1. Clean up the rubbish on the laying site and level it. The outdoor garage roof and roof garden need to have 2-5‰ slope leveling.

2. Roof greening and outdoor plastic drainage board Garage roof greening can be equipped with porous seepage pipes, so that the water discharged from the drainage board can be concentrated and discharged to nearby sewer pipes or nearby urban sewers.

3. The ground of the basement is anti-seepage. Before the floor is built, a layer of drainage board is made. The round platform is downward, and there are blind ditch around it, so that the groundwater will not come up, and the seepage water will naturally flow into the surrounding blind ditch through the space of the drainage board. Then flow into the sump through the blind ditch.

4. The basement wall is anti-seepage, and the drainage board is laid on the main wall of the building. The space of the seepage board outside flows straight down into the plastic drainage board of the blind ditch until the sump.

5. When laying plastic drainage boards in any section, care must be taken not to let dirt, cement, yellow sand and other garbage enter the front space of the drainage boards to ensure that the space of the drainage boards is unimpeded.

6. When the drainage board is laid, the protection measures shall be taken as far as possible. When the drainage board is laid on the surface or outdoor garage, the geotechnical plastic drainage board shall be backfilled as soon as possible to prevent the laying quality from being affected by the strong wind. The basement and inner walls shall be waterproofed as soon as possible. Make a protective layer to prevent the drainage board from being damaged by people or objects.

7. The backfill soil is cohesive soil. It is ideal to spread 3-5 cm of yellow sand on the geotextile, which is beneficial to the drainage of the geotextile.

8. When the drainage board is laid, the next 1-2 fulcrums can be overlapped side by side, or the two bottom boards can be aligned, and the top can be lapped with geotextiles. As long as no soil enters the drainage channel of the drainage board, it is enough to keep the drainage smooth.