How to make the drainage of foundation of the house with his own hands - detailed instruction

When building a house in an area with a high level of groundwater, on clay soil or in the planning of the basement with a large recessed necessary to take into account the risk of flooding the basement.It increases the probability for a large amount of precipitation, a small slope at the site, incorrect calculation of sewage.Even irregular and neobilnye flooding can negatively affect the strength of the foundation, cause dampness and mold and lead to the destruction of the house.Protect the building can be, equipping the house foundation drainage.

For homes located on the sandy soil does not freeze more than 80 cm, drainage facility is not required, but a thorough basement waterproofing - obligatory.

What drainage fit?

Around the house with a mezzanine exploited or basements trim needed drainage.He dug around the basement and is equipped with a manhole at the corners.Facilities such drainage is necessary to attend more in the construction of the foundation, so after construction will make it much more difficult and costly.

If the house does not have a deep basement, it is possible the construction trench (ring) drain at a distance of three meters and a half-from the foundation with an additional protective layer of clay.These trenches can be used for stormwater.

Preparation and selection of materials

Before excavation work is necessary to determine the necessary material.

1. Today PVC pipe or polypropylene for drainage systems - the best option.They are lightweight, do not corrode due to the action of groundwater and the installation of the drainage is simple.Specialized for drainage pipes have a diameter of 11 cm and a perforated portion of the surface in the form of two wide longitudinal strips.It is possible to use cheaper and pipes without perforations uniformly drilled holes using a drill in several rows at a distance of 6 cm from each other.It should be noted that in the future the tube must be placed so that the holes are on the sides.Between a pipe couplings are connected.
2. To protect the pipes from clogging geotextile is used , it is used as a lining under the rubble, preventing rapid siltation.This membrane, which diverts water to the pipes, but holds larger particles.
3. To monitor the condition of the drainage system and, if necessary, wash it in certain places to install manholes.Their number is equal to the number of turns in the system, plus one in the place of the water drain.

Post drainage gasket must be careful with the foundation waterproofing.It is necessary to process the bitumen primer, then apply the mastic in two layers, placing between them a reinforcing grid with cells 2 * 2 cm. The second layer of mastic applied only after the previous one has dried, not earlier than one day.

Earthwork

before laying pipes dug a trench along the walls of the house at a distance of about one meter from them or from the blind area, if any.Advance using the level necessary to find the lowest point of the foundation, and this corner is uppermost part located drainage.Trench digging better it is from this point, deepening them so that the pipes were at an angle of approximately 1 cm every 2 meters, so that water does not accumulate and can drain.The slope may be more if the land is often heat a little, or the water table is close to the surface.

width of the trench should be such as to accommodate the pipe and gravel layer 10 cm around it, that is about 30 cm. At the bottom of the pit pour a layer of sand 5-10 cm thick. On the sand laid geotextile layer so that the ends out for thethe trench evenly on both sides.Above is poured a layer of gravel fractions 20-40 10 cm thick.

Pipe laying

After the preparatory work can start laying the pipes, wrap a layer of geotextile, constantly controlling the level of assistance that the correct slope is observed.In the corners of the bends are made at an angle of 45 degrees, from which then rise to the surface manholes, close lid.The well should be located not at the corner, but not further 20 m away, on the straight sections of a revision every 40 m.

laid pipes on the sides and the top layer backfilled with gravel.Then on top of it overlapping stacked loose ends of geotextile, as if wrapping the whole pie.The ends of the fabric are stitched or fastened with metal clamps.On top of the geotextile is filled with a layer of sand, which in itself is a drain.

At the lowest point of the drainage system shall be connected to the receiver for water.To do this, dug a deep hole, the bottom of which is lined with geotextile, it is installed capacity, such as plastic barrels, at the lower edge of which is done a number of holes.Drainage well may be constructed of concrete rings (as described here), or cast in concrete.It will drain water from the system.On top of the drainage pit should be tightly closed hatch, it is desirable that he was also insulated with foam.

Properly executed drainage will protect the foundation of the house by washing away, to avoid the appearance of mold on it and increase the service life of the entire structure.