How to build a formwork for the foundation

You will need
  • - me;
  • - nails;
  • - screws;
  • - metal pipes;
  • - expanded polystyrene;
  • - metal rods;
  • - Sand and gravel;
  • - fittings;
  • - polyethylene film.
Instruction
High-quality formwork must withstand the pressure of concrete poured into it, without changing its geometric shape. Additionally, you should take care of hermetic insulation of the formwork to prevent leakage of the solution.
As a formwork, you can use a wooden, steel or polystyrene foam frame. For a columnar foundation, formwork is often installed from metal pipes of a certain diameter.
When installing metal formwork, it is possible to quickly resolve the issue of the future foundation configuration. Metal can be bent at any angle and give the structure the necessary geometric shape.
Reinforced concrete formwork installed in industrial construction, as their cost is high enough.Expanded polystyrene formwork can be bought at the building materials store or rented. The advantages of the installation of this design are in the ease of installation, disassembly and affordable price.
Before installing the formwork of any materials, make the necessary markings of the vertical and horizontal surface, install metal rods, which will be used to dig the foundation pit. Strengthen the bottom of the pit with sand and gravel. Then proceed to the immediate installation of formwork.
All formwork elements are erected directly before the installation of the reinforcement cage, if the formwork itself is removable or after installation, if you plan not to disassemble the formwork and leave it as the foundation.
If the foundation is strong enough, struts should be made on the outside of the formwork. Without them, the construction can not withstand the mass of the concrete solution, which will lead to the destruction of the already installed formwork.
Inside the wooden formwork sheathe plastic wrap. This will help prevent leakage of the mortar, and the foundation will be more even.
It is possible to fill in the foundation immediately after the installation of the formwork. If you have carefully reinforced everything, the formwork can withstand the onslaught of the entire mass of the concrete solution. Properly installed formwork allows you to fill the foundation entirely using imported concrete. You can not be afraid that at the most crucial moment your formwork will fall apart.


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