RSK Renovation — Premium Renovation & Fit-Out, Dubai

Overview

Judged Entirely by What Does Not Happen.

Waterproofing is the only trade whose work is judged entirely by what does not happen.

It is also invisible once finished, which is why it is the line most often trimmed from a quotation and the failure most expensive to put right. Redoing a bathroom membrane means demolishing the tiling, the screed and the fittings that were laid on top of it.

RSK carries out waterproofing across Dubai as part of its renovation projects and as standalone work, with systems selected for the location rather than applied generically.

Waterproofing Services at a Glance

Bathrooms and wet areas: floors and wall zones, tanked and tested before screed

Kitchens: sink and appliance zones

Roof slabs: exposed and covered roofs, including parapet upturns

Terraces and balconies: particularly where habitable space sits below

Planters: internal and external, where soil sits against structure

Swimming pools: shell waterproofing and fill testing

Water tanks: potable and non-potable

Basements and retaining walls: tanking against ground water

Leak investigation: tracing the source before any repair is priced

Remedial waterproofing: targeted repair where a system has failed locally

Get a Written BOQ

What It Involves

What Waterproofing Involves

The membrane is a small part of the job. The preparation and the test are the rest of it.

A properly executed waterproofing sequence runs: clean and prepare the substrate, repair defects and cracks, form fillets at floor to wall junctions, treat every penetration, apply the system in the specified number of coats, cure, then flood test and hold.

That test is the whole point. It is the only moment at which a mistake can be found while it is still cheap to correct. Once screed and tile go on top, the next time the system is inspected is when water appears somewhere it should not.

Penetrations are where failures concentrate: drain outlets, pipe entries, light niches in pools, and the junction where floor meets wall. Those details take longer than the open areas and matter more.

Project Types

Types of Waterproofing System

Cementitious

A cement-based coating brushed or sprayed onto the substrate. Bonds well, tolerates being tiled directly, and suits internal wet areas, water tanks and pool shells. Rigid, so it does not accommodate much movement.

Liquid applied membrane

Polyurethane or acrylic applied as a liquid that cures into a seamless flexible film. Handles movement and complex shapes well, suited to roofs, terraces and balconies. Needs correct thickness, which is easy to under-apply.

Torch-applied bituminous sheet

Rolls of bitumen membrane bonded with heat. Long established, durable and thick, commonly used on roofs and below ground. Laps and detailing around penetrations are the critical part, and hot works permits usually apply.

Sheet membranes and tanking

Preformed sheets used below ground and in basements, where hydrostatic pressure is a factor rather than just surface water. Choosing between systems is about movement, exposure and what goes on top.

Technical

Why Systems Fail Here, and Finding the Leak

Why waterproofing fails in Dubai

Heat and movement do most of the damage, and poor detailing does the rest.

Roof surface temperature: exposed roof slabs reach temperatures that age membranes faster than in temperate climates, particularly with no protective screed or covering. Thermal cycling: daily expansion and contraction works at laps, upturns and junctions, which is where systems open first. Inadequate upturns: a membrane that stops at floor level rather than running up the wall lets water track behind it. Poor penetration detailing: drains, pipes and niches are where most leaks start. Insufficient thickness: liquid systems applied thinner than specified look identical and perform differently. No fillet at junctions: a sharp internal corner is a weak point. A coved fillet is not decoration. Skipping the flood test: the failure is then found by the person living below.

On coastal plots, salt-laden air also accelerates corrosion of anything metallic penetrating the membrane, which becomes a leak path over time.

Leak investigation

Find the source before specifying the repair. Water rarely appears where it enters.

A damp patch on a ceiling is evidence of where water arrived, not where it got in. It can track along a slab, follow a conduit, or run down a pipe for some distance before showing itself.

Investigation usually means isolating possibilities in order: is it plumbing supply, drainage, a failed membrane, or condensation from AC? Each behaves differently. A supply leak is constant, a drainage leak follows use, a membrane failure follows rain or washing down, and condensation follows the weather and the AC.

Repairing before that is established is how the same leak gets repaired twice.

Approvals

Do You Need Approval for Waterproofing in Dubai?

Usually it follows the wider project rather than needing its own approval.

Waterproofing inside an apartment, as part of a bathroom or wet area, is covered by the building management approval for that work. Standalone remedial waterproofing still normally needs the building notified, particularly where it follows a leak into another unit.

Roof and external waterproofing in an apartment building is usually the responsibility of the owners association rather than an individual owner. In a villa it is the owner's, and community rules on access and working hours apply.

Where torch-applied membranes are used, hot works permits are commonly required, which is a building and safety matter rather than a planning one.

Cost

How Much Does Waterproofing Cost in Dubai?

Priced by area, then driven by preparation and the number of details:

Area

The baseline measure for any system

System specified

Cementitious, liquid applied and torch-applied differ substantially

Number of coats or thickness

A specified thickness costs what it costs. Under-applying is where quotes differ

Substrate condition

Sound and level against repair and re-screeding first

Number of penetrations

Drains, pipes and niches take longer than open area

Upturn height

Running up walls adds area and detailing

Removal of existing

Stripping a failed system before applying a new one

Screed and falls

Correcting falls before waterproofing where water currently ponds

Flood testing

Should be its own line, with a record issued

Access

Roof and basement access can add plant and time

Reinstatement

Tiling, screed and fittings replaced over the new system

The number that matters

Not a per-square-foot estimate from a website — a written BOQ after a site visit, showing quantities, materials, exclusions and payment milestones.

Usually excluded from cheap quotes

Approvals and drawings, protection of retained finishes, MEP upgrades, waste removal, snagging after handover, and anything described as "subject to site condition".

Read the full guide: how renovation cost is built up in Dubai →

Timeline

How Long Does Waterproofing Take?

Curing and testing dominate the programme, and neither can be shortened.

Each coat needs to cure before the next. The completed system needs to cure before testing. The flood test itself needs to be held long enough to show a measurable result. Only then can screed and finishes go on.

This is why waterproofing looks like a delay on a programme and why compressing it is so tempting. It is also why it is the wrong place to compress.

Avoid These

Mistakes That Cost Money

Skipping the flood test. It is the only inspection the system ever gets before it is buried.

Waterproofing over uncorrected falls. Ponding water sits on the membrane and finds its weakest point.

Stopping the membrane at floor level. Water tracks up and behind. Upturns are part of the system, not an extra.

Using one system everywhere. A roof and a bathroom floor face different problems and need different products.

Repairing a leak before locating it. Water travels. The damp patch is where it arrived, not where it entered.

Applying liquid systems thinner than specified. It looks the same on the day and behaves completely differently in two years.

Checklist

What to Check Before You Start

Which system is specified, by name

The specified thickness or number of coats

Whether upturns are included and to what height

How penetrations and junctions are detailed

Whether a fillet is formed at floor to wall junctions

Whether existing failed membrane is being removed or covered

Whether falls are being corrected before application

Whether a flood test is included and a record issued

Who is responsible for reinstating screed, tiling and fittings

For torch-applied systems, whether a hot works permit is arranged

Ask specifically for the system name, the specified thickness or coat count, and whether a flood test with a written record is included. Those three lines are the difference between a waterproofing quote and a guess.

FAQ

Waterproofing FAQs

How do I know if my waterproofing has failed?

The usual signs are damp patches on a ceiling below, efflorescence or staining on walls near a wet area, loose or hollow tiles, and persistent musty smell. In a pool, unexplained water loss. Investigation should establish the source before any repair is priced.

Which waterproofing system is best?

There is no single best system. Cementitious coatings suit internal wet areas, water tanks and pool shells. Liquid applied membranes handle movement and suit roofs, terraces and balconies. Torch-applied bituminous sheet is used on roofs and below ground. The right choice depends on movement, exposure and what is going on top.

Do you have to remove the tiles to fix waterproofing?

In most cases yes, because the membrane sits underneath them. Some surface-applied remedial products exist, but where a membrane has genuinely failed, treating it from above is a temporary measure rather than a repair.

What is a flood test?

The waterproofed area is filled with water and held for a set period, with the level monitored and the area below checked. It is the only opportunity to find a defect while it is still inexpensive to correct, and the record should be issued as part of the handover.

Why does waterproofing fail faster in Dubai?

Roof and external surfaces reach high temperatures, and the daily expansion and contraction works at laps, upturns and junctions. Add coastal salt on some plots and the exposure is harder than in cooler climates.

Do I need approval for waterproofing work?

It usually follows the approval for the wider project. Standalone remedial work in an apartment still normally needs the building notified, particularly after a leak. Torch-applied systems commonly require a hot works permit.

Can you find a leak without breaking anything?

Investigation starts with non-destructive steps: isolating supply and drainage, observing when the leak appears, and checking whether it follows rain, use or weather. Opening up comes only once the likely source is narrowed down.

Book a Waterproofing Survey

Tell us where the problem is and when it appears, or what area needs treating. We will establish the cause before quoting, and specify the system, thickness and test in writing.

+971 8001 217 info@rskrenovation.ae

Dubai, United Arab Emirates

Waterproofing in Dubai