Choosing the best foundation for a house made of aerated concrete

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Choosing the best foundation for a house made of aerated concrete

Many people who are faced with construction for the first time are puzzled over what is the best foundation for aerated concrete houses.

In this case, the opinions vary considerably.

Some believe that due to the fact that the aerated concrete house has a small weight, it does not need a massive foundation( both for a single-storey building and a two-storey building).

Others pay attention to the relative fragility of aerated concrete blocks and insist that the foundation should be very strong so that a single-storey house( and the more so, a two-storey house) can have the longest possible service life and can be installed in places with high seismic activity.

In fact, both are right. The design of the foundation should include calculating the weight and fragility of materials, and also taking into account the ground conditions of the proposed site of construction.

Basically, experts consider such issues and calculations, but if you try, you can do all the work yourself( but without using the construction equipment during installation, in some cases, still not do).

Let's figure out what constitutes a foundation laying, and what is the best foundation for a house made of aerated concrete.

Contents:

  • Basement
  • Foundation types
  • Prefabricated and monolithic structures
  • Base plate
  • Pile foundation
  • Foundation TISE
  • Conclusion

Foundation selection

From the foundation installation, the construction of any building begins, no matter whether it is a residential house, a sauna or a barn.

The foundation should be made as much as possible, because if the roof, walls and windows of construction can be dismantled and replaced, then with the foundation this issue is much more difficult to solve.

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That's why, when choosing materials for the basis of a house you can never save.

Let the building be of a smaller size, but at the same time stand on a firm foundation than to have a large area, but be on a walking ground.

The choice of the foundation for a house made of aerated concrete should not be hasty and be based on someone's incompetent recommendations.

It is also necessary to correctly calculate and its material capabilities, not every kind of foundation can afford a common man in the street.

At the same time, the size of the base must be clearly adapted to the dimensions of the designed house, the mismatch of dimensions can also negatively affect the construction.

Carry out a check calculation before installing again. It would be stupid to be where you can safely hold a columnar foundation, install a monolithic foundation 3 meters deep.

Or carry out construction, not taking into account seasonal changes in the level of groundwater, which can lead to water ingress to the ground floor or to the basement.

If the base is not installed properly, then you may not have to close the doors, break windows in the windows, plaster fall off the walls and ceiling( and this is the least problem of those that may appear in the future).

In order not to make such errors and make the correct calculation, we will consider different versions of the bases, so that it would be easier to understand which one is better to choose.

Types of foundation

The most common houses built of their aerated concrete blocks are installed:

  • belt;
  • plate;
  • pile foundation.

Each of them requires certain installation rules and a different level of work performed.
Tape base for a house made of aerated concrete takes the palm of popularity in popularity.

It is a continuous reinforced concrete tape, which is laid under the bearing walls of the building.

The dimensions of the tape( its width and depth) are determined individually for each building, taking into account the ground conditions of the site being built.

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If there is a basement floor in the erected house, then the shallow-laid strip foundation is suitable for this purpose.

The tape base can be of two types: composite and monolithic.

Prefabricated and solid construction

Prefabricated strip foundation has certain features:

  1. To keep the structure seismic, the upper row of blocks must be reinforced with a monolithic belt;
  2. If the installation of a monolithic belt is not possible, then it is necessary to reinforce the bandaging of the blocks.

Monolithic tape foundation does not have such problems, therefore it is more often used for aerated concrete. It has uniform rigidity, which is extremely important when the substrate settles.

Only when laying a monolithic strip foundation, it is necessary to remember a certain calculation: the upper edge of the tape along the width should not be already blocks, more than ¼( in other words, the blocks of aerated concrete should not be protruded above the base of the house).

Base plate

The thickness of the slab monolithic base, as a rule, starts from 20 cm( this is a shallow foundation), but even with this comparatively small thickness it has the highest load-bearing capacity.

Basically, such a foundation is installed in areas with increased seismic activity, as the project increases the resistance of the building during earthquakes.

Basement made of aerated concrete

If all the work is done correctly, then the uneven sediment of the ground under the base, you also do not face.
Plates assume a waterproofing to protect the ground floor from groundwater.

All the technical characteristics of this base of aerated concrete house are exceptionally positive, but there is one thing that makes it more difficult - this is the price.

The calculation of the cost of such construction is far from being budgetary.

As an alternative and cost saving, the base plates are used as the floor of the basement( if there is one).

As an option, instead of plates you can use PBS blocks. Such blocks are made of special building material intended for the erection of a prefabricated basement.

The material is notable for its low cost and durability. A large size FBS blocks, allows you to establish the base in record time.

Pile foundation

The pile foundation project involves the installation of individual piles, which will be covered with a reinforced concrete monolithic slab or a special beam( grillage method) from above.

The grillage version of the foundation, in this case, is considered more profitable.

Pile foundation is popular in that it is not necessary to dig a whole foundation pit for it, which makes it possible to reduce the amount of money spent on excavation.

For the production of piles of such bases use:

  • wood( the most economical option, but also the shortest, such a foundation will last for a maximum of 10 years);
  • concrete;
  • reinforced concrete( able to withstand the maximum loads, but since we take into account the house of aerated concrete, which has a small weight, there is no need to install it);
  • steel;
  • combined materials.

Pile foundations can be used on ground with a high level of groundwater and even on driftwood. Such a foundation is even used to create buildings in St. Petersburg and Venice.

The video below provides a detailed diagram of the work on the installation of a pile foundation for a house made of aerated concrete.

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Foundations of TISE

A relatively new type of columnar or columnar-tape foundation, in which special bores form wells for poles having an extension bottom.

In the form of pillars are reinforced concrete piles, associated with a reinforced concrete grillage.

The so-called TISE technology allows to reduce the amount of work, the amount of building materials and save on the use of labor.

This has made the TISE method extremely popular recently.

The hemispherical extensions in the lower parts of the piles give them a special shape, which allows achieving a high level of reliability and strength of the products.

Piles make it possible to install the house on a heaving ground and are perfect for a house made of aerated concrete, so the foundation of TISE should also be considered as an option for such a building.

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Conclusion

We have discussed different types of bases. When choosing the base for a house made of aerated concrete, do not forget to pay attention to the service life of the materials used.

Belt, slab or pile foundation will stand for more than a century, if you correctly perform all the work on its device.

The pillar foundation is usually given about 50 years of operation.

So make a choice in view of all the information presented above and remember - measure seven times, cut once, this proverb approaches the installation of the foundation just in time.

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