1. Base requirements:
The base surface is cleaned up, the water content is not more than 9%, the level is compact, and the nodes are neat and complete, meeting the requirements.

2. the first waterproof layer:
(1) Laying a flexible waterproof layer, and selecting a coating or a coil can be used. The construction conditions require that the moisture content of the base surface is not more than 9%, so it is suitable for summer construction after the weather is hot and clear for 5 days. After the completion of the work, a water storage experiment should be done.

(2) If the paint is waterproof, take “one cloth and two coats” as an example: after cleaning the base layer, brush the paint once, dry it into a film, and lay a layer of fiberglass cloth carcass reinforcement material, which has been flattened. The surface is covered with a layer of paint and fixed, and after drying, the next coating is applied. The total thickness of the waterproof coating should be more than 3 mm.

(3) If the waterproof coil material is used for construction, after cleaning the base layer, the adhesive is glued on the reverse side of the coil and the base layer, and the base line is adhered and rolled by far and near, and finally the joint is inspected and processed. 

3. The second waterproof layer:
Laying a rigid waterproof layer should be carried out about two days after the completion of the first flexible waterproof layer. The main material is high-grade fatty acid mortar waterproofing agent, cement, sand, fine stone aggregate and fiber. The thickness of the waterproof layer should be 20-30 mm.

(1) Install the grids according to the specifications, and set the grid to 4000 mm × 4000 mm. Then sprinkle water to moisten the base surface, but there must be no water.

(2) According to the order from far to near, first high and then low, the prepared mortar or fine stone concrete shall be constructed one by one, and the same division shall be completed once, and the compaction shall be smoothed.

(3) After initial setting, remove the dividing wood strips, calendar and trim the dividing seams.

(4) Insert a split joint with a flexible sealing material to treat the surface. Pay attention to watering and maintenance after the construction is completed.

(5) If there is roofing planting soil, cover the planting soil in the shortest possible time.