Removal of surface waters. Rainwater drainage from the roof of a private house Groundwater drainage system
Lecture on the topic: Engineering organization of the territory of populated areas.
Part 11: Organization of surface water runoff.
Organization of surface water runoff
The organization of the runoff of surface (storm and melt) water is directly related to the vertical planning of the territory. The organization of surface runoff is carried out with the help of a general drainage system, which is designed in such a way as to collect all the runoff of surface water from the territory and divert it to places of possible discharge or to treatment facilities, while preventing flooding of streets, low places and basements of buildings and structures.
Rice. 19. Schemes of surface runoff organization depending on the relief of the territory.
The main parameters characterizing rains are intensity, duration and frequency of rains.
When designing rainwater drainage, rainwater is taken into account, which gives the highest flow rates. That. for calculations, the average rain intensity for periods of various durations is taken.
All calculations are carried out according to the recommendations:
SNiP 23-01-99* Climatology and geophysics.
SNiP 2.04.03-85 Sewerage. Outdoor networks and facilities
The organization of surface drainage is carried out from all urban areas. For this purpose, open and closed drainage systems of the city are used, which lead surface runoff outside the city territory or to treatment facilities.
Rain network types (closed, open)
open network is a system of trays and ditches included in the cross profile of the streets, supplemented by other drainage, artificial and natural elements.
Closed- includes supply elements (street trays), an underground network of pipes (collectors), rain and manholes, as well as special-purpose units (outlets, water wells, overflow wells, etc.).
A mixed network has elements of an open and closed network.
closed rain network
Rainwater wells are installed to ensure complete interception of rainwater in places where the design relief is lowered, at exits from blocks, in front of intersections, from the side of the inflow of water, always outside the pedestrian lane (Fig. 20).
On the territory of residential development, rainwater wells are located at a distance of 150-300m from the watershed line.
On highways, storm water wells are placed depending on the longitudinal slopes (Table 4).
Rice. 20 Scheme of placement of storm water wells at intersections
.
Rice. 21. The location of storm water wells in terms of the highway.
1 - collector, 2 - drain branch, 3 - rainwater well, 4 - manhole.
The storm (rain) collector, located along the highway, is duplicated if the width of the carriageway of the highway exceeds 21 m or if the width of the highway in the red lines is more than 50 m (Fig. 21, c). In all other cases, the circuits shown in Fig. 21, a, b.
For ease of operation, the length of the storm sewer branch is limited to 40 m. It can have 2 storm water wells, at the junction of which a manhole is installed, however, in areas with a large volume of flow, the number of storm water wells can be increased (up to 3 at one point). With a branch length of up to 15 m and a sewage flow rate of at least 1 m / s, connection without a manhole is allowed. The diameter of the branches is taken within 200-300 mm. Recommended slope - 2-5%, but not less than 0.5%
If necessary, storm water wells are made combined: for receiving water from the roadway and for receiving water from drainage systems (drains).
Inspection wells are located in places where the direction of the route, the diameter and slope of pipes change, pipeline connections and intersections with underground networks are at the same level, in accordance with the terrain conditions (slopes), the volume of flow and the nature of the laid storm sewer collectors, on the storm (sewer) network.
On straight sections of the route, the spacing of manholes depends on the diameter of the drainpipes. The larger the diameter, the greater the distance between the wells. With a diameter of 0.2 ÷ 0.45 m, the distance between the wells should be no more than 50 m, and with a diameter of more than 2 m - a distance of 250 -300 m.
The storm collector, as an element of the storm sewer, is located on the built-up area of the city, depending on the overall layout of the entire storm network.
Storm sewer depth
depends on the geological conditions of the soil and the depth of freezing. If the soil does not freeze in the construction area, then the minimum depth of the drain is 0.7 m. Determination of the depth of laying is carried out in accordance with the requirements of the SNiP norms.
An ordinary drainage network is designed with a longitudinal slope of 50/00, but in flat terrain it is reduced to 40/00.
In flat areas, a minimum collector slope of 40/00 is accepted. Such a slope ensures the continuity of the movement (constancy) of storm water in the collector and prevents its silting.
The maximum slope of the collector is taken such that the speed of water movement is 7 m/s, and for metal collectors 10 m/s.
At large slopes, the collectors may fail due to the occurrence of water hammer.
Among the possible structures on the drainage network are overflow wells, arranged in areas with a large fall in relief, to reduce the speed of water movement in the collector, which exceeds the highest allowable norms. With significant extreme slopes of the terrain, fast currents, water wells are arranged on the collector route, or cast-iron or steel pipes are used.
For sanitary reasons, it is advisable to arrange outlets of the drainage network outside the boundaries of the city's development into treatment facilities (sumps, filtration fields).
Open rain network
stands from the street and intra-quarter. In the network, ditches and trays are distinguished that remove water from low areas of the territory, bypass trays that remove water from low areas of the territory, and ditches that divert water from large areas of the basin. Sometimes the open network is complemented by small riverbeds and canals.
The dimensions of the cross sections of individual elements of the network are determined by calculation. With small runoff areas, the cross-sectional dimensions of trays and cuvettes are not calculated, but are taken for design reasons, taking into account standard dimensions. In urban conditions, drainage elements are strengthened along the entire bottom or around the entire perimeter. The steepness of the slopes of ditches and channels (the ratio of the height of the slope to its inception) is set in the range from 1:0.25 to 1:0.5.
Trays and ditches are designed along the streets. The routes of drainage channels are laid, as close as possible to the relief, if possible outside the building boundaries.
The cross section of cuvettes and trays is designed rectangular, trapezoidal and parabolic, ditches - rectangular and trapezoidal. The greatest height of ditches and ditches is limited in urban areas. It is made no more than 1.2 m (1.0 m - the maximum depth of the flow, 0.2 m - the smallest excess of the edge of the cuvette or ditch above the flow).
The smallest slopes of carriageway trays, ditches and drainage ditches are accepted depending on the type of coating. These slopes provide the lowest non-silting speed of rainwater movement (at least 0.4 - 0.6 m/s).
In areas of the territory where the slopes of the relief are greater than those at which maximum current velocities occur, special structures, fast currents, and stepped drops are designed.
Design features of the rain network during reconstruction.
The position of the network in plan and profile is determined by the specific design conditions, as well as the height and planning solution of the territory.
If the existing collector cannot cope with the estimated costs, the drainage network will be reconstructed. The design solution in this case is chosen, taking into account the reduction in the catchment area and the estimated water flow, due to the laying of new collectors. Laying of additional pipelines is carried out at the same elevations as the existing network or at deeper elevations (if the existing network is not deep enough). Pipes of insufficient section are partially replaced by new ones with a large section.
In areas of the existing network that have a small foundation, they provide for strengthening the strength of the structure of the drain and its individual elements, and, if necessary, thermal protection. Continuation of the lecture on the topic: Engineering organization of the territory of populated areas.
Part 1: Vertical planning of urban areas.
Part 2:
The organized diversion of surface water is the most important requirement for the improvement of the site of an industrial enterprise. The accumulation of rain and melt water on the territory of the enterprise impedes the movement of vehicles, causes flooding of buildings, and this can lead to damage to equipment and destruction of building structures. In some cases, with an unfavorable terrain, flooding of the territory can have catastrophic consequences. Incomplete and insufficiently fast drainage of rainwater, even with light rains, leads to an increase in the level of groundwater, premature destruction of road surfaces and deterioration of the sanitary condition of the site. Along with rain and melt water, water flowing down the surface of road surfaces during watering and washing is also subject to rapid drainage.
The organization of surface water drainage is solved in the process of vertical planning of the site of an industrial enterprise and is one of its main tasks. At the same time, the vertical layout should provide the most favorable conditions for solving the issues of transport and technological communication between individual facilities of the enterprise. The vertical layout schemes chosen by a comprehensive solution of the problem of the system also determine to a large extent the solution of the issues of diverting surface water.
The vertical layout of the site, depending on the degree of coverage of the territory by work to change the natural relief, can be continuous, selective or zonal (mixed). A continuous system of vertical planning provides for the production of works on changing the relief throughout the site without any breaks. With a selective system, only areas directly occupied by buildings and other structures are planned, while in the rest of the territory the natural relief remains unchanged. With a zonal or mixed system of vertical planning, the territories of an industrial enterprise are divided into zones of continuous and selective planning.
For the sampling system, the removal of atmospheric waters from the planned sites should be organized and the rest of the territory should not be swamped.
Removal of surface water can be carried out by arranging open drains in the form of trays and ditches or an underground storm sewer pipeline system. In some cases, it is possible to jointly discharge atmospheric water with domestic and dirty industrial wastewater through common or semi-separate sewerage networks.
An open type of drainage system requires quite large areas for ditches and necessitates the installation of numerous artificial structures on the roads, making it difficult for transport links within the enterprise. Open drains do not meet high sanitary and hygienic requirements: water stagnation forms in them and the slopes are easily polluted. The only advantage of the open type of drainage system is its relatively lower cost. However, the operating costs of maintaining open gutters are usually higher than those containing storm sewer pipelines.
The use of an open method of drainage is possible with. some combination of favorable factors, such as:
selective vertical planning system; low building density;
a pronounced slope of the earth's surface of at least 0.005, the absence of depressions;
deep occurrence of groundwater; rocky soils, well-draining soils; undeveloped scheme of railway tracks and roads; a small amount of atmospheric "precipitation (average annual up to 300-400 mm, q ^<50);
lack of severe snowy winters.
Sometimes different sections of the territory of industrial enterprises have sharply different building densities, different saturation with communication routes, underground and aboveground communications. In such cases, a combined zonal drainage system can be used: rain sewerage is installed on one part of the territory, and a network of open drains is arranged on the other.
Recently, in connection with the increasing requirements for the improvement of sites of industrial enterprises, rain sewers * have become predominant.<720- В городах эта система часто предусматривается только на первую очередь строительства.
The main (advantages of a closed (underground) surface water drainage system are the following: the presence of only gratings of storm water inlets on the surface of the earth; good conditions for traffic and pedestrians - pollution washed off the surface is immediately isolated in underground pipelines; independence from the level of groundwater; favorable conditions for connection of internal drains; the possibility of diverting surface water in flat terrain and from low places; low cost of operation; no difficulties in operation "In the spring; no need for annual repairs; the possibility of using clean industrial effluents that do not require treatment.
The layout of building plots and other needs must be carried out taking into account the effective removal of precipitation using a drainage system, storm channels and drainage systems. If rain or melt water stagnates, this will contribute to the destruction of the coating and other negative consequences.
Why are surface waters dangerous?
Surface waters are formed from precipitation: snow, rain, hail, etc. This moisture can cause trouble on the site (construction, summer cottage), ranging from elementary stagnation of water with an unpleasant odor and ending with a violation of the integrity of the foundations near the underlying buildings. The troubles do not end there, also dampness can penetrate buildings and provoke the spread of fungus, an increase in humidity. There is also a danger for sidewalks and road surfaces: cracking, heavy icing, subsidence of the canvas. The root system of plants from excess rainfall can rot, the fertile layer will be washed out, and violation of the thermal regime will create conditions for the expansion of moss and mold.
In order to avoid all these negative phenomena, an excellent surface water drainage system is needed.
This system is of two types:
- point;
- linear.
Also, branches are divided into open and closed. The second option is more used to remove precipitation from entire city blocks. Point is the simplest, it is most often used with a small amount of falling moisture, which is collected in local modules (for example, water flowing from roofs). The linear system is more complex and consists of many elements: gutters, trays, ditches, wells, etc. Moisture is quickly collected from a large area and immediately sent to the central catchment collector.
materials
Concrete, plastic and earth embankments, ditches and trenches are used as materials as a temporary solution to the problem with precipitation. The elements of the surface water drainage system are installed at an angle, which contributes to the rapid collection and discharge of unnecessary moisture. If the site has high humidity through groundwater, then the drainage system is designed comprehensively, taking into account atmospheric phenomena and the influence of underground sources. Often, sand, dirt, debris can get into the drainage channels and trays with water, and therefore special traps are installed. 
These devices do not allow the system to become clogged and cease to perform its direct functions. When drawing up a general project for the removal of surface water, a number of factors must be taken into account: the amount of precipitation, the territory of the site, the presence of groundwater, the level of humidity, the slope.
The system of drainage of rain or melt water from buildings (drainage) is one of the most important for maintaining buildings of any purpose in good condition, extending their service life. The accumulation of water in a place not intended for this can easily lead to the destruction of the foundation and the adjacent territory, pollution of the facade coating, death of plants, and waterlogging of the area.
One of the options for protecting a building is its waterproofing, but it is not enough for full protection. Effective will be a joint barrier to moisture from the waterproofing and drainage system.
In some cases, a system that will divert water away from the house is mandatory. For example, in houses that are located in a lowland or on clay and loamy soils. The risk of destruction of the foundation of buildings is also high in areas with high levels of precipitation, high levels of groundwater. In addition to natural causes, there are also man-made threats - buildings with a deep foundation are prone to water accumulation near it, and concrete or asphalt paths prevent water from seeping into the soil.
A system is considered to be complete, which includes roofing, surface and drainage collection of precipitation.
The roof water collection system consists of gutters along the edge of the roof, vertical pipes located usually at the corners of buildings and outlet funnels. Gutter systems with a circular section are installed on multi-storey residential buildings or industrial buildings, as they have a greater throughput.
Pipes with a rectangular cross section are installed on small buildings. The material for the production of pipes is usually plastic or galvanized metal - durable, practical and lightweight. When installing a roofing system, it is important to firmly reinforce all elements to avoid noise during the passage of water.
The type of roof is also important - pitched or flat. If a pitched roof does not require additional devices, then for a flat roof, as well as open balconies and terraces, it may be necessary to equip an internal drain.
The surface system does not require a large amount of excavation: rain trays are laid out in shallow trenches, which are covered with protective gratings. The location of the water collection point, the size of the trays and the number of trenches are calculated by experts, taking into account the terrain and the average rainfall in the area.
Deep drainage is the most common option for arranging a rainwater management system. Requires a large amount of excavation - trenches should be about 80 cm deep. On a layer of crushed stone and a durable geosynthetic fabric, perforated pipes are laid in trenches. Please note that the use of a geosynthetic sheet is recommended for installation in clay or loamy soil. Laying in sandy soil does not need such a canvas.
This drainage system is especially important for buildings that have a basement, basement with a high level of groundwater. Although rainwater will be collected by this drainage system only during the rainy season (spring and autumn), its absence can cause serious damage to the foundation and the surrounding area.
In addition to the aforementioned drainage systems, there are several less common ones, for example, backfill drainage or formation drainage.
Reservoir drainage is used for apartment buildings, underground passages and industrial complexes. The backfill drainage system is used in small areas where it is difficult or impossible to install open drainage. Before arranging it, you should know that it will be impossible to carry out a subsequent inspection of earthen trenches, their maintenance, because after laying the geo-web, crushed stone and pipes in the trench, everything is covered with a layer of turf for a more attractive look.
Options for "taming" rainwater
Some types of drainage have options that can be selected depending on the amount of precipitation and installation methods.
The surface drainage system has linear and point views. The linear view implies the collection of rainwater from the entire local area. The system is formed by lines of trenches through which water flows into the reservoir.
The point system is busy collecting water at certain points on the site, most often these are the outlet funnels of drains or watering taps. Collection points are closed with gratings to prevent branches, leaves and other debris from entering the drainage system. The drainage pipes of the point system are connected to the main pipe that leads to the well.
There is also a combination of point and line view which is considered to be the most advantageous in terms of cost and operation.
According to the method of installation, drainage systems are divided into open and closed.
Open systems are a combination of shallow sloping trenches connected by a common drainage ditch. Plastic or concrete trays covered with gratings are laid in the trenches. This type of drainage is preferred for low cost and speed of installation.
The arrangement of water disposal is best carried out during the construction of the building; installation after the completion of construction work is fraught with certain difficulties. In the period between the installation of a full-fledged system, it is possible to organize a temporary drainage system - to collect water manually, using barrels: a container of a suitable volume is installed under the downpipe.
A closed system has a narrower and shallower trench, which means less throughput. "Pros" are considered a more aesthetic appearance and safety of operation.
Vertical drainage can be called a variant of the deep drainage system. Near the buildings, the required number of wells with submersible pumps is installed. This option of drainage is the most efficient, but also the most expensive, since it requires a large amount of excavation and special knowledge.
Also, the closed installation of the drainage system can be divided into solid and wall-mounted. As the name implies, a solid one is mounted on the territory of the entire site, while protecting the basement and the adjacent territory.
The wall system is located exclusively near the foundation of the building, protecting only the building from rainwater.
Preparing for the installation of a system for removing excess water from the house
Prior to the start of work on the arrangement of the drainage system, it is necessary to prepare information on the relief of the given territory, soil composition, and average rainfall. These data can be taken from specialized services. Vibration loads in the territory where the pipes will be laid must be known to the customer himself, a master from a specialized construction company will help to determine them correctly.
Place of discharge of rainwater
An equally important element of the system is the rainwater collection point. They can serve as a natural reservoir, a specially prepared drainage field, consisting of a number of recesses through which water seeps into the soil, sewer collectors. The main condition for the arrangement of the discharge site is its location at the lowest point of the site. On a territory with a flat relief, a drainage well with a pump is installed.
The well can also be accumulating: water is then used for irrigation and absorbing: in the absence of a bottom, water slowly seeps into the ground.
In no case should you equip a place for collecting water near the foundation of the house, and you should not use underground drainage with surface drainage. This may lead to flooding of the building.
It is possible to choose the optimal type of drainage system only after a detailed study of the characteristics of the territory, weather reports for the area, the method of using the adjacent territory, and the purpose of the building itself. An experienced specialist will be able to take into account and correctly use all the information, so this complex and responsible work should be entrusted to a construction company with extensive experience in installing drainage of various kinds.
Errors or even inaccuracies in the work carried out on the drainage of rainwater can lead to irreparable consequences. On the contrary, compliance with the requirements and rules will extend the life of the building by more than half a century, eliminating unnecessary expenses and hassle.
Even at the stage of drawing up the project and in the process of erecting any structure, a water drainage system is necessarily laid. Properly installed, it will reliably protect the foundation of a house or office and the territory of the site from the negative effects of precipitation. Internal, road, drain and surface drainage must be combined into a single system, the only way they are guaranteed to cope with the task. It's not worth saving on them.
Video guide for installation of surface drainage systems
Purpose of the water drainage system
The main task of the drainage system is to protect the foundation of the building from storm water, as well as all types of coverage on the site and the surrounding area. The presence of a well-designed and assembled drainage system several times increases the life of the building and reduces repair costs. Under the influence of constant precipitation, asphalt and concrete fall apart and crumble in a year and a half. But if a linear drainage system is provided on the territory, then it will be necessary to think about a new coating no earlier than in 6-8 years.
When drawing up a drainage scheme, it is necessary to think through all the details, take into account the features of the soil and relief, the presence of groundwater, the number of storeys of the building, the traffic intensity and, of course, the possibility of connecting to a public storm sewer system.
The importance of drainage in the garden can not be overestimated
Regardless of whether a commercial development is planned or an individual residential building is being designed, first of all, you need to pay attention not to the cost of the drainage system, but to the expected load.
What should be the drainage system on the site
Firstly, the drainage of water on the site must be an integrated system. Its main components are:
- roof drainage system;
- surface water drainage system;
- internal drainage;
- groundwater drainage system.
The latter is mandatory in those areas where the groundwater level is high enough, or there is a high probability of seasonal flooding. It is especially necessary if the house has a basement or underground garage.
Drainage from the roof, like surface drainage, is designed to combat the negative effects of rain and snow. In addition, it prevents the occurrence of perched water, which, as a rule, is a seasonal phenomenon. For houses with basements, water supply becomes an urgent problem: a leaky septic tank (“cesspool”) fills up in a matter of days in spring and during the rainy season.
Roof drainage allows you to direct the flow of water from the roof to the right place
The roof drainage system is designed to collect all rainwater from the roof of the building and bring it to the water collection points. If during construction the drainage from the roof became the point at which they saved money, then broken paths, crumbling steps and a dirty foundation will not take long.
surface drainage
The next mandatory element of the overall system should be surface drainage. Removal of excess moisture from the site in this way is carried out by installing a system of point storm water inlets and trays. It is not only effective, but also aesthetically fits perfectly into the general appearance of the building and the surrounding area. The material benefit from the operation of surface drainage is already felt in the first few years. The greatest effect is achieved by combining surface drainage with underground drainage.
To organize a system for draining water from the surface, the following can be used:
- plastic trays (drainage channels)
Plastic trays are mainly used in private buildings
They are made from super durable material.
- concrete trays
They are used where the coating has a large load (roads, garages, entrance gates). The depth varies depending on the expected volume of water, the docking system guarantees a secure fit and protects against shifting. From above, the products are protected by gratings made of steel or cast iron.
Concrete trays compared to plastic trays have greater strength and relatively low cost.
- polymer composite trays
The material from which they are made is a carefully selected mixture of filler (granite or quartz chips, sand) and a binder mass, usually polyester or epoxy resin.
Polymer composite trays are the most promising substitute for plastic and concrete analogues
The main function of surface drainage is to protect the foundation of buildings, basements and basements from moisture. In addition, it prevents soil erosion, prevents waterlogging. The appearance of ice in the winter and puddles in the warm season can also be prevented with its help. Road drainage helps prevent subsidence of the soil and subsequent failures on roads, paths, sidewalks. With it, you can save the landscape of the territory unchanged, since it is a reliable protection of the soil from leaching. Participating in the general improvement and the creation of a single style, drainage also affects the development of plants. It allows the root system to develop harmoniously, protecting it from excess moisture.
Linear drainage
Speaking about the surface drainage system, it is necessary to separately mention its types and, first of all, linear drainage, as able to cope with the heaviest loads. To organize it, the trays are laid flush with the surface, while the obligatory slope should be five millimeters per meter of length. This is achieved either by laying at an angle, or by purchasing trays in which the tilt system is already laid. The drainage channel is directed, as a rule, to the storm sewer well. From above, each tray must be closed with a decorative grille.
Linear drainage systems are most often used on the site.
To protect the sewer from clogging, sand traps are installed in them, which also trap small debris.
Point drainage
Point drainage has also firmly occupied its niche. It is a system of storm water inlets and underground pipes with access to the sewer.
Conventional storm water inlets are installed where heavy loads are expected. From above, they are closed with plastic or metal decorative grilles.
Rain inlets are installed in places of the main water flows
Rain collectors with lateral water outlet perform the function of purifying rainwater from impurities. This is important in cases where water is collected for economic and domestic needs.
A two-section drain drain allows you to monitor its condition and clean it in a timely manner.
A storm water outlet is used to collect precipitation from the roof of buildings. They are connected vertically to the drains. Their design includes a stale air trap, which prevents the spread of unpleasant odors.
Cast iron storm water inlets are used to divert water from the roadway. These are sewer manholes that are installed in places of organized slopes and closed with bars on top. Water entering this system flows directly into the sewer.
Depending on the purpose, the drain drain is mounted in the lowest places, under the drainpipes and watering units, in a word, where the use of a linear one is not necessary or not possible.
Various types of point drainage systems
Volumetric drainage
As a separate type, volumetric drainage can be distinguished, which is a kind of “layer cake” made of geotextiles, lawn or geogrids, gravel, sand and soil. By maintaining the natural friability of the soil due to the reinforced grating, it is possible to ensure ideal water drainage from landscape gardening areas, open areas and lawns.
Internal drainage
Internal drainage is used not only in food or pharmaceutical industries. In everyday life, the most striking example of its use is a bath. The internal water drainage system consists of trays and ladders made of stainless steel. It is designed to collect and discharge wastewater into the general sewer network.
Groundwater drainage system
The groundwater drainage system is an engineering structure designed to collect and drain infiltrated and groundwater. This is a branched structure of pipes (drains) and wells located around the entire perimeter and interconnected.
If the drains are laid underground, then a deep drainage system is formed. It allows you to withdraw water from the site and lower the level of groundwater. Such systems are used in swampy and excessively humid areas, as well as in the construction of basement floors.
When performing foundation drainage, preference should be given to polypropylene, polyethylene and PVC pipes.
Even before the construction of the building, you need to answer a few questions:
- What is the groundwater level in the construction site? What is the structure of the soil? This determines, in fact, the very need for a deep drainage system when designing basements. For this information, it is best to contact geodesy specialists.
- Where will ground and surface water be discharged? Water can be discharged into storm or mixed sewers, as well as into a drainage field, from which water subsequently evenly goes into the ground in a specially designated area.
- Do I need a drainage pump and a well, or will the water go by gravity? Be sure to determine the slopes on the site, and assign a reset point in the lowest part.
- What is the size of the area from which water will be drained? Depending on this, a drainage system with an appropriate throughput is selected.
- What surface pressure must the drainage systems withstand? That is, whether cars will pass through the linear drainage system, people will walk, or no one will step on it. For deep drainage, you also need to determine the load.
Drainage and water collection systems, with the right choice of materials, proper installation and timely maintenance, work and protect buildings and the site for many years. Doing the drainage yourself is a very real task. However, if you have doubts about your own abilities, it is better to invite professionals in this field. After all, the safety of basements and foundations is the key to the safety of the whole house, and hence its residents.
