Usually, the blind area acts as a continuation of the sidewalk. However, this condition is not always observed, because it is not mandatory. As an example of this approach, we can consider a soft blind area. In addition to functional, it has decorative advantages. But before starting work, you must familiarize yourself with the technology of their implementation, as well as prepare the necessary materials.
The essence of the idea
You can diversify the exterior of the house using the solution described above. Paved and concrete paths are already boring, and they do not always look natural. With some types of foundations, they simply do not fit. For example, a pile-grillage base provides for the need to decorate the inner edge of the blind area with a hinged plinth. In this case, the ventilated interior space under the floor isclosed.
Main Features
If we are talking about solid blind areas, then their basic principle is to continue the yard cover and finish the basement. But the soft blind area is practically part of the front garden or flower bed, the last of which is adjacent to the house. As practice shows, such a coating is durable, strong and does not require major repairs. If we compare the complexity of the device and the complexity, then both types of blind areas are identical, but the layers are arranged in a different sequence.
Soft blind area
Soft blind area in the classical scheme provides for a well-compacted soil layer. If we are talking about a traditional design, then in it water is discharged along the coating and enters open trays. In the case of the described blind area, surface drainage takes on this role. In order to ensure the stabilization of the surface, a preparatory layer of coarse gravel should be made. The stones will evenly distribute the load and prevent shrinkage of the bulk coating.
The main slope can be provided with a layer of rubble. Leveling is achieved by a bulk layer of fine-grained material, which does not tend to heave. Usually sand is used for this, but slag or granite screenings can be used, if thermal insulation is necessary, expanded clay chips. The soft blind area should have a hydrobarrier. For this, geomembranes are usually laid, whichare used for waterproofing buildings and are sold under the brands "Isostud" or "Fundalin".
If we are talking about a strip foundation, then the blind area is located around the perimeter, like the usual one. Whereas with a pile-grillage foundation, the blind area is brought inward by 50 cm. This necessitates the arrangement of the blind area at the stage of foundation construction. The waterproofing barrier will not be damaged, and excavation will be more convenient.
Step by step instructions
If you will equip the blind area with your own hands, the step-by-step instructions presented in the article will help with this. At the first stage, it is necessary to carry out earthworks; for this, the soil should be removed by a trench, deepening 45 cm in relation to the lowest point of the site. The bottom must be at a constant level, so the work must be preceded by marking with a water level or a level.
When a do-it-yourself blind area is set up, step-by-step instructions must be studied before that. From it you can find out that the edges of the trench do not need to be strengthened, however, a ditch should be formed around the perimeter. It should locate the channels of the storm system. The bottom should be prepared, the soil compacted. It is usually backfilled with a layer of fine gravel.
Wetted greasy clay is laid on the leveled surface. The final thickness of the layer should be 20 cm. It is necessary to make a common plane and a tray for the storm channel from clay. Clay should be laid with a general slope towards the building. The device of a soft blind area around the house onThe next stage involves the stage of adding a layer of preparation. It must be sprinkled with water periodically to prevent cracks from forming. You can complete the device of the blind area after the legs stop sticking in the clay.
Providing storm water drainage
You can drain the liquid from the blind area into the drainage system. Effluent can be discharged into the soil, which will depend on the annual level of precipitation and the intensity of rains. The abundance of flowing liquid can erode the soil under the blind area and cause a strong slope of the hydro-barrier. As a result, the bulk layer will begin to erode.
If there is no drainage channel and a filter well nearby, then the discharge can be performed into the soil, moving away from the general drainage slope by about 10 m. Drainage pipes with a diameter of 100 mm are usually used to collect water. Products should be prepared by perforating the walls. The diameter of the holes can be equal to the limit of 16 to 20 mm.
Soft pavement around the house with backfilling with earth provides for wrapping pipes in needle-punched geotextiles. Despite the fact that the blind area has a high filtration capacity, protection will be needed in case of moisture migration from the muddy soil. At intersections and corners, the channels must be connected with cross or tee manifolds. It is important to ensure that there are upper taps that are needed for revision.
If drainage fittings are not used, inspection wells can be replaced with drain necks. Water is discharged into the trench, depthwhich reaches 1 m. It should be covered with rubble and fertile soil. A perforated pipe acts as a distributor.
Pie blind area
Clay preparation should be showered with a layer of rubble, which is located with some slope. The thickness of this preparation is 120 mm. The material fraction varies from 15 to 20 mm. You can alternate small and large filler. The slope is leveled with a layer of screenings or sand. The deviation from the horizon is 3:100.
The blind area of rubble will go under the house. From the border of the facade, it should be raised from 15 to 20 cm. The cake should be compacted as it is laid and watered. The stability of the layer improves at the border of crushed stone and clay. The surface of the sand after compaction is stretched by the rule, a membrane is spread on top. The crushed stone blind area is arranged in such a way that no additional bedding is carried out in the tray. As an exception, a few centimeters of a mixture of sand and gravel are used, with which you can create a slope for drainage channels.
Blind area for the well
The soft blind area of the well consists of a waterproofing film, which is covered with sand. From above it is possible to arrange a lawn or a decorative coating. The manufacture of such a system does not involve large physical or financial costs. Before starting work, it is necessary to remove the fertile soil around the well to a width ranging from 1.2 to 1.5 m.waterproofing film, the edge of which should be brought to the top ring.
Frost-resistant film can act as waterproofing, which is laid into the ground during the construction of foundations. You can fix the film on the ring with double-sided tape or a metal strip, through the latter fastening is carried out with screws or dowels. In the place where the film goes into a vertical position, a fold should be made. It will compensate for the displacement of the material and subsidence of the soil, which will prevent the destruction and damage of the decorative top layer. Sand can be poured on top and paving slabs, crushed stone, brick or paving stones can be laid. Sometimes the removed turf is simply returned to the place or lawn grass is sown.
Conclusion
Information on how a soft blind area for a pile-screw foundation is arranged was presented above. It should be remembered at the same time that work must begin with the formation of an expansion joint. This will waterproof the underground and prevent deformation of the basement. You can carry out work using a two-layer roofing material. Further earthworks are carried out. It is necessary to go deep by 0.3 m around the perimeter of the house and fill in materials with a rammer. At the final stage, a gutter is installed, the surface is covered with cobblestones or paving slabs.
