When deciding to build major buildings, each wizard faces the issue of the formwork device under the foundation. This constructive system is erected to mold concrete, it helps to withstand the necessary product parameters for the time of solidification of the solution.

Views and equipment

There are various types of formwork under the foundation, but the requirements for them are extended common: it should be durable and sealed, maintain unchanged shape and differ with a simple design.

Formwork shared on:

• removable, used more in private construction. The design is suitable for the construction of a ribbon foundation, then the above-ground part of the building becomes a basement. The work can use a wide variety of materials, but the most common wooden timber and board are the most common;
• full, designed more for boron borne foundations. A popular embodiment of a non-removable formwork is considered asbestos-cement pipe, which is filled with concrete and subsequently remains part of the finished design. Mainly for this type tend to use available materials: chipboard, MDF, foam board. Easy installation allows to erect buildings in a short time, without losing the quality characteristics.

Each type has its own advantages, therefore it is necessary to consider each in turn.

Payment

Preceded the building process calculation of resource consumption on formwork. It all depends on the selected material, so the question is to be considered on separate examples.

The most common option is a wooden design. On sale The board goes with a length of 6m, 100-150 mm wide, from 25 mm thick. To determine the required number of boards, two indicators are multiplied: first the perimeter of the foundation is divided into one boards for the length, then height is separated by its width.

Since the board is usually on sale goes in cubic meters, then for reference it is worth knowing: 1m3 \u003d 42 ... 64pcs. The exact number of boards depends on its width. Formworking costs are increasing due to a bar that serves as fastening and enhancing the design.

If we consider the metal formwork, the material consumption also depends on its parameters. Standard steel sheet comes with dimensions of 2500x1500x1 mm. Then the perimeter of the foundation is divided into a length of one product, height - on the width of the sheet. Move these indicators, the required number of sheets for procurement will be obtained. The manufacturer offers a metal on weight, so it is better to know in advance how much the purchase costs.

The polystyrene foam formwork fails to calculate on its own, you need to contact a specialist. It will be able to give the parameters of the future design, depending on the plan of the foundation and complexity of the nodes. The cost of such a formwork will be slightly lower than the metallic, while the process may also require help of professionals.

Common option

Often for small structures choose a ribbon foundation, then the construction process takes place in 4 stages:

• erection of formwork;
• arrangement of sand pillow;
• laying fittings;
• pouring concrete.

With a durable soil, the first item can be replaced by the ridge of the trenches, in other cases you will have to build a formwork of the ribbon foundation with your own hands.

Erecting a non-removable option

Formwork under the foundation is preparing in several stages:

• calculation of formwork power;
• land work, including digging trench of the respective parameters. With the arrangement of the trench, it is important to take into account the thickness of the formwork itself, professionals are recommended to additionally leave the stock of about 2 cm to access all elements during their installation. The bottom falls asleep by rubble or sand or concrete preparation is carried out - it subsequently reduces the loss of concrete when pouring. Also at this stage, the reinforcement is installed, designed to increase the foundation of the foundation;
• arrangement of formwork, the process depends on the selected material and parameters of the elements.

After the construction of the formwork is already mounting the frame and then poured concrete. After 25-30 days, concrete is frozen, and builders go to the next stage.

Metal and reinforced concrete non-removable formwork for the foundation is rarely used in private practice due to the price of the question. But there are undeniable advantages:

• steel sheet takes the necessary parameters of the foundation;
• it provides good waterproofing of the finished design;
• sheets with a thickness of 1-2 mm are ideal for the construction of a ribbon and monolithic foundation, the reinforcement frame may be welded to the formwork.

If we use reinforced concrete plates during arrangement, then as a rule, the consumption of concrete is significantly reduced. But you may need additional struts.

Experts offer to buy polystyrene designer, this option is considered practical and reliable. In order to build such a formwork, it is quite first to establish the reinforcement in the main nodes of the building, to fix blocks to it. Common elements are fixed with metal brackets or special foams. Among the advantages should be noted the possibility of obtaining angular and rounded forms, ensuring a waterproofing and insulation layer without additional measures. But there are also disadvantages - the assembly of polystyrene foam blocks takes a lot of time, so it is better to work with the assistant. In addition, you may need a professional assistance to determine the location of the reinforcement.

Since the main determining issue always remains financial costs, they independently make formwork for the foundation mainly of wood or submitted means. To implement the first option, they use paneur and boards, it does not require additional equipment during installation. In the second embodiment, tubes, slate, professional flooring, so it is the cheapest way. But the question is complicated by the assembly, especially with a different set of materials. In both options, additional gain and the connection of the elements may be required.

Using removable formwork

Private masters from removable options are the most popular wood design. It has undeniable advantages:

• simplicity of assembly with the same type - unnecessary wood can always sprinkle;
• when installing does not require a special tool, almost everything is in the arsenal of a homemade master or neighbors;
• for full savings, you can take a finished formwork for hire.

Since the construction of the foundation is the priority process, then the removed board with formwork can be further used in construction. Therefore, even the lack of price of material turns into dignity, the board is used in the arrangement of the floor or other structures.

Operation of work when installing a removable formwork of the foundation:

• training platform, markup;
• installation of construction supports, for this, the corners are driven by a wooden bar. It is worth considering that these backups should remain with the outer side of the formwork;
• fastening shields with nails or screws. It is important to withstand the vertical position of the elements and not allow the cracks between them more than 4 mm. The alleged places of the leakage of the solution are close to undergraduate means. Obtaining a smooth surface and close up of small gaps provides a construction oil-nailed with a stapler.

If you plan to pour a large amount of concrete, you will have to strengthen the design due to the severity of the solution. To do this, from the outdoor side, the struts are robbed with a periodicity of 70-80 cm. Another increase in the strengthening is strigs design, but then undesirable holes will remain in the design.

Construction of round shapes

The formwork device for the roundabout begins with the selection of the material. The design may consist of:

• plastic, then with the help of heating it is fused. The resulting design is not distinguished by durability, so plastic is suitable for small buildings;
• boards, in this case, the design is collected by the type of barrel. Such a formwork is withstanding significant loads, so it can be used for various buildings;
• plywood is rarely applied, because it is not always necessary to give the necessary form;
• polystyrene foam, the manufacturer ordered elements with the required parameters. The only minus of this option is the cost of formwork;
• metal, in this case, choose sheets with a thickness of 1 mm. But to impart the necessary form will have to use specialists with a professional instrument and equipment, which will affect the cost of the finished design.

After solving the main question, the course of the process does not differ from the above options. Before making a formwork for the foundation with your own hands, it is worth looking for ready-made frames - this will eliminate extra trouble during construction. Suppliers can find products of the necessary parameters, only to collect the design.

For clarity, it is worth viewing video arrangement of formwork under the foundation: