How to calculate basement waterproofing

The basement waterproof layer is calculated according to the actual paving area, but the hole area within 0.3m2 is not deducted. The waterproof layer at the junction of plane and facade is counted as plane waterproof if the rolled-up height is not more than 500mm; When the rolling height exceeds 500mm, it shall be calculated as the waterproof layer of the facade.

General basement waterproof construction method:

1. Construction procedure: leveling layer acceptance → base cleaning → preparation of cement binder → additional layer → base construction → protective layer → maintenance.

2. Before bonding, pre-pave and align the basement waterproofing membrane, then roll up both ends of the basement waterproofing membrane in half, pour the prepared cement glue into the base, scrape it flat with a scraper, then push the basement waterproofing membrane forward, remove the air remaining in the basement waterproofing membrane with a scraper in time, and scrape out the excess glue. The bonding rate between basement waterproofing membrane and leveling layer is 85% or higher.

3. Joint exercises:

(1) Construction of waterproof joint in basement: the moistureproof layer, waterproof layer and additional layer are all overlapped and bonded with cement glue, with a width of 10cm. Additional seam and waterproof seam staggered more than 5cm.

⑵ Waterproof joint construction in basement: 10- 15 cm lap joint, and the cover strip is bonded with polymer caulking glue.

4. Protective layer

After the coil is laid, a 2cm thick 1: 2.5 cement mortar protective layer shall be applied on the waterproof layer, and plastering shall be done twice. The second layer of summer-planting must be staggered more than 20cm, and the protective layer should be leveled and watered for maintenance.