Can the renovation of the old house and the new bathroom drain without penetrating the floor slab?

This kind of renovation has destroyed the floor structure, there are potential safety hazards, and you are not approved of doing this.

No, because the downstairs don't agree.

In this case, it can be designed to be drained on the same floor, if the drainage point is far away from the main sewage pipe and cannot be drained by gravity, the pressure drainage can be carried out with Zede sewage lifter.

First of all, the original old house floor (floor tile or cement calendered floor) and waterproof layer are cleaned up, and the screed layer is repaired and slope inspected (the slope of the surrounding surface layer is drained, and the slope is about 2%). Then follow the toilet waterproofing specifications. Toilet waterproofing specifications.

1. Waterproof construction should be used for coating film waterproof materials.

2. The performance of waterproof materials should meet the provisions of the current national standards, and there should be a product qualification certificate.

3. The waterproof cement mortar screed layer is densely combined with the foundation, without hollowing, the surface is smooth and clean, without cracks, sanding, and the yin and yang angles are made into an arc.

4. The waterproof layer of the coating film is evenly brushed, and the thickness meets the requirements of the technical regulations of the product, and the general thickness is not less than the bottom.

5. The use of construction stubble should be lapped in the direction of flowing water, and the lap width should not be less than 100mm, and more than two layers of fiberglass cloth should be staggered by one-half of the width when the upper and lower laps are used.

6. The surface of the base should be smooth, and there should be no defects such as hollowing, sanding, and cracking. The moisture content of the base layer should meet the construction requirements of waterproof materials.

7. The waterproof layer should extend from the ground to the wall, 250mm above the ground. The waterproofness of the bathroom wall shall not be less than 1800mm.

8. The surface of the coating film is not blistered, does not flow, is smooth and has no concave and convex, and the joints of pipe fittings, sanitary ware feet, floor drains, and drainage ports are tight, and the end is smooth and non-leaking.

9. The thickness and strength of the cement mortar of the protective layer must meet the design requirements, and it is strictly forbidden to destroy the waterproof layer during operation.