Do-it-yourself foundation slab for a house: the technological process of pouring

Do-it-yourself foundation slab for a house: the technological process of pouring Over the years of various experiments and practices, experts have come to the conclusion that the most reliable foundation is the foundation slab for the house, and namely monolithic type. It is suitable for heavy buildings.

The cost of installing this type of foundation is considerable, therefore, before giving preference to just such a foundation for a house, you should weigh the pros and cons, perhaps a less expensive option will suit you, based on the characteristics of your structure.

In this article we will talk about the features of pouring a foundation slab under a house made of concrete, aerated concrete, monolithic reinforced concrete structures. Consider all the pros and cons, the norms for working with this type of base, as well as all the technological processes and nuances that must be observed for a high-quality installation.

Learn what preparatory work should be done before pouring concrete.

Features of the foundation slab for the house


This type of slab refers to monoliths, in other words, this base is pointed floating method at shallow depth. After low tide, a huge heavy and durable slab is formed, on which the house will be erected in the future.

Before pouring the reinforced concrete mixture, builders create a so-called cushion of gravel and sand, the main task of which is the correct distribution of the load from the house. Such a foundation is considered the most reliable if the construction of a house is carried out in an area where the soil freezes very deeply, and the soil is characterized by instability.


Reinforced concrete foundation slab is rightfully considered the best option for aerated concrete houses, taking into account its technical characteristics. In addition, the stove can be ordered ready-made, or you can do everything yourself according to instructions from specialists.

Do-it-yourself foundation slab for a house: the technological process of pouring In order to pour the foundation slab under the house with your own hands, you need to order a concrete mixer with a ready-made reinforced concrete solution and pour into the prepared pit. The main thing is to observe the technology of work.

Among other advantages of the foundation slab, it is worth noting that there is no need to dig out a deep hole for pouring the mortar, a depth of 15 - 40 cm is enough.This allows you to reduce the volume of material used by 1/3 of the total mass for other types of bases ... It will take much less time to pour the foundation slab.

It is worth noting that all these advantages relate to the bases of a shallow type, for a monolithic reinforced concrete foundation slab with the creation of a basement and a basement, you will need cash investments and labor costs.

In the case of building a house on unstable soil with a basement, the foundation slab will become irreplaceable. It will serve as a floor for the first floor of the building. It is clear that the cost of work and material will be high, but approximately 50% of all costs will pay off over time with a high level of reliability and strength.

A foundation slab for a monolithic type house is used in the Scandinavian countries, on the ground with a low freezing point, and the effect of thermal insulation is won with the help of insulation materials.

Foundation slab under the house and its types


Do-it-yourself foundation slab for a house: the technological process of pouring Installed on a sand cushion under a foundation slab with added gravel. Materials for thermal insulation are used at the discretion of the builders. Reinforced concrete is poured with a thickness of 20 - 50 cm. It depends on the expected load on the foundation. Before filling the gravel with sand, the layer of fertile soil must be removed.

Swedish insulated board

It is characterized by the least heat loss due to the organization of expanded polystyrene formwork. Heated floors are laid on top, which must be poured with a concrete solution of 10 cm. All communications necessary for the house must be laid at the stage of laying a sand and gravel pillow. This type of slab can reduce the building time, but at the same time it is considered one of the most costly, and it will not work to do it yourself. In this case, we need specialists who can calculate everything according to the rules.

Russian foundation slab

Provides for the presence of additional stiffeners of the foundation slab under the supporting structures and in places of maximum load on the base. The advantage of this type of slab is its special reliability and strength, the disadvantage is the increase in the building time.

Important !

In order to create a solid foundation for any type of building, it is necessary to use only high quality materials.

Production of a foundation with a slab

The main material is concrete for the foundation slab, which must have the following quality indicators

  • Water resistance not less than W8 coefficient.
  • Strength at the level of M300 class.

  • Mobility index P-3
  • Frost resistance coefficient F-200.

Note. Areas with high groundwater levels require the use of sulfate-resistant concrete.

The foundation slab reinforcement is selected taking into account certain features of the foundation pouring. Reinforcement of any type is suitable for traditional slabs If welding with other parts is planned, then the choice must be stopped on fittings made of steel of the A500C class, the diameter of which is not less than 12 mm.

Do-it-yourself foundation slab for a house: the technological process of pouring

Polymeric bituminous materials are used for the purpose of waterproofing under the foundation slab. The material is sold in rolls. Also, other waterproofing materials with a good set of characteristics are offered for the choice of buyers. For example, they are not allowed to freeze in winter and melt from the sun in summer.

Do not forget also about the fact that various heaters are used to insulate the foundation slab.

Previously, polystyrene was popular, nowadays they use expanded polystyrene, which has excellent thermal insulation qualities, is durable and does not decay.

In order to fill a low-depth foundation slab with your own hands, you need to stock up on all the necessary tools. You will need: concrete mortar, slats for leveling it, reinforcement, shuttering board, building level, hammer, jute for marking the site, shovels and bayonet shovels, hacksaw, ax, hooks and wire. Rent a concrete mixer, as well as equipment for digging a foundation pit.

In order for all the work on pouring the foundation to be efficient, make accurate calculations of the area and the load on the foundation.

Determine the risks of deformation, shrinkage and roll of the base under the house. Next, you need to dig a pit and lay the bottom with geotextiles under the foundation slab in order to avoid mixing the cushion of sand and gravel with the ground. The next step is to backfill the cushion of gravel and sand in layers. Each backfilled layer of the foundation slab must be compacted with a vibrating plate and communication systems must be installed when using a Swedish foundation. Upon completion of the preparatory work, a concrete solution is poured.

Note. The concrete is poured all at once, and then treated with a deep vibrating plate in order to avoid the formation of layers and voids inside.

The poured foundation slab matures within a month, and gains its strength over a period that depends on the ambient temperature. In the process of drying the concrete base, you need to irrigate it with water, especially when it is hot outside. In addition, the foundation must be covered with plastic wrap so that rain, various debris and dirt do not fall on it.

( 1 grade, average 5 of 5 )