Why the concrete blind area is bad: secrets to improve the blind area so that it serves 50 years

Many people forget about the blind area or leave it for later. Although this is a guarantee of protection against the destruction of the foundation, which occurs during frost heaving of the soil, precipitation.

The lopsided corners of the house, cracks in the walls, the "dispersed" foundation - all this suggests that there is no blind area.

Many people choose the concrete blind area, hoping for a long service. However, after 2-3 years, the concrete begins to crack and crumble.

To avoid this, do not make the blind area monolithic around the entire perimeter. It is necessary to divide the structure into slabs with a length of 2 m. The gaps between the slabs can be closed with tile adhesive. This is the only way to avoid cracks and destruction of the concrete blind area.

To prevent the concrete from crumbling, the components should be strictly dosed (cement, crushed stone up to 20 mm, water and sand). It is impossible to do this on the "eye". Incorrect mixing algorithm is also a common mistake.

The proportions are approximately as follows: cement M400 - 300 kg., Crushed stone - 1030 kg., Sand 730 kg, water 200 liters. In a concrete mixer or a large basin, first the dry components are mixed, and then water is poured.

Concrete is preferable because it is easy and understandable to work with. Just expose the formwork and pour.

You can not make a narrow blind area. It will not protect the foundation of the house.

Focus on the roof overhang. The blind area should be about 25 cm wider.

Making the tilt angle is also important. There will be no accumulation of water. The angle of the blind area from the walls of the house must be at least 5 degrees.

When equipping the blind area, you need to think about storm water inlets. They are placed under the gutters.

For the concrete blind area to serve for a long time (up to 50 years), has been flat for many years, use the method ironwork. This will strengthen the surface and increase waterproofing, strength, and hardness. Ironing can be dry, wet or using polymer impregnation. The simplest is the dry option. After an hour or two (after filling the blind area), sprinkle dry cement on top. Try to apply an even layer. Convenient to do with a sieve. The final stage is to level the layer with a float.