Do you also need to do waterproofing before backfilling the bathroom?

It needs to be waterproofed. First of all, let's talk about the two functions of waterproofing before backfilling: 1. The waterproof layer above is not done well, and the water will leak to your backfill layer at most, and will not leak to the owners downstairs, causing too much loss.

2. The pipeline of the backfill pit is broken, and the leakage is more serious, which can avoid the loss of a large area caused by the leakage of the downstairs owner. Do waterproofing.

1. The bathroom should first plan the installation of the equipment, and use fine sand cement to do a good job of the slope of the water according to the location of the floor drain of the equipment. 2. After planning, use waterproof paint or waterproof slurry and waterproof cloth to glue or coat the wall more than 30 cm.

The vicinity of the sewer pipe should also be maintained at a certain construction height of waterproofing. 3. Water experiment, fill the toilet to keep the threshold height of water after plugging the drip and other sewer spaces in the entire bathroom, and wait for 1 to 2 days. 4. Observe that the horizontal plane does not fall, or go downstairs to check that there is no trace of water leakage to construct floor tiles and supporting facilities, and at the same time ensure that the waterproof strengthening of various pipe interfaces is strengthened and sealed with cement slurry.

It is better to do double waterproofing and double protection.

The backfill should be solid, and the concrete cushion above should be thick enough, and the label should not be low to prevent sinking.

1. You should stop using water first, and then clean up the oil and stagnant water on the bathroom floor to ensure that the bathroom floor can be kept clean and dry. If there are beautiful joints on the bathroom floor tiles, you should use a utility knife to carve a small groove in the gap between the floor tiles.

2. Next, a layer of penetrating waterproofing agent should be applied to the surface of the bathroom floor tiles, the surface of the wall tiles, the gaps of the tiles and other places where there is cement, and in the process of painting, it must be ensured that the coating is uniform. When the penetrating waterproofing agent is about 90% dry, that is, about two hours, the gap of the tile is filled with caulk, especially the perimeter of the pipe, which needs to be reinforced.

Hope it can help you, thank you.