Planting HDPE block drainage board on roof in Shenzhen

  The water storage and drainage board is made of HDPE injection molding
It is a new geotechnical material integrating the functions of drainage and water storage
It can withstand the high compressive load of more than 400kPa
At the same time, it has many functions, such as water storage, drainage, air permeability, moisture retention, heat insulation, preventing plant roots from damaging the concrete structure and so on
Combined with geotextile, it can avoid fine particles blocking the water storage tank and drainage channel, and maintain smooth drainage and air circulation
It is widely used in landscaping projects
Product features: the traditional drainage method uses bricks and tiles as the filter guide layer, and uses more pebbles or gravel as the filter layer to discharge the water to the place
Now, replacing pebble filter layer with drainage board to drain water saves time, labor, energy, investment and reduces the load of buildings

Scope of application: roof greening, city square, golf course, playground, public building greening and road greening in the park

1
Clean up the garbage and cement leveling on the laying site to ensure that there is no obvious concave convex on the site
2-5&permil is required for the roof of outdoor garage and roof garden; Slope making

2
Roof greening and underground garage roof greening can be equipped with porous seepage pipe, so that the water discharged from the drainage board can be centrally discharged to the nearby sewer or the nearby urban sewer

3
The basement ground is impermeable, and the floor is overhead on the foundation, that is, a layer of drainage plate is made before the floor is made, the circular protrusion is downward, and a blind ditch is left around, so that the groundwater can not come up
The seepage naturally flows into the surrounding blind ditch through the space of the drainage plate, and then into the sump through the blind ditch

4
The basement wall is anti-seepage
The drainage board can be laid on the main wall of the building
The round raised platform faces the main wall
A single wall is built outside the drainage board or steel mesh powder cement is used to protect the drainage board, so that the space of the water seepage board outside the wall directly flows into the blind ditch and leads to the sump

5
When laying the drainage board in any section, be careful not to let the garbage such as soil, cement and yellow sand enter the front space of the drainage board, and the space of the storage and drainage board is unblocked

6
When the drainage board is laid, protective measures shall be taken as far as possible
When the drainage board is laid on the layer or outdoor garage, backfill shall be done as soon as possible to prevent the drainage board from being disordered by strong wind and affecting the laying quality; The basement and interior wall waterproof shall be protected as soon as possible to prevent the drainage board from being damaged by people or objects

7
The backfill is cohesive soil
It is ideal to lay 3-5cm yellow sand on the geotextile, which is conducive to the water filtration of the geotextile; If the backfill is a kind of nutrient soil or light soil, there is no need to lay another layer of yellow sand
This soil itself is very loose and easy to filter water

8
During the laying of the drainage board, the side shall be overlapped for 5-10cm, and the top shall be overlapped with geotextile
As long as no soil enters the drainage channel of the drainage board, the drainage can be kept smooth