When planting drainage boards on the roof, should the bumps go up or down? Seek the best.

If the planting roof is a water storage and drainage board, the fulcrum is downward, and if it is a PVC drainage board, the fulcrum is upward. PVC drainage board is the most cost-effective, but also stab-proof, and the roof is easy to grow.

Construction method of planting roof drainage board;

1. Laying drainage boards along the slope along the retaining wall of the garage roof, with overlapping edge fulcrums 1-2 fulcrums; Or glue instead of lap joint, so that the drainage plate forms a whole, which not only drains water, but also plays the role of root separation, or is an auxiliary waterproof layer, and its shape can be cut at will according to the field situation.

2. After the geotextile is laid, it is spread all over the drainage boards, and the edges overlap each other by 5- 10 cm. Local water is adhered and fixed, forming an integral hollow layer with the drainage plate, which can not only ensure smooth drainage, but also prevent soil from flowing into it.

3. The geotextile will turn up when closed, at least 10cm higher than the water outlet (used for retaining soil and filtering water), and the top will be fixed with adhesive or steel nails.