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Raghwat Al Janoub Maintenance and Cleaning

Water tank waterproofing in Umm Sulaim, Riyadh

Umm Sulaim is an apartment district of mid-rise buildings where a single roof tank serves many storeys. A shared tank that leaks sends damp up and down multiple walls at once, affecting residents on different floors simultaneously. Sealing the inside face protects all the flats from one source at once.

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Why a tank needs sealing, not patching

  • Water you store stays stored

    A lined tank keeps the water it holds instead of feeding a slow leak into the slab.

  • The damp stain has a cause

    The wet patch on the ceiling or wall below a tank is the symptom, and the tank is usually the cause.

  • Safe to hold drinking water

    The materials we apply are rated for potable water, so the tank is safe to drink from once it is back in use.

  • Proven before you rely on it

    We do not hand a tank back on trust.

Why the job is different in Umm Sulaim

Shared roof tanks serving entire apartment blocks develop slow seeps at first, then worsen noticeably during summer heat and the higher water demand of repeated fills. The whole method is set out in our notes on water tank waterproofing.

  • One tank leak, dampness across many storeys

    A roof tank that supplies a whole residential building may leak from a single point, yet the damp appears on walls in different flats across multiple floors. Patching the wall in one flat solves nothing for the flat below. Sealing the tank from inside stops the leak at source and protects every floor at once.

  • Tanks of different ages and different crack patterns

    Apartment blocks in Umm Sulaim rose in separate phases, so tank ages range from ten years to thirty. Older concrete shrinks and cracks differently than newer pours. An initial inspection identifies the tank's age and the exact crack positions before choosing the right waterproofing material for that particular age and condition.

  • Coordinating water supply across building residents

    Sealing a shared tank means draining it completely, which cuts water to every flat at once. Residents need to agree on a single day, and the work must finish before the mains pressure returns. Knowing the number of storeys and units lets us plan the drain and refill time precisely.

What's Included

The apartment buildings in Umm Sulaim were built in phases over decades, so the tanks have varying ages. Some tanks are older than others, and leaks typically begin from tanks that have stood for more than a decade.

  • Emptied and fully dried

    A shared tank serving an entire building must be drained completely before work begins, which requires coordination with building management and advance planning of the date.

  • Cracks and leak points surveyed

    Old tanks in Umm Sulaim often have cracks in several places, and a careful initial survey identifies each one before the coating is applied.

  • Surface prepared before coating

    The surface of older concrete needs thorough preparation to remove mineral scale and salts, work that is more demanding on aged tanks than on recently built ones.

  • Waterproofing applied in coats

    Waterproofing material is applied in multiple coats, each drying before the next is added, and coat thickness varies based on crack size and concrete condition.

  • Full curing time

    Full curing of the waterproofing takes longer on large, older tanks in Umm Sulaim, and the material needs suitable temperature conditions to set properly.

  • Fill test before handover

    The refill happens gradually while we monitor the tank for any new seepage, and the test continues for a full day before we hand the tank over to the residents.

Umm Sulaim on the map

Umm Sulaim sits about 1 km from Al Wisham and about 1 km from Al Shumaisi.

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How we work

Look at the tank

Drain and prepare

Apply and cure

Fill, test and hand over

Some of our work

Photos from our team's work.

  • A tower elevation with clean reflective panels beside panels carrying dark streaks
  • Two technicians on ropes washing a faceted metal facade at night with a pressure lance
  • A crew on ropes midway down a blue glass tower topped by two masts
  • Three technicians on ropes above a curved glass roof over a building atrium
  • Five technicians on ropes cleaning the yellow and grey elevation of a medical building
  • Seven technicians in yellow helmets descending parallel ropes on aluminium cladding

The character of Umm Sulaim

Apartment district: residential blocks, repeated floors and shared entrances

Apartment buildings in Umm Sulaim share a single roof tank, so a leak affects multiple flats at once and residents on different floors simultaneously. Coordination with residents and building management is essential because the tank cannot drain and refill without cutting water to the entire building.

Other services in Umm Sulaim

The room and the building around it are on one list.

Nearby districts we cover

Questions before booking

Will water be cut to every flat in the building at the same time?
Yes, draining the roof tank cuts water to all flats simultaneously. The drain and refill time depends on tank depth and the number of storeys served. We plan the work for a set day, and water returns to all flats once the tank is refilled and tested.

How do we notify all residents and tenants about the work date?
Coordination usually happens through the building management or residents' committee. It is best to notify residents at least a week ahead. The notice states the water cut date and how long it will be off, so residents can prepare and store water if needed.

Does a shared building tank need deeper sealing than a villa tank?
A shared tank serving dozens of families needs careful initial inspection because one leak affects many residents. Larger tank volume means a bigger surface area to seal and cure. Concrete thickness and crack patterns determine which material suits that particular tank.

Can the tank be sealed while keeping water in the lower floor flats?
No, the roof tank must drain completely so pressure drops and work becomes safe. After draining and cleaning, applying the waterproofing requires a completely dry surface. The refill and test happen at the end before water is distributed to all flats.

Do tanks crack faster in Umm Sulaim than in newer neighbourhoods?
Some buildings in Umm Sulaim were built thirty years ago, and older concrete shrinks and cracks naturally. Thermal expansion and contraction in summer heat speeds cracking. Newer tanks with better reinforcement crack more slowly.

After sealing the tank, how long before damp disappears from flat walls?
Damp takes time to leave walls and depends on wall thickness and age. Old walls hold moisture longer than new ones. Drying usually begins weeks after the leak stops, but the paint may not fully restore for several months in older buildings.

How much does water tank waterproofing in Umm Sulaim cost?
It is set after we have seen the job, because the price follows the size of the place, its condition and the time the work takes. Send a photo and a description on WhatsApp and we will give you an estimate before we reach Umm Sulaim.

Need water tank waterproofing in Umm Sulaim? Tell us about the place and we will tell you what it needs

We reach Umm Sulaim at a time we agree, and you get the full cost before we start.

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