It is impossible to build a good, solid foundation that meets all GOST requirements for less than its actual cost. Savings come only at the expense of quality, so cutting foundation laying costs dramatically could lead to problems in the future. A reasonable customer sensibly assesses the ratio of the cost of work and materials to responsibly performed work. To lay a strong foundation for a house, the price must correspond to the quality.
Externally, a good foundation is no different from a bad one Source tr.decorexpro.com
What work is carried out when pouring a turnkey foundation?
The cost of pouring a turnkey foundation includes:
- The price for all necessary consumables.
- Delivery to the construction site.
- Payment for the services of special construction equipment for excavation work.
- Calculation and marking of the foundation, digging holes and pits, soil compaction work.
- Arrangement of drainage.
- Installation of high-quality formwork.
- Professional installation of a metal frame is carried out only by hand.
- Pouring concrete, the price in this case includes vibrating it for uniform spreading.
- Dismantling of formwork.
- Waterproofing works.
- Garbage removal.
Each of the above stages is a prerequisite for the construction of a permanent foundation for a future home.
The main types of work performed during the construction of the foundation
According to building standards, capital strip foundations are built for houses made of brick, stone and similar heavy materials. The construction of such a foundation is the most expensive in terms of cost, but at the same time the customer receives a guarantee that it is able to withstand the weight of the future structure.
Full sectional strip foundation Source shabashka-pro.ru
An important criterion here is the depth of the foundation base, which must be buried below the freezing level of the soil. Otherwise, heaving of the soil due to temperature changes will “raise” and deform the walls. This rule cannot be ignored both when pouring the foundation for a heavy brick house, and for a structure made of light materials - cellular concrete or wood.
The costs of installing good durable formwork, high-quality concrete and new reinforcement are quite justified. The foundation of the house must be strong. Only then will the new house delight more than one generation of residents.
To determine how much the foundation for a house costs when arranging it, you need to take into account the amount of work carried out at each stage of construction:
Preparatory work
Before starting work on building a house, you need to conduct a thorough inspection of the site. Large ravines, humps and hills should be razed into a single area, old stumps and trees should be uprooted - most often special equipment is used for this.
Difficult terrain significantly affects how much it will cost to lay the foundation for a house - clearing areas of the same size may require an order of magnitude more effort, and the estimate for this type of work must be discussed during the design.
Video description
What types of foundation are there? How is the foundation built and how much does it cost? See all this and much more in this issue.
Excavation
Even after geological soil testing has been carried out, excavation work can present a few surprises during its implementation. The very beginning of digging a pit will show how the groundwater lies, what is the qualitative composition of the soil, etc.
Also, the cost of a strip foundation per linear meter can include the arrangement of the initial concrete pad. This dramatically increases the service life of the waterproofing layer and prevents the possibility of subsidence of the reinforcement cage when pouring concrete.
Approximate prices at this stage are calculated as follows:
- Digging trenches with an excavator, 1 linear meter - 180 rubles.
- Filling the gravel bed and compacting it in 1 m.p. - 100 rubles
- Total 270 rubles per 1 m.p.
See also: Catalog of companies that specialize in foundation repair and design.
Reinforcement works
The price of the reinforcement used to lay the foundation significantly affects its overall cost. Experienced experts recommend using about 10 meters of steel rod 1.2 cm in diameter per 1 square meter of concrete pouring.
Ready-made strip foundation reinforcement Source bel-dom-stroy.ru
Steel reinforcement strengthens the concrete foundation very well, so you should not cut costs on it. To be sure of the intended use of the material, it is better for the customer to control this stage of work himself.
The price of work at this stage is calculated as follows:
- 1 meter of steel rod – 40 rubles.
- Required quantity per 1 linear meter – 4 pieces
- Installation price 15 rubles
- Total – 175 rubles.
Formwork work
This stage of work can only be omitted if the house is built on dense clay soil, which can become a natural restraining frame for concrete pouring. On sandy, unstable soils it is impossible to do without good formwork made of wooden panels.
Video description
What errors can occur when installing formwork - see clearly in the video:
Note! You should not save money and make collapsible formwork by pouring cement in several stages. The entire concrete solution must be laid at one time to avoid cold joints. Even minor cracks in the foundation body will leak over time.
This stage should be included in the overall estimate from the following calculation:
- The price of one OSB board is 200 rubles per square meter. The height of the foundation is usually 1.7 m, which means that per linear meter you need 200 * 1.7 = 340 rubles and multiply this amount by 2, since the formwork consists of two walls. As a result, we get 340*2=680 r/p.m.
- The price of wooden beams and self-tapping screws per 1 linear meter is 60 rubles
- The cost of assembly work is 150 rubles per linear meter.
- The final amount is 680+60+150=890 rubles per linear meter.
The cost may vary depending on various factors. For example, if deadlines are important, then permanent formwork can be used.
Differences between an insulated monolithic Swedish slab and a video about its construction
As mentioned earlier, the insulated slab under the house developed by Swedish builders is energy-saving. During its construction, permanent formwork made of extruded polystyrene foam is used. As a result, heat leakage into the ground is minimal. The second fundamental difference is the water heated floor system built into the slab.
Since engineering systems are poured deep into concrete, it requires accurate and competent calculations. High demands are also placed on execution. Even small mistakes are critical. You can make USP yourself, but it is better to order the project. See the following photo for an approximate breakdown of costs. The amounts are no longer relevant, but the percentages are correct. The cost of the foundation project is about 1%.
Approximate percentage of costs for a monolithic slab foundation
In the following videos you will see the stages of making a Swedish stove for a specific house. Many useful devices are described that will make work easier, and explanations are given for some of their features.
Video description
More clearly about the use of permanent formwork in the video:
Concrete works
Finally, the most crucial moment of installing the foundation comes - pouring the concrete mixture. On the one hand, everything is simple - concrete is poured into the formwork, leveled and left to wait until it hardens. But the fact is that this work must be carried out quickly, in one step and observing the necessary requirements, such as pouring speed and leveling method. If you level the mixture with a shovel, this disrupts the proportions of the mixture, so vibration is used here. Compaction of the cement-sand mixture seriously affects the density of already hardened concrete.
The calculation of the cost of the foundation per cube is carried out according to the following parameters:
- The width of the formwork is 50 centimeters (taking into account the expansion of the sole)
- The total height of the formwork is 1.7 meters
- The volume of concrete per 1 linear meter is 1x0.5x1.7 = 0.85 cubic meters.
All calculations can be carried out only if you have a foundation plan in hand Source stroy-podskazka.ru
- The price of 1 m³ of imported high-quality concrete mixture is 3,500 rubles
- When pouring a foundation, the labor price per cube is approximately one-third of the cost of concrete. Here it is approximately 3500/3 = 1165 rubles per cubic meter.
- The total cost of laying concrete will be approximately 0.85x(3500+1165) = 3965 r/l.m. It may vary somewhat depending on the quality of the concrete and other factors.
Scope and calculation features
The main purpose is to use it as a foundation on soft soils with a maximum load-bearing capacity of up to 2.5 kg/cm2. This includes sands - silty and medium density, clays and plastic loams, peat and moist soils. Moreover, it is the level of soil moisture that largely determines its load-bearing capacity - when wet, it literally “floats”, losing its strength properties. Therefore, drainage, waterproofing and blind areas play an important role in the arrangement of this type of foundation.
Reliable waterproofing is an important component of any foundation Source olestnicah.ru
One of the advantages is often given the argument that you can make a monolithic slab with your own hands. But even if we do not consider the issues of choosing the type of concrete and the parameters of the reinforcement frame, such an important stage remains as calculating the dimensions of the slab. And if there is a certain clarity with the area (the size of the house plus a small margin on each side), then the thickness of the slab is not easy to calculate.
The recommended range of foundation slab thickness for low-rise construction is 10-40 cm.
But this range also includes “light construction” in the form of a garage or summer kitchen, and a two-story house with an attic. If you make the slab not “thick” enough or choose the wrong thickness of the reinforcing rod (or cell size), then it will not be able to withstand the total load. An excessive margin of safety leads to an increase in the cost of an already expensive foundation, and an excessive amount of concreting will make the entire structure heavier, and the soil may not be able to withstand the total load.
There is another option with a diametrically opposite scope of application - the slab is installed on rocky and coarse soils with very high load-bearing properties. In this case, it rather levels the construction site rather than redistributing the load from the structure.
Another feature of this foundation is that the laying of pipelines must be done at the stage of the zero cycle Source xpcenter.ru
Final work
Any self-respecting construction organization always removes waste at the final stage of work. True, this results in additional costs for cleaning the site and transport for garbage removal, which are also included in the total estimate.
Total cost of construction of 1 m. strip foundation (with work)
If we take into account only the mandatory stages, without which it is fundamentally impossible to arrange the foundation, then the approximate cost of work per linear meter is as follows:
- Preparatory excavation work – 270 rubles.
- Laying and tying the reinforcement cage – 175 rubles.
- Formwork assembly – 890 rub.
- Pouring imported concrete – RUB 3,965.
The total cost is 5,300 rubles per linear meter.
Completely finished foundation for a building of complex shape Source kromvel.net
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