Bathroom and kitchen waterproofing — service guide
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A bathroom floor is flooded with water daily; if there is no seamless membrane beneath it turning up the walls, water reaches the ceiling below or the adjoining wall. Waterproofing before tiling is the complete solution, and treating an existing bathroom is possible in specific cases without breaking — the survey decides which path fits your case.
What we waterproof and how
- Before tiling (new or renovated bathroom): a flexible cementitious or liquid membrane on the floor turning up the walls to a suitable height (higher in the shower area), with corner tape where floor meets wall and around drains and pipes, then a flood test before tiling.
- Balconies and light wells: the same principle with attention to falls towards the drain and the threshold edge.
- Kitchens: the sink and washing-machine area and behind base cabinets.
- Existing bathroom without breaking: treating grout, joints, corners and the drain surround with clear or coloured sealants after confirming the leak is from the floor and not a pipe. This works when the original membrane exists and only the details failed; otherwise we say it plainly: breaking is necessary.
When do you need it?
- A damp patch on the ceiling below a bathroom or kitchen.
- Damp or peeling on the wall shared with the bathroom seen from the next room.
- A new bathroom before tiling, or a renovation with new tiles.
- Eroded grout, loose tiles and a persistent musty smell.
- Before buying or renting, after a leak inspection result showing the floor rather than a pipe is the source.
Execution steps before tiling
- Inspect and identify the source: separate a pipe leak (repaired first) from floor dampness.
- Preparation: a clean level substrate, crack treatment, and fixed drains and pipes.
- Corners and details: waterproofing tape in corners and around drains, pipes and the threshold.
- Membrane coats at the recommended thickness and drying time.
- Flood test for a set period while watching the ceiling below — no tiling before it passes.
- Tiling (if in the quote) with an adhesive compatible with the membrane and a grout suited to wet areas.
- Documentation in the insulation quality record.
Included and excluded
Included: survey, the membrane with its layers and details, flood test, documentation and warranty. May be added by separate quote: removing old tiles, replacing pipes, tiling and finishing. Everything is written in the quote before starting.
How the service runs, step by step
- Booking
Number of bathrooms/kitchens and the construction stage (before tiling / after / renovation) in the order form.
- Survey and quote
Checking the source and the condition of floor and walls, then a written quote defining the method.
- What we need from you
Clear the bathroom, stop using it during execution and testing (a day or more), and access to the floor below to watch the flood test.
- Execution and test
One to three days per bathroom depending on method and drying time.
- Handover
Execution record and warranty certificate with verify code.
What you receive
- A written quote defining the method (before tiling / no-break) and materials.
- An execution record with before/during/after photos and the flood-test result.
- A numbered warranty certificate with verify code stating period and exclusions.
- Usage guidance: avoid harsh abrasives on grout, keep drains clear.
How pricing works
Published inspection fee: 150.00 SAR (VAT included). Any further work is quoted after the on-site assessment, in writing, before it starts.
Priced per bathroom or per square metre by method: waterproofing before tiling depends on area and the upstand height; no-break treatment on the extent of details. Tile removal and tiling are separate items if requested.
Verifying the report and warranty
Every inspection report and warranty certificate we issue carries a serial number, a verification code and a QR code. Enter the code on the verification page to confirm the document really came from us, that it has not been altered or revoked, and the warranty expiry date where one applies. A buyer, landlord or insurer can verify it the same way without contacting us.
Frequently asked questions
Can a bathroom be waterproofed without breaking?
In specific cases yes: when the original membrane exists and the problem is in grout, corners or the drain surround. If the original membrane is absent or failed, the reliable solution is waterproofing before new tiling, and we say so after inspection.
How do you confirm the source is the floor and not a pipe?
By pressure-testing the lines and moisture readings before any waterproofing. Waterproofing a floor over a leaking pipe solves nothing.
How long per bathroom?
Usually one to three days between preparation, coats and the flood test, before tiling.
How high does the membrane go up the walls?
By zone: higher in the shower and bathtub area and around the basin, lower elsewhere. Stated in the quote.
Does the warranty cover the tiles?
The warranty covers the membrane and executed details. Tiling, if we do it, is included in the warranty or clearly excluded in the certificate.
Do you waterproof balconies and light wells?
Yes, with the same method and attention to falls, the threshold and the rain drain.
On-site service is available in Saudi Arabia; the guides and tools can be read anywhere.
This page is informational and educational. Confirming a leak, an insulation condition or a pest infestation always requires an on-site assessment, and structural questions are for a licensed engineer. We do not publish promises we cannot prove.