How to plaster concrete blocks. Features production and sawing injection method

Foam must be protected from humid shrinkage, ie, cracking, minimizing air access thereto. The most affordable way to do this - to plaster the walls.

The question of how to plaster blocks, is quite important, because the technology is wrong can completely deprive the material of positive characteristics: frost resistance, low thermal conductivity, and water vapor permeability.

Why is it so important

Foam concrete - building material, which has several important advantages. Widespread it has received for its lightness, water vapor permeability and excellent insulation qualities.

But here is the plaster foam, is an obvious difficulty. The problem is that it has poor adhesion.

In other words, conventional sand-cement and lime plaster to it hardly adhere. So you have to eliminate all universal solutions like dry ready, and those who can do it yourself.

You feel like it or not, but the walls must be protected. Alternatively, the moisture contained in the atmosphere begins to penetrate into the porous concrete, and then - in the room.

In addition to the sharp deterioration of the whole climate in the building, the moisture will cause the walls of the mold stains.

For home, built of concrete blocks, are essential indicators of water vapor permeability of plaster. Calculation errors after several cycles of freezing and thawing, will be the main cause of the formation of cracks and peeling of the outer plaster.

Important advice on how to properly plastered concrete blocks - they do not need a thick lining. It is sufficient thickness of the outer layer of 0.5-1 cm, and the internal - 12 cm.

Unlike other materials, concrete blocks do not absorb water, so the application of the plaster on the walls with his own hands to dry out completely. Because of this specificity of the whole process takes more time and allows for a thorough grout lining.

Before you start finish aerated concrete walls, you need to choose the right type of plaster. She should have a good water vapor permeability, as in most cases, according to a statement.

Features production of foam blocks

Manufacturing of foam blocks is divided into several stages: mixing of the solution, forming, drying, stripping, cutting, heat treatment and packing.

casting process

It resembles the traditional production of concrete products. The solution is poured into an iron form and dried to a set of full strength.

The molding technology used cluster form, which is an iron pan with removable sides. Bulkheads divide a form into several sections. The most frequently used cassette height 60 cm.

The main disadvantages of this method:

Poor geometry ready blocks. Often the blocks are different in length, height and width. Such marriage formed by displacement bulkheads by pouring the solution into the cassette.

Moreover, when stripping forms angles and surface blocks partially damaged in the future creates many difficulties when plastering.

Saw the way

The construction of the walls of the foam blocks cut

This method consists of three steps: molding foam in great shape, its stripping and cut into blocks of a given size.

The technology has several advantages:

1. Precise geometry blocks obtained which corresponds to EU standards. With this clutch can be planted on the glue with the seam of minimum thickness.
2. Since there are no remnants of concrete on greases, which handles tape, cut blocks have better adhesion.
3. Stuff you can do with a given size according to customer requirements.
4. On the corners and edges of the material do not have chips and irregularities. This is especially important to reduce the financial and human costs during plastering.

From everything written it can be concluded that one of the main tips on how to properly plastered concrete blocks, is to purchase the building material obtained by sawing.

On the right plastering foam blocks

Plaster blocks produced by cutting adheres quite well, but the material produced by casting, it is necessary to strip or skins to remove the top layer.

Also for lining molding blocks it is recommended to use mixtures with higher adhesion. Experts recommend to improve the coupling of plaster and walls to use reinforcing mesh.

Note! Such a grid must be applied before the plastering of cut foam blocks. Mesh belt fastened in places where concentrated stress: in the corners of rooms and the facade, the windows, above the doors.

To maintain a good steam permeability blocks and insulating qualities, thickness stucco should not exceed 1 cm, and the inside - 2 cm. In this case, the thermal conductivity of the material obtained by uniformly increasing, and the moisture does not condense, leaving the building.

Otherwise, it is likely that it will stay under the outer layer of the lining, as this will lead in the future to its peeling and mold reproduction.

Produced plaster walls of foam blocks special light dry mixes with the note "to foam".

These solutions can be used as wall plaster outside and inside the premises. Most often, it is dry gypsum plasters, which shut water and stir building mixer or a drill with an attachment to the desired thickness.

Before applying plaster surface of the walls of the foam blocks is mandatory must be primed. Due to the porosity of the foam surface is treated with primer deep penetration.

Summing up

Few know how to plaster blocks, with no less responsibility is necessary to approach the issue of their painting. This is done by special facade silicone or silicate paints, which have high vapor permeability.

In order to more accurately understand the technological and practical issues on our website provides detailed photo and video instruction, in which you will find the necessary information on the question.