Thanks. We use that bathroom to clean mop is smaller than other bathroom. After I check, water is from wet floor while cleaning mop and didn’t dry wet area property. This happened repeatedly for last few months and there is no more water outside and remain same status in the pics since we clean wet area. Can I leave it with no repair if no more water?
If your bathroom waterproofing is intact, even if your floor is wet, water will not be seeping up to the wall.
Don't bother repairing the wall and the wood skirting unless you intend to keep the bathroom floor perpetually dry as this will be a recurring problem. Furthermore, since the waterproofing is worn out, it only a matter of time before your downstairs neighbour complain about water stains and leakage on their ceiling.
Usually a bathroom floor have a drop so that water collects like a pan and flows into the floortrap. Yours is almost flush with the outside floor. U hv a marble threshold to act as a kerb. This is very unusual as the waterproofing boundary will have no way to terminate properly. We dont know whether that wall is inside or outside the waterproofing zone.
One way is to do an epoxy coating on the entire toilet floor to recreate a drip pan like effect. Other than that is really all guesswork.
The door frame shouldn't be sitting on your bathroom floor, water shouldn't be touching your door frame. There should at least be a minimum of 20mm drop between the bathroom and outside space. Is there a floor waste near the shower area? Doesn't really make sense for water to flow to that wall area... seems that part of the wall is not waterproof.
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