A technician applying a lining coat to the inner wall of an emptied water tank
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Water tank sealing in Al Nazlah Al Sharqiyah Jeddah

Al Nazlah Al Sharqiyah is a densely populated residential quarter in south Jeddah with old apartment blocks packed along narrow streets serving a large population. Tanks here face intense daily usage pressure, and salt water and humidity degrade linings and joints quickly. Tank treatment requires precision because water outage affects hundreds of residents.

  • Potable-rated materials

    Linings and disinfectants cleared for drinking water tanks, not general-purpose products.

  • You get the downtime first

    How many hours the tank is out of service, told before we start rather than after we finish.

  • A first-draw flush

    We run the first draw off after refilling, and the tank is not handed back until the water runs clear.

  • Ground and roof tanks

    Villas, apartment blocks and premises that need a written record of each visit.

Why the job is different in Al Nazlah Al Sharqiyah

The apartment buildings here were built thirty years ago or longer, and roof-mounted ground and overhead tanks sit directly exposed without adequate insulation. The method is set out in full on what Water tank sealing involves.

The first reason

Overhead tanks on exposed rooftops

Most buildings have tanks mounted on roof slabs exposed to direct sun year-round. High heat and solar radiation break down the concrete lining quickly and cracks emerge within a few years.

The second reason

Weak pipe joints and entry points

Old tanks have inlet and outlet pipes without fitted metal flanges. Small leaks begin at the joints and expand under daily pressure cycles.

The third reason

Intense daily usage and high pressure

The large population uses water continuously and tanks fill and drain many times daily. This pressure stresses the lining, joints and floor.

Al Nazlah Al Sharqiyah on the map

Al Nazlah Al Sharqiyah sits about 1 km from Al Nazlah Al Yamaniyah and about 1.5 km from Al Thaghr.

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Before treatment

What we read before any material is opened

A densely built residential quarter in south Jeddah adjoining Al Nazlah Al Yamaniyah to the north, with Old Makkah Road on its northern edge, Madain Al Fahd to the east and Al Quraiyat to the west. Buildings are older and the population dense.

A fine crack running through a concrete wall

Cracking in the wall

Lining surface inspection reveals concrete cracking from heat and pressure stress, especially at corners and floor joints.

The junction of a concrete floor and wall inside an empty tank

The floor to wall joint

The floor-to-wall joint inspection finds moisture and small seepage from continuous daily pressure.

A coating flaking away from a concrete surface

The condition of the old lining

Pipe and outlet port inspection shows rust and corrosion from salt water and humidity.

Limescale deposits inside a water pipe

Sediment and scale

The dry and hot environment accelerates lining drying but daily pressure cycles cause stress cracking.

Water pipes passing through a concrete wall

The pipe entries

The old concrete lining splits at stress points, especially around pipe openings and corners.

A metal cover over a water tank opening

The hatch and the vent

Leaks develop at joint weak points and widen with repeated daily fill and drain cycles.

How we work

  1. 1

    Inspect with the tank empty

    We drain it and read the surface dry: whether the water leaves through a crack, a joint or a pipe collar, and what the outer face of the wall and the ceiling below are telling us. A level test with the valves closed separates a leaking tank from leaking pipework.

  2. 2

    Clean and prepare the substrate

    Sediment out, a high pressure wash, the loose old lining and the weak surface layer of the concrete taken back, then dried. The material grips sound substrate and nothing else.

  3. 3

    Make the cracks and joints good

    Cracks are chased out and filled with a repair mortar, a cove is formed where the floor meets the wall, and every pipe collar is treated on its own.

  4. 4

    Lining, fill test, sterilisation

    Successive coats, each run across the one beneath it, on the face the water touches. Then a full cure, a fill with the level watched, and sterilisation with the first fill run to waste before the tank returns to use.

What water tank sealing includes

  • A technician inspecting with a flashlight

    Finding where the water leaves

    Carried out drained and dry: cracks, joints, pipe collars and the outer face of the wall.

  • A metal floor drain

    Draining and sediment removal

    The last of the water and the settled layer on the floor come out, because a lining does not stick over sediment.

  • A gloved hand applying bait into a joint

    Cracks and joints made good

    The crack opened and filled, a cove formed at the floor to wall junction, and each pipe entry worked separately.

  • A spray nozzle in close detail

    Lining coats on the water face

    More than one coat, each crossing the one below, in material made for drinking water tanks rather than roof waterproofing.

  • A clean kitchen counter after treatment

    Curing, fill test and sterilisation

    The material is left to cure, the tank is filled and the level watched, then sterilised and the first fill run to waste. How long the cure takes follows the material and the weather, and we tell you before the date so you can plan around the supply.

  • The visit report being written on a clipboard

    A follow-up level check

    We come back once it is in service to read the level and check the outer face, because any remaining loss shows up then rather than on the day of the work.

The character of Al Nazlah Al Sharqiyah

Apartment district: residential blocks, repeated floors and shared entrances

Older apartment buildings mean tanks are basic in design and placed without adequate support or insulation. Treatment must account for the old roof structure and may require reinforcing supports before relining.

Questions about this district

Why does tank lining crack so quickly here in Al Nazlah Al Sharqiyah?

Direct sun, high heat and intense daily use all cause rapid cracking. Old tanks cannot withstand this pressure cycle.

Can we patch cracks without draining the entire tank?

No, the tank must be completely drained. We empty it, inspect the floor, walls and joints, repair all cracks and relining the water-contact surface.

What happens if we do not repair the pipe joints?

Leaks start small but widen over time. This leads to significant water loss and weak pressure in upper floor units.

Does the new lining need thermal insulation?

Yes, we use UV-resistant lining and may add thermal insulation to reduce sun impact.

How often should tanks be inspected in older buildings like these?

A quick inspection every one or two years is best. If leaks appear or water discolours, immediate inspection is needed.

Does salt water speed up tank deterioration?

Yes, salt reacts with concrete and weakens it. In coastal areas like Jeddah, water salinity is higher.

How much does water tank sealing in Al Nazlah Al Sharqiyah cost?

It is set after the inspection, because the price follows the type of infestation, the size of the space, how far it has spread and the number of visits it needs. Send a photo and a description on WhatsApp and we will give you an estimate before we reach Al Nazlah Al Sharqiyah.

Other services in Al Nazlah Al Sharqiyah

Other services we provide to residents of Al Nazlah Al Sharqiyah.

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