Creating a solid support for the construction is quite a difficult process for labor and money. In order to estimate how much it costs to pour a monolithic foundation, let us outline the main stages on which money will have to be spent.
Make a geodetic analysis and calculation. The construction will serve you faithfully for many years if you correctly assess the soil and the level of groundwater location. The depth of the foundation itself and the thickness of the concrete pad depend on them. There are geodetic studies in Moscow and the Moscow region from 12 thousand rubles. , depending on the required analyzes and the complexity of the site, but if you wish, background information can be found on the Internet for free, including soil atlases of the desired area.
Step number 2
To carry out markings on the ground and perform earthworks. This is a time-consuming step, but it does not require much cash, if you plan to do everything on your own. Geotextiles are sometimes spread to the bottom of the excavated pit to hold the substrate of rubble and sand, as well as divert some of the moisture from the ground. The price for nonwoven fabric with a density of 200 g / m 2 is about 18 p. for 1 m 2 .
Step number 3
Pour a sand and gravel pad. Shed it with water and thoroughly ram the vibroplatform or roll it with a roller. Lay a hydroprotection of PVC film with a thickness of at least 100 microns over the pillow.
Thus, your expenses at this stage:
For bulk purchases, the cost of building materials will be significantly lower.
Installation of formwork
Step number 4
Installing removable formwork. The best option is to make it out of boards 6 meters long, 20 cm wide and 2.5 cm thick.
Calculate the area of the slab fencing, for this multiply the perimeter by the height of the boards. Similarly, the value of one board is considered. Dividing the first number by the second, get the number of the required timber. The price varies from 5500 rubles per 1 m 3 . You will only need to count the number of boards, say this number to the seller, and you will calculate how many cubes of the board you need to purchase.
It is economically unprofitable to buy a board, which is counted in running meters, as its cost will in most cases be unreasonably high.
It is also necessary to add the cost of nails, timber for lintels and supports, cord for marking and level control to the calculated amount.
So that the boards can be used again, cover their inside with glass or plastic wrap, holding together with a construction stapler. Then the costs of them also need to be considered.
Step number 5
Construction of reinforcement cage for stability and reliability of the plate. Metal rods with a cross section of 12 mm are most often used for reinforcement. They cost from 25 p. per meter for wholesale purchase.
They are laid in a grid with a step of 20 cm. You need to lay two layers of such a grid. Fasten the upper row with the lower one with the help of vertical posts every 50 cm. And here it is important to correctly calculate the total length of the rods.
Calculate how many rows will lie along the sides of the slab and what is their length. Since there are two reinforcement levels, multiply the total figure by 2. Here you need to add vertical posts, their number at the site is calculated similarly. Their length is equal to the distance between the belts, that is, the height of the foundation is minus 5 cm on each side. However, there is a faster way of counting - there are enough building calculators in the network that calculate the necessary materials for each type of foundation.
Add steel wire for rebar binding and rent or purchase a knitting machine to the amount of expenses. For fastening one intersection 30 cm of wire is required.
Step number 6
Pouring concrete into the prepared base frame. The required amount is quite easy to calculate due to the simple geometry of the working platform. Multiply the length by the width and height of the slab, and you will get the volume you need to get a smooth monolithic platform.
Keep in mind that the process must be carried out without interruption, so that no seams, weakening the structure, are formed inside.
For the preparation of 1 m 3 concrete, about 900 kg of cement, 0.8 m 3 rubble and 0.5 m 3 sand are necessary. The cost of 50 kg of cement brand M400 - from 200 rubles.
Whether you will interfere with the solution yourself or buy ready-made one is up to you. Prices for ready-made mixes with delivery start at 3 thousand rubles.for 1 m 3 concrete and strongly depend on the distance to the construction site and the volume of the order.
Do not forget to take into account the power consumption when pouring the foundation and hiring a concrete pump.
By following the step-by-step instructions, you can easily determine your expenses on the construction of a solid solid foundation. Add another 10% to the amount received to account for unforeseen expenses. If you can save some of your finances, spend them on continuing construction.
You have already erected a monolithic foundation yourself and you have good experience in calculating the cost of construction. Share it with our readers by leaving a comment on the article.