A blind area is laid along the perimeter of the entire structure, very tight to the foundation, and provides reliable protection of the building from rainwater and thawed snow. If the blind area is made qualitatively, then there is no need to be afraid that corrosion of the reinforcement, leaching of the soil and flooding of the building will occur. However, one should not be frivolous about this stage of construction, since mistakes made can then lead to undesirable consequences.
The first mistake is that builders incorrectly calculate the width of the blind area. If everything is much simpler with the length, since a blind area is made around the perimeter of the entire building, then some questions sometimes arise with the width. If the blind area is very narrow, then it will cease to fulfill its function correctly, water from the roof will fall onto the ground and erode it. The width of the blind area should be slightly larger than the width of the overhang of the roof, the difference should not be less than 20 cm.
The second mistake is the incorrectly created slope of the blind area, and the result will be puddles on it. The transverse slope should be at least 10%. An error can occur at the stage of concrete hardening, when it spreads with an even horizontal layer and the previously created transverse slope disappears. Therefore, builders need to control this.
The third mistake can be called violations that allow builders during concrete work. And the consequence of these violations are large cracks and chips. Errors arise at the stage of mixing bulk compositions, in case of non-compliance with the proportions and the algorithm for mixing them. It is important not to forget to place the bars of wood, which will relieve tension from the blind area and will not allow it to crack.
The fourth mistake is an uninsulated blind area. As a result, cracks and the effect of frost heaving can be obtained. It is necessary to select insulation material that will protect well from the cold and will not get wet during rain and snow melt.
The fifth mistake can be considered the created soft blind area without proper waterproofing. As a result, moisture penetrates deep into the blind areas and the conditions are not joyful for the foundation.
You can not save on the construction of the blind area, since the strength and durability of the entire structure, from the foundation to the walls, depend on it. Using modern materials, you can create a reliable and beautiful blind area.
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