Blind area called the coverage of a certain width, which surrounds the house on the perimeter. Doing this coating at the final stage of construction, after finishing part of the basement. The material used concrete, asphalt, paving tiles. One of the most popular materials is paving slabs. Paving slabs have high strength, frost and abrasion resistance, huge selection of drawing surfaces, colors, different textures, attractive appearance and reasonable price.
Blind area around the house is used for the following tasks:
Protect the Foundation from rain and meltwater. Atmospheric precipitation and melt water due to the construction of the coating will not have prolonged contact with the Foundation and will not be able to render negative influence. Water drains from the pavement to the side of the Foundation.
Additional insulation of the Foundation. A properly arranged blind area reduces the freezing of the soil and the Foundation. In addition, by reducing soil freezing around the home reduces the risk of swelling of the soil, and the Foundation will be subjected to lower loads due to changes of the soil.
Convenient access to any point on the perimeter of the house. This is utilitarian (practical) function, which is important in the operation of the house. The care of the blind area does not require a lot of time, but the solution to different economic problems in the future would be much easier.
Give a finished and beautiful appearance to your home. Decorative function is important but not the main function performed by the blind area. However, people attach the greatest importance.
There are some requirements that you must follow when applying the coating:
The deck must be continuous around the entire house.
Its width should not be less than 60 cm, but in any case it should be wider than the eaves a minimum of 20 cm For better protection of the Foundation from atmospheric precipitation and melt water coating thickness, it is advisable to increase.
The pavement should be constructed with a slope from the house 3-5%. The draft angle depends on the type used for coating material. For paving will be enough slope 3%. That’s right-slant is to protect the Foundation of your home and dump the water away from him.
The task underlying layer to create a solid Foundation under the top layer. The underlying layer can be laid of rubble, gravel and sand. The use of clay in the underlying layer will provide additional waterproofing. In practice, often found underlying layer of concrete (similar footing in Foundation of a house or for construction of roads). By itself, the concrete in our climate is not very practical for the device top layer of pavement. Coating of concrete will quickly lose their appearance and will always require repair. For the device top layer should be waterproof, used asphalt, paving stones, paving tiles (beautiful, reliable, but expensive) and paving tile.
Work begins on the subbase installation with excavation around the perimeter of the house. For ordinary soils is sufficient to remove the ground with a bayonet spade, but for the heaving will need to remove soil up to 30 cm the Soil is removed with the formation of already slope away from the Foundation. It will be enough to make the slope of 3%. Thoroughly clean the roots of trees and plants.
The trench width should be equal to the width of the blind area. It should be remembered that this width should not be less than 60 cm, while at least 20 cm wider than the eaves.
On the bottom of the trench is laid and carefully compacted clay. In order to avoid problems with the walls of the trench, it is possible to strengthen their simplest forms or curbs. The clay can be replaced by strong waterproof tape. In this case, the film must be equipped to go to the Foundation of the house above the level of coverage.
Then filled with sand, closed with a geotextile, then gravel. Geotextiles do not allow the destruction of the layer of sand under the influence of the weather phenomena. In addition, gravel with geotextile will perform a drainage function, and to take water from «pie» blind area.
There is recommendation to use herbicides to combat the plant. So the grass and plant roots will not destroy the coating. The effectiveness of this method will not speak, but harm the herbicides your site can bring a lot. Water trapped in the ground, they begin their «journey», and no one knows where will end up. It is possible that carrots or apples to your site will contain herbicides, you with your hands made in the ground. Lay on the bottom of the trench geotextile and grass with weeds, the pavement won’t hurt. Securely and without any chemicals.
For paving on a layer of crushed stone should be laid with a thin layer of sand, again pre-Mat geotextiles. The geotextile prevents gravel from clogging with sand, and allow it to effectively carry out drainage function. All layers are performed with preservation of the set incline to 3%.
The drainage channel paving is made from gravel laid in a drainage pipe. The pipe in this case is placed to far from the house edge of the underlying layer. The pipe can be laid near «pie» coating layer at the lower part of the gravel layer. Pre-drainage pipe covered with geotextile. This will allow you to avoid falling into the tube of soil particles and sand will cause clogging.
Paving slabs as a cover to lay on a mixture of sand and cement. This composition is called gartsovka. Under the influence of water a mixture of sand and cement will set and will not be leached in the future. This mixture is poured, the joints between the paving tiles. Tiles are laid on the mixture, tamp with a rubber mallet and are aligned in the same plane. Do not forget about the need to maintain the desired slope from the house. After the completion of laying tiles, the remains of gartovka sweep, and the tiles shed water. Around the perimeter of the cover fit curb. The curb height should not protrude above the level of the pavement and thus prevent the flow of water.
The pavement tiles are laid in rows. The coating should not fit tightly to the Foundation of the house. You need to leave expansion joint. Under the influence of the soil Foundation and the blind area due to different weight of the structure will be different and tight to the base of the tile can damage the material, which faced the basement.
Another advantage of paving slabs as a material for coating is the ability to replace damaged areas without compromising the entire blind area.
The insulation of the blind area, do not in all cases. Mandatory insulation is slightly deepened in the Foundation and heaving soils. In other cases it is desirable. As insulation, it is recommended to use expanded clay or polystyrene foam. The most popular form of polystyrene – PENOPLEX.
The clay layer («clay castle») or soft waterproofing poured a thin levelling layer of sand, over which are placed plates PENOPLEX. Further layers «pie» blind area can be performed, as mentioned above, however, polystyrene is required to protect getrootalias coating.
Insulation of expanded clay to make it even easier. It is filled with layers of gravel and due to its qualities, insulates the pavement.
Concrete blind area can be made a cake from «clay castle» or soft waterproofing, sand, which acts as a shock absorber, and gravel. For insulation, coating gravel to be replaced with expanded clay. The thickness of the layer of gravel is 5 cm Concrete cover reinforced with grid with cells 10×10 cm expansion joints, which will protect concrete floor from cracking, are made of thin wooden planks, set on edge across the pavement. Set the plates in increments of 2.5 m. it is Advisable to coat them with bitumen. Timber set to the height of the concrete pavement with a slope from the house.
Concrete will be poured. When aligning the surface plates will serve as beacons. The thickness of the layer of concrete when reinforcement grid is 10 cm.
Experts advise salesnet filled concrete having a wet surface cement lining and metal trowel. This method will increase the surface moisture of the concrete. Concrete cover is closed and periodically shed water. Doing so before complete hardening of the coating.
For the construction of the blind area of concrete sufficient to use cement M100, M200 max. Higher brand use does not make sense, including because of the higher prices.
Paving slabs laid on a Foundation of concrete on a special adhesive (quite expensive), gartsovku (this method requires certain skills and experience. Look at «fruit» the work of many teams of workers trying to put the tile in the gartsovka, and then a year later covering requires repair) and conventional wet mortar of sand and cement.
Paving slabs are first decomposed and checked pattern. In places that require trimming, tile is marked with.
Then the tile is removed and the substrate using a trowel to apply a layer of mortar thickness of 2-3 cm tile is Laid and is fitting with a rubber mallet.
For precise adherence to the size of the stitches used special plastic crosses. It is important to closely follow the slope of the plane of the tile. Let the solution grasp and proceed to grout after 2-3 days. Seams are gartsovka and spilled cold water.
We reviewed the highlights of the device is complicated «pie» of pavement with a coating of paving slabs. Someone decides that it can be easier, but about waterproofing, drainage, expansion joints in concrete pavement should not be forgotten. To a year not to remake. Beautiful and durable all pavings!