What happens to the leakage of the roof at the bathroom flue?

The waterproof layer laid on the bathroom floor has been drilled through by you, and you want to do it to plug it.

If you don't have a water pipe up there, you're upstairs.

If this phenomenon occurs every year, then I think it is the 'thermal bridge phenomenon' that causes the indoor heating is not very good, the external wall insulation is not done or there is a problem, the thermal bridge is due to the decrease in the temperature outside, the beams, plates, and columns are cold, resulting in water condensation in these places, but generally appear in the corner of the windy wall, yours is a little special, it seems to have something to do with you on the top floor, if so, then you can solve it by tiling in the kitchen (yours is the mother and son flue), the bedroom can be done with interior wall insulation, simple point, only in the appearance' Water seepage' point wall surface to do interior wall insulation.

The most likely cause of a leak in the bathroom is a cracked waterproofing layer. The most reliable solution is to smash it and redo the floor to make it waterproof.

Generally, there are two reasons for water leakage in the bathroom, one is water seepage on the ground, and the other is water seepage caused by broken water pipes. The manifestation of this situation is that the leakage is continuous and uninterrupted, and sometimes the leakage amount is constantly increasing, such as closing the main valve of the water reform balance, and the leakage will be reduced immediately. First of all, the nuclear inspection team observes the leakage and makes a record, and then turns on all the faucets, toilets and drains the water multiple times, and pours water into the leakage.