Foundation Waterproofing

The underground part of the house, adjacent to the ground, is exposed to groundwater and capillary suction. To protect the foundation from the effects of the impact, it is necessary to perform vertical and horizontal waterproofing of the foundation. For this, different types of waterproofing are used (coating, roll, permeable, injection) or concrete with hydrophobic additives is used. Since houses are designed in different places, each plot of land has its own characteristics.

House designs include waterproofing of foundations, which is affected by various factors:

• soil type;

• groundwater level;

• nature of the relief;

• presence / absence of a basement or ground floor.

According to hydraulic conditions, soils are divided into:

• permeable;

• waterproof.

It should be noted that typical cottage designs and house designs already have certain structural and technological aspects of waterproofing built into them. In particular, the location of basement floors plays an important role: above or below the groundwater level, as there is a risk of flooding. Also, underground parts of buildings are exposed to precipitation, which penetrates into the permeable layers of the soil. To protect the building from the effects of atmospheric water, a blind area is made along the perimeter.

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In permeable soils, rain and melt water quickly seep into deeper soil layers and there is a risk of capillary suction. Such soil moisture can rise through the structure by capillary action to a height of up to 1.0 m above the water table.

Typically, vertical and horizontal waterproofing is used to cut off water and prevent moisture from entering the foundations and underground parts of the building, which should also be "prescribed" at the "house design" stage.

Horizontal waterproofing

The classic solution is two layers of roofing felt on bitumen mastic and glued to the foundation with it. The modern solution is a waterproofing membrane film. It is mounted on top of the foundation head (foundation walls), at least 20 cm above the projected ground level. Before laying the membrane film on top of the foundations, it is necessary to level the foundation with a cement mortar.

If the soil is not very moist, and the base of the foundations is designed above the groundwater level, horizontal waterproofing is performed, which is performed in two places: the first time - directly along the foundation strip, and the second - at a height of 20-40 cm above the ground level, but below the ceiling above the basement or basement.

When designing houses,

It is worth using vertical waterproofing (for wet soils). Usually, this is 2 layers of Euroisol on bitumen mastic, which are laid along the outer part of the foundation wall, such a structure is further insulated along the perimeter of the EPSP and protected with a geomembrane (if necessary).

As an alternative, it is possible to propose the use of hydrophobic concrete, which allows reducing the labor intensity of the work without increasing the estimated cost of performing the work below the zero cycle.

If hydrogeological conditions require drainage of the area near the designed facility, multilayer insulation made of a profiled membrane and geotextile is used for this purpose.