How to make the formwork around the house correctly?

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Determine the width of the blind area

The formwork around the house, or as it is also called, the blind area is a wide strip, often concrete, which is erected along the perimeter of the building. Its main function is to remove atmospheric precipitation from the foundation. It allows to strengthen the waterproofing of both the foundation itself and the walls of the structure in the lower part. In addition, the blind area serves as a decorative element that makes the appearance of the house complete.

It is recommended to build a blind with a width of one meter. However, its width, in many respects, depends not only on the comfortable movement along it and the desire of the owner, but also on the distance of the roof from the perimeter of the building. To determine the optimal width, 30 centimeters are added to the departure point of the roof. The result of addition will serve as the optimal width.

Important! In any case, it is not recommended to make the formwork already 60 centimeters, as the movement along it will not be convenient and will always have to rub against the walls of the house.

How to make a formwork around the house?

Consider how to make the formwork around the house yourself. The first step is to create the markup. For this, a projection with the help of a plumb line is made from the edge of the roof. To the line that turned out, the extra 30 centimeters of length are plus. However, the line that runs from the roof edge does not need to be considered basic, and the final size should be measured from the wall. Further, at the corners of the marking, the stakes are driven in, to which the markup cord is attached. Ideally, all angles should be 90 degrees.

Further, according to the marking, the upper layer of the soil is removed to a depth of 25 centimeters. After that, the formwork is assembled from boards or plywood. On the outside, the formwork is fixed with hammered stakes. The bigger the stakes, the less likely it is that the formwork is deformed under the pressure of concrete. A pillow of sand five centimeters thick is poured. The sand is trampled and thus wetted with water, after which 5 centimeters of crushed stone is poured on top.

A compensating suture is made between the blind and the socle from two layers of roofing material. It is also possible to apply mastic or foam polyethylene on the cap surface. This is done so that when the shrinkage of the house does not occur deformation of the blind area. After that, a reinforcing metal mesh is put. Important! If the groundwater is close to the surface, then you can make a waterproofing by placing the material overlapping the walls.

Fill the blind area of ​​the

Before pouring concrete, it is necessary to make a marking of gradients. Most often the slope is made from the house and parallel to the wall. The optimal inclination is 3-7 degrees. In order not to miscalculate with it, you need to make it before pouring concrete. The fill line on the formwork should be below the line on the plinth. In order not to be mistaken, the marks are transferred by means of a hydro level to the formwork. Further from the received line the line below is measured and so on. For better control of the gradient, you can pull the threads. To the wall they are fastened by fast erection, and to the formwork - by nails. The optimal step for their placement is about one meter.

Before filling with a step of two meters, expansion joints are made of materials with damping properties. They will not allow the rippling of the blind area during sudden changes in temperature. Then the concrete is poured. In the process, it is necessary to mount the elements of stormwater, if they are provided by your roof. After grasping the concrete along the threads with the help of the rule, the slopes are leveled to the required level. After that, the entire surface is covered with a polyethylene film to avoid uneven drying and cracking.

Important! If the weather is hot, then the formwork around the house is periodically wetted with water.

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