plaster for aerated concrete;
- primer;
- reinforcing mesh;
- metal profiles;
- rule for leveling the composition;
- float, which removes excess material;
- industrial float for cleaning the surface;
- plumb line for checking the quality of the finish;
- special bucket for throwing the solution onto the surface;
- self-tapping screws;
- industrial mixer or drill with a mixer attachment for mixing the product;
- container for dosing the primer;
- brush, roller or spray gun for applying the primer;
- bucket for mixing the solution.
Priming the surface
- Plastering walls from aerated concrete blocks begins with surface preparation. The building base is swept to remove all dust and other contaminants. At this stage, the surface is covered with a primer. For aerated concrete blocks, it is recommended to use a primer that is designed for a building base with the properties of quickly absorbing liquid.
- The primer is poured into a clean container and applied with a brush or roller. If the master uses a spray gun, then the primer is poured into the tool and sprayed on the surface.
- The primer is applied in two layers. After each treatment, there should be a break to dry the material. The surface is treated carefully, without gaps.
Reinforcement
Aerated concrete wall plastering (see the video below for the finishing process) is done on the reinforced surface. Fiberglass mesh is advised since it can withstand the product’s alkaline environment. If this requirement is not fulfilled, the reinforcing material will eventually dissolve beneath the plaster layer. As a result, the entire finish will come away from the wall.
Screws hold the material firmly to the surface.The image below illustrates how the mesh is stretched to prevent sagging.
Preparation of the solution
The solution must be ready before plastering aerated concrete blocks. An industrial mixer or a drill fitted with a mixer attachment are used to combine the product. The preparation of the solution strictly adheres to the directions provided on the package.
- Water is poured into a bucket and the dry mixture is added. It is important to observe the proportions of the material and liquid. Too thick a composition does not adhere well to the building base, and the liquid solution flows down.
- The solution is mixed until it acquires the consistency of thick sour cream.
- After this, the mixture is kept for 10 minutes and stirred again.
Aerated concrete blocks can be plastered, which is a useful way to improve the look and longevity of your walls. It offers a level, smooth surface that you can paint or embellish to fit your design while shielding the blocks from moisture and other elements of the outside world.
Making sure the surface is clean, dry, and primed is essential to getting the best results. It’s equally crucial to select a plaster mix that works well with aerated concrete in order to prevent cracks and guarantee durable adhesion.
You can produce a robust, eye-catching finish that will endure over time by using the proper application methods and giving yourself enough drying time. Aerated concrete plastering may take some time and careful attention to detail, but the results are well worth the effort.