WATERPROOFING · LEAKS · LEAK DETECTION
The stain downstairs starts under your bathroom.
Water coming through to the flat below is usually the bill for a step skipped years ago. We find the source first, then rebuild the waterproofing in the right order.
- English-speaking team
- Free site visit
- Written fixed quote after the visit
THE SHORT ANSWER
Waterproofing goes on before the tiles, starting at the corners.
The right order: strip-out, plumbing, a screed falling to the drain, primer, reinforcing tape at corners and pipe penetrations, then two coats of liquid membrane. Once it cures, a water test, and only then the tiles. On our jobs a two-coat membrane, corner tapes and a water test before tiling are standard.
WHERE THE WATER COMES FROM
Three possible sources, three different fixes.
Any repair made without knowing where the water comes from is a guess. A leak usually comes from one of three places:
- Supply pipe: a pressurised pipe leaking inside a wall or floor. The stain grows even when no one showers.
- Waste and traps: a joint failing at the shower, basin or WC drain. It shows when water is used.
- Membrane and grout: no waterproofing in the shower zone, or water getting through cracked grout.
LEAK DETECTION
Find it first, then open up.
We also do leak detection. The point is to narrow down where the water is coming from without breaking up the whole bathroom. If it's a single point, such as a waste joint, we open and repair just that. If there was never a membrane, we renew the wet zone's waterproofing.
If the neighbours below have complained, waiting makes the damage bigger. In an active flood, shut the main valve first and use our water-damage line.
WHO PAYS
Tenant or landlord?
As a general rule the landlord must keep the property fit for use (Code of Obligations art. 301), so a leak from ageing pipes is usually the landlord's matter; damage from the tenant's misuse can be the tenant's. General information, not legal advice.
PROCESS
Four steps. None of them skipped.
Find the source
We establish whether it's the supply, the waste or the membrane.
Repair the cause
If it's one point, we open and repair just that.
Proper waterproofing
Where needed, screed with falls, corner tapes and a two-coat membrane.
Finish and handover
Tiles, grout and silicone once the membrane has fully cured, then a final check together.
PRICE FROM A PHOTO
Get a first price before anyone visits.
Most bathroom quotes only arrive after a site visit. We look at your photos first: WhatsApp opens with the message ready — just add photos of the bathroom.
- Take a few photosThe floor, the walls, the shower or bath side and the basin. A close-up of any leak or crack.
- Add a line of detailRough m², what's changing (tiles, sanitaryware, shower, plumbing), building age, any leak to the flat below, and when you'd like to start.
- Get a first priceDuring working hours (09:00–19:00) we reply on WhatsApp within 15 minutes; outside them, first thing next morning. The exact price comes in writing after a free site visit.
Can't take photos right now? Leave your number and we'll call.
QUESTIONS
About bathroom waterproofing & leaks
How is bathroom waterproofing done?
After strip-out and plumbing: a screed falling to the drain, primer, reinforcing tape at corners and pipe penetrations, then two coats of liquid membrane. Once cured, a water test, then the tiles.
Can a bathroom be waterproofed without removing the tiles?
Re-grouting and clear surface coatings can stop some small leaks for a while, but they don't replace a membrane under the tiles. The lasting fix is a targeted repair at the source, or renewing the wet zone's waterproofing.
Water is coming through downstairs — how urgent is it?
Waiting enlarges the damage, including to the neighbour's ceiling. We find the source first; in an active flood, shut the main valve and call our water-damage line.
Do you do leak detection?
Yes. The aim is to find the leak without breaking up the whole bathroom, and open only where needed.
Who pays for a leak, tenant or landlord?
A leak from ageing pipes is usually the landlord's matter (art. 301); damage from misuse can be the tenant's. Your contract and the facts decide — not legal advice.
Emergency water-damage line →Waterproofing guide →Ventilation and mould →
Can't take photos right now? Leave your number.
We'll call you today and pin down the scope with a few questions. Visits are free; the price is fixed and in writing.
Send us photos of your bathroom. We'll send a first price.
WhatsApp opens with the message ready — add photos of the bathroom and we'll reply with a first price within 15 minutes in working hours (09:00–19:00). Site visits are free.
- English-speaking team
- Free site visit
- Written fixed quote after the visit
OUR CREW HAS WORKED ON
Four SeasonsGrand HyattCrowne Plaza