The living room floor was punched a hole by the developer to transport materials

Although concrete also has the effect of water insulation, it is not a waterproof material in the strict sense, and it will leak without making holes when water accumulates. If you want to waterproof, you have to lay waterproof material on concrete. If the concrete is poured well after the hole, the water insulation effect is similar to that when the hole is not made.

If you don't make up it well, if you don't do it in the right way or if you don't take it seriously, you will almost certainly miss it.

The better method of filling the hole is generally: 1. Clean the loose concrete around the hole; 2. Sweep away the scum and ash around the hole; 3. Rinse the concrete surface around the hole with water, and support the formwork; 4. First pave 1:2 cement mortar 30 50 mm wide along the concrete around the hole; 5. Immediately after laying mortar, pour fine stone concrete with a strength grade higher than the original concrete, and vibrate carefully when pouring, neither under-seismic nor over-seized; 6. After watering, it is necessary to carefully spray water for 7 days, and the strength should not be shaken before reaching 70.

If the original has been mended and the repair is not ideal, you can remove 50 width and 40 50 mm groove between the new and old concrete around the hole, clean, sweep, rinse, thoroughly dry and fill the waterproof cement or other waterproof materials, and smooth the surface with mortar. Generally speaking, it can achieve the water insulation effect when the original hole is not drilled.