Properly designed pavement prevents soil erosion at the base of walls and protects the foundation from seasonal soil swelling. The absence of this element often leads to skewed gates, cracks in the walls and flooding of the observation pit with groundwater. That is why the creation of a waterproof barrier along the perimeter of the building is a mandatory stage of capital construction or reconstruction.
The main task of the design is to divert precipitation at a distance of at least 60-80 cm from the walls of the building. If you ignore this parameter, moisture will accumulate in the immediate vicinity of the foundationThis reduces its load-bearing capacity critically. Properly executed work guarantees dryness inside the room and durability of the entire garage structure.
The process of creating a protective circuit requires compliance with the technology of preparation of the base, laying waterproofing and forming the finishing coating. Errors at the stage of tamping the pillow or violation of the angle of inclination of the surface will negate all efforts. Next, we will analyze a step-by-step algorithm of actions that will make reliable protection on their own.
Selection of materials and calculation of design parameters
Before starting work, it is necessary to determine the type of coating and the width of the protective strip. For garages where heavy machinery or tools are often stored, the best solution is considered to be the best solution. concrete-padIt is a very strong one. The width of the structure depends on the type of soil: on sandy soils enough 70 cm, while clay bases require expansion to 100-120 cm.
The most important parameter is the angle of inclination of the surface, which ensures the flow of water. Standard norms prescribe a slope of 3 to 5 degrees, which is approximately 3-5 cm for each linear meter of width. Too steep a slope will make it difficult to move around the garage, and insufficient will lead to stagnant puddles and the destruction of the coating in winter.
When choosing a width, take into account the length of the roof overhang: the edge of the window should stand for the projection of the cornice by at least 20 cm so that the drops do not blur the ground outside the protection.
To create a qualitative basis, a set of materials will be required, each of which performs its function. Sand serves for alignment, rubble creates a drainage layer, and clay or geotextile provides waterproofing.
- 🏗️ Crushing medium fraction (20-40 mm) to create a carrier layer.
- 🏗️ Sand river or quarry to form a flat substrate.
- 🏗️ Cement M400 or M500 for the preparation of a durable solution.
- 🏗️ Reinforced netting or bars with a diameter of 6-8 mm to strengthen the structure.
Use of the geotextiles between layers of the pie significantly extends the service life of the structure, preventing mixing of sand and rubble with the soil. This is especially true for regions with high groundwater levels.
Base preparation and excavation
The process begins with the marking of the territory and the removal of the upper fertile layer of soil. It is necessary to dig a trench around the perimeter of the garage with a depth of about 30-40 cm. The bottom of the trench should be carefully cleaned of plant roots and debris, as any organic matter will eventually rot and form voids.
⚠️ Warning: When digging the trench, try not to damage the waterproofing of the garage foundation. If it was broken, before filling the pillow be sure to restore the asphalt coating of the walls.
After the excavation, the bottom of the trench should be treated with herbicides or spilled with boiling water to destroy the seeds of weeds. Vegetation can grow through concrete, causing it to crack. Then the walls of the trench should be strengthened with boards or slates if the soil crumbles.
The next stage is the creation of a compensation seam between the foundation and the future pavement. To do this, a layer of tarted wood, ruberoid or damper tape with a thickness of 1-2 cm is laid along the wall of the garage. This gap is necessary so that during the thermal expansion, concrete does not press on the walls of the building.
Technology of laying layers of cake pavement
Forming a multilayered structure, or “pie,” requires consistent adherence to technology. First, a layer of clay (if clay lock is required) or geotextiles is laid at the bottom of the trench. Then the sand is poured with a layer of 10-15 cm, which is carefully shed with water and trampled to a monolithic state.
On top of the sand pillow, crushed stone is filled with a layer of 5-10 cm. This layer is also subject to tampering. The crushed stone creates a rigid base that distributes the load and prevents deformation of the upper coating during frosty swelling of the soil.
To strengthen the structure on top of the rubble is laid rebar. Tubs should be in the thickness of concrete, so the net is raised 2-3 cm above the rubble with the help of special fixers or stones. This will prevent the occurrence of cracks during operation.
☑️ Control of the preparation of the basis
If you plan insulation, which is important for heated garages, between the layers of sand and concrete lay slabs. polystyrene. They do not absorb moisture and effectively retain heat, preventing freezing of the soil under the foundation.
Concrete and deformation seams
The main stage is pouring concrete solution. For self-preparation of the mixture, the proportion is used: 1 part cement, 3 parts sand and 4-5 parts crushed stone. The consistency should be thick, but plastic, so that the solution fills the voids well.
To prevent concrete from cracking when the temperature changes, it is necessary to organize deformation seams. To do this, cross-windows every 2 meters install wooden slats treated with bitumen. They serve as beacons when aligned and remain in the design as expansion compensators.
| Parameter | Meaning | Appointment |
|---|---|---|
| The width of the ribbon | 70-120 cm | Protecting the foundation from moisture |
| Slope of the surface | 3-5 degrees. | Water runoff from walls |
| Concrete thickness | 7-10 cm | Strength of coating |
| Step stitches | 2 meters | Compensation for expansion |
It is better to make the pouring in one step to avoid the formation of cold seams that reduce strength. After the concrete is laid, it is necessary iron - sprinkle with dry cement and iron out with a master to increase the moisture resistance of the surface.
Iron nuances
The procedure is carried out 2-3 hours after pouring, while the concrete is still wet. Dry cement rubbed in circular movements, creating a strong crust that does not dust and repels water.
Laying of pavement tiles as an alternative
If the pouring of monolith seems too time consuming, you can make a screen from pavement. The technology of preparation of the base remains the same, but instead of concrete solution, the upper layer is filled with a dry cement-sand mixture with a thickness of 3-4 cm.
The tile is laid on this mixture and knocked with a rubber kian. The advantage of this method in repairability: if the site is damaged, you can replace several elements without disassembling the entire structure. In addition, the rough surface of the tiles is less slippery in winter.
It is important to ensure that the seams between the tiles are tightly filled with sand or special grout. This will prevent water from leaking into the lower layers and leaching the base. The edge of such a window is better to wrap with a curb stone.
⚠️ Attention: When laying tiles on clay soils, be sure to use geotextiles, otherwise the sand from the seams will quickly go into the ground, and the coating will subside.
For garages where heavy equipment comes in, choose vibropressed tiles with a thickness of at least 60 mm. A lesser thick water-pressed tile can split under the weight of the car.
Coverage care and typical mistakes
Once the work is completed, concrete requires proper maintenance to gain strength. In hot weather, it should be regularly moistened and covered with a plastic film to prevent moisture evaporation too quickly. The full strength of the concrete is gained after 28 days.
A common mistake is saving on the width of the window. A narrow band of 40-50 cm is inefficient, as water from the roof will fall outside, blurring the ground at the foundation. Also critical is the lack of slope, which turns the pavement into a pool near the walls.
The main rule of durability: quality of each layer and strictly sustained slope is more important than the brand of used cement.
Check the condition of the compensation seam at the wall regularly. If it is clogged with dirt or collapsed, it must be cleaned and filled with a new sealant. This will keep the contour moving relative to the building and prevent cracks from appearing.
Do I need to build a garage around a small garage?
Reinforcement is desirable for any concrete structures, as it works on stretching. For a garage weighing up to 3 tons, it is enough to use a grid of a 4-6 mm rod with a 100x100 mm cell. This will prevent the concrete from breaking when the ground moves.
Can I do a scaffolding in the winter?
It's not recommended. Concrete work is possible only at positive temperatures (above +5 ° C). In winter, you can only prepare a trench, but laying the finish layer is better to postpone until spring.
Which material is better: asphalt or concrete?
For a private garage, concrete is preferable. Asphalt when heated emits harmful substances and has a specific smell, and also requires special equipment for high-quality laying. Concrete is more environmentally friendly and affordable for self-assembly.
How to fix the cracks on the old pavement?
Small cracks are embroidered and filled with bitumen mastic or sealant. Major damage requires cutting down the damaged area and concrete re-casting with mandatory ligation of the reinforcement.