What are the sellers of aerated concrete / foam concrete hiding? Cellular Problems Leading to Home Destruction

Before building a house, you need to think about what material it is best to make it from. To make the house environmentally friendly, the walls were warm and did not freeze through, the noise from the street was not heard.

Today, many people choose cement-based aerated blocks for construction. Let's talk about foam concrete and aerated concrete.

What are the disadvantages that manufacturers are silent about?

The 2 materials differ in production technology. Lime, sand, cement, water and aluminum powder are added to aerated concrete. The foam block is made of cement, sand with the addition of foam and water. The main components of the two materials are the same. Therefore, he will talk about them in general.

Manufacturers say that this thermal insulation material is environmentally friendly, fire resistant. It has high vapor permeability, light weight and easy handling. It doesn't even need protection: paint or plaster. The price is moderate and high frost resistance. Wall thick in 40 cm. replaces a meter wall made of bricks. There are some pluses.

Why, then, does not everyone build houses from a foam block / aerated block?

In professional circles, these cellular materials are not so popular. We will tell you truthfully about the shortcomings, and what aerated concrete is silent about.

The material is very fragile and breaks right in the hands.

If you build a small house from the cheapest foam block (density from 250 kg / m3), then it will be warm, but not reliable. If you choose a material (up to 600 kg / m3), it will be reliable, but cold. Polyfoam has 25 kg / m3 and it is much more effective to insulate with such material. It is not cost-effective to use the foam block only for insulation.

Concrete for construction is compacted, but this is not enough. It is still being reinforced. This is the only way to get a more reliable design. You say: "So the foam block is also reinforced."

This is true, but the fittings in the foam block do not work! It will slide and saw through the porous block, destroying it.

When laying the gas block, the glue does not give tightness, and the walls are well blown by the wind. Therefore, the blocks must be plastered from 2 sides. Foam concrete is plastered 2 times, otherwise there will be cracks. By the way, first they are plastered with a mixture of M 150, and then with plaster on the grid.

The house from the gas block cools down as quickly as it heats up. Therefore, many people make a warm floor or have back-up heating in stock so as not to freeze.

Shrinkage. For 3-4 years, the gas block shrinks like any other material. small cracks appear. It does not matter if the building is erected with high quality, cracks appear like cobwebs in everyone.

And the last: the foam block needs a supporting frame (the material does not have a bearing capacity). Only in this case everything will be all right.