Wu Guozhu

Functional principles of special water storage and drainage boards for roof greening
Special water storage and drainage boards for roof greening have been used in developed countries for decades and have been developed in China for nearly ten years. They are the first example of green roofs and their main principles. It is to isolate the planting layer from the roof and play the following functions
Smooth drainage
Drainage is the most important function of roof greening. If water can be drained away in time, the roof will not leak. The roof greening storage and drainage board, with the plane facing upward, separates the roof from the roof, allowing rainwater to filter through the geotextile to the overhead layer, and drainage is unobstructed. It avoids the problem of the previous roll-shaped drainage board having the raised points pointing upward, causing all the soil to fall into the gaps between the raised points and preventing drainage.
Thermal insulation
Through the overhead function of the special water storage and drainage board, the hot air is cut off so that the temperature cannot be transmitted to the roof, thereby reducing the indoor temperature.
Water storage
The soil layer of roof greening is generally thin, the temperature is high, and the water evaporates quickly. Therefore, the unique water storage tank design ensures that excess water is stored in the groove, which does not increase the roof load, but also Can be absorbed by plants.
Root control
Roots cannot grow in natural air without soil medium. For example, if there are holes on the side of a flower pot, the roots will not grow outside. When the plant roots grow to the overhead air layer formed by the water storage and drainage board, because there is no soil in the overhead layer, the air in the overhead layer inhibits the root system, preventing the roots from growing downward, and will separate more fine particles laterally in the soil layer. The principle of root air control. It not only controls the root damage to the roof and waterproof layer, but also promotes the development of plant capillary roots and stronger vitality.
High pressure resistance
The special water storage and drainage board adopts the general engineering plastic injection molding process, which will never break and age. It is more stable after being covered with soil and has super pressure resistance. There is no need to worry about being stepped on and crushed during construction.
Breathable
The overhead air layer under the green roof drainage board makes the soil more breathable and is conducive to plant growth.
Drainage board plastic boss plastic boss waterproof board sandwich board raw material is high-impact polystyrene high-density polyethylene, which is a difficult-to-decompose engineering plastic. It is placed in the building mezzanine. The decomposition period is greater than 1 year and is used for the roof of underground projects. Or high compressive strength and light load in roof greening. Compared with the conventional process, the drainage board and geotextile are combined to have multiple functions such as drainage, waterproofing, breathability, moisturizing, and root separation. It is used in insulated flat roofs or underground engineering floors. The multiple fulcrums of the drainage board make the building surface and There are gaps between the structural layers, which have functions such as moisture isolation, drainage and insulation. There are large and small pivots on the edges of the product, which can overlap each other along the slope. Even if there is a lot of water leakage, it can be drained out promptly and quickly. Construction and transportation are very simple and convenient.
Compared with the conventional process, the drainage board and geotextile are combined to have multiple functions such as drainage, waterproofing, breathability, moisturizing, and root separation. It is used in insulated flat roofs or underground engineering floors. The multiple fulcrums of the drainage board make There is a gap between the building surface layer and the structural layer, which has functions such as moisture isolation, drainage and insulation. There are large and small fulcrums on the edges of the product, which can overlap each other along the slope. Even if there is a lot of water leakage, it can be drained out promptly and quickly. Construction and transportation are very convenient. easy and convenient.
In the early years when material technology was underdeveloped, the artificial intervention system used river pebbles to construct a permeable drainage layer and a graded sand and gravel filter layer to construct a soil and water conservation layer.
The development of modern synthetic material technology provides a more convenient way to create artificial environmental circulation systems in the shape of shallow basins. The water storage and drainage boards are heated and pressed by plastic raw materials to build the water storage and drainage layer. Polyester non-woven fabrics filter water and soil conservation. The artificial intervention system is more flexible and lightweight, and the system structure is designed from top to bottom as follows
Artificially prepared planting soil layer, natural filling
The natural soil base layer is compacted according to the backfill requirements
The irrigation system is in the soil base layer Pre-buried
Polyester non-woven fabric soil and water conservation filter layer
Storage and drainage layer
Fine stone concrete waterproof protective layer
Waterproof layer according to design
Leveling and slope layer
Garage roof reinforced concrete structure
The use of our water storage and drainage slabs greatly reduces the cumbersome process, reduces the cost of materials and construction, and reduces the time cost of construction.
Drainage boards are divided into two series: coiled material and sheet material. The coiled material is divided into three types: hot melt, lap joint and self-adhesive. In terms of shape, a special process is used to press the plastic sheet into a closed and raised columnar shell. It forms a concave and convex membrane with a continuous shell, a three-dimensional space and a certain support height. Butyl rubber strips are hot-glued on the edges during processing and production. The top of the shell is covered with a geotextile filter layer, which is used for water seepage, hydrophobic drainage and water storage. Also known as self-adhesive drainage board, drainage board, drainage protection board, filter board, plastic concave and convex drainage board, plastic sandwich board.
Traditional garage flooring practices and imperfections in pebbled clay drainage
Increased building loads.
The construction is difficult, complex, poor in safety and high in cost.
An additional root-blocking layer is required, which is low in cost performance.
It cannot effectively protect the waterproof layer and is prone to leakage.
Drainage efficiency is poor, making it difficult for plants to survive.
Advantages of drainage protection boards on garage roofs and planted roofs in waterproofing and drainage protection
Efficient drainage to avoid water accumulation.
High strength resistance to root puncture, long-lasting protection of waterproof layer and base structure.
Significantly reduce building load.
Impact-resistant, preventing planting soil from impacting and damaging the waterproof layer.
Construction is convenient and fast, and the quality is stable and guaranteed.
Auxiliary waterproofing function
After the drainage membrane is laid, it adopts the adhesive hot-sealing method to form a new waterproof layer, which has both drainage and secondary waterproofing functions
Root isolation function
General waterproofing membranes do not have the function of root isolation, but membranes have strong root isolation due to their high density. The thickness of the membrane can be adjusted according to the root isolation requirements to achieve the root isolation effect.
It can be both bonded and ironed
Due to the unique structure of the material, the use of special glue can effectively destroy the surface structure of the material so that the two layers of film can be effectively fused together to function as a waterproof root barrier. It can also be mechanically bonded.
High strength
The material coil has high compressive strength.
Anti-collapse design
All drainage membranes adopt an anti-collapse design. Due to the middle supporting top column structure, the geotextile will not sink after being covered with soil, ensuring sufficient drainage space.