Water tank sealing in Al Kawthar Jeddah
Al Kawthar is a young district east of the airport, with modern apartment buildings and villas built over the past decade on a regular street grid. The tanks here are new but rapid construction may leave defects in the pour or leaks at joints. Sealing protects the tank from early cracking and rapid deterioration under desert heat.
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Potable-rated materials
Linings and disinfectants cleared for drinking water tanks, not general-purpose products.
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You get the downtime first
How many hours the tank is out of service, told before we start rather than after we finish.
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A first-draw flush
We run the first draw off after refilling, and the tank is not handed back until the water runs clear.
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Ground and roof tanks
Villas, apartment blocks and premises that need a written record of each visit.
Why the job is different in Al Kawthar
Buildings here are less than ten years old, and new concrete tanks often show fine cracks due to settlement or thermal movement, especially in villas with exposed rooftop tanks. The method is set out in full on the full Water tank sealing page.
New villas with rooftop tanks
Villas in Al Kawthar have small tanks on roofs or directly above ground slabs. Sun and heat cause rapid expansion and contraction, and cracks may appear in year one or two.
Pipe entries and joints
New tanks have multiple inlet and outlet pipes. Rapid pouring may not seal these joints fully, and leaks often start here.
Hard water and mineral salts accelerate decay
Jeddah water is very hard and mineral-rich. Salt deposits build on tank walls inside and accelerate erosion of the concrete matrix.
The character of Al Kawthar
New development: ongoing construction and vacant plots between the homes
New villas in Al Kawthar have exposed rooftop tanks or tanks shielded only by simple covers. Direct sun and extreme heat accelerate cracking and deterioration, making sealing essential to protect the tank from desert conditions.
What we read before any material is opened
A newly developed district east of King Abdulaziz International Airport, between Al Hamdaniyah to the north and Al Rayyan to the south, laid out on a wide street grid near Prince Khalid bin Abdullah Road.
Cracking in the wall
Fine cracks in the tank base leave damp patches on the outer face below the tank, marking early seeping.
The floor to wall joint
Leaks from inlet and outlet joints leave steady wetness around the pipes, common in small rooftop villas.
The condition of the old lining
The floor-to-wall joint may crack if the tank settles slightly, very common in new villa construction.
Sediment and scale
Moisture from water spillage during filling may pool beneath the tank and weaken the supporting structure.
The pipe entries
Stress cracks cluster at inner and outer corners where loads concentrate.
The hatch and the vent
Foam or water discolouration signals early concrete erosion inside from salt and moisture.
How we work
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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.
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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.
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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.
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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
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Finding where the water leaves
Carried out drained and dry: cracks, joints, pipe collars and the outer face of the wall.
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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.
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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.
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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.
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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.
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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.
What is different about Briman Sub-Municipality
Briman sub-municipality sits east of the Haramain expressway on Jeddah's north eastern edge. Its older quarters are planned grids of villas and walk-up flats, while the outer districts are new subdivisions still being built out. Seasonal wadis such as Wadi Umm Hablain and Wadi Al Asla cross the area, groundwater runs high in places, and drainage networks in the newer districts are incomplete, so soil around foundations stays damp. Vacant plots, live building sites and constant dust give crawling insects and rodents easy routes into homes, and the food outlets along the main arteries keep them supplied.
Questions about this district
Does a new tank need sealing immediately after construction?
No, it is better to wait one to two years for the tank to settle. But if fine cracks appear from settlement or heat stress, sealing stops them before they widen.
What is the difference between a hairline crack and a serious one in a new tank?
A hairline crack leaves a damp patch on the outer face. A serious crack leaves visible seeping or steady wetness, and sealing is then essential before the structure weakens.
Does sealing a tank extend its working life?
Yes. The lining protects the concrete from moisture, salt and sun. A sealed tank lasts much longer than an unsealed one.
Is drinking water safe after sealing right away?
Yes, but flush it several times with running water first. Final sterilisation confirms water safety.
Is sealing the same method for villas and apartment blocks?
The sealing principle is the same, but villas have smaller tanks on exposed roofs and blocks have larger tanks, sometimes covered. Tank size affects treatment time.
How often must sealing be repeated?
Good sealing typically lasts 10-15 years. After that you may need renewal if new cracks appear or leaks restart.
How much does water tank sealing in Al Kawthar 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 Kawthar.
Nearby districts we cover
Other services in Al Kawthar
Other services we provide to residents of Al Kawthar.
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Water tanks
Water tank cleaning
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Water tanks
Water tank sterilization
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Water tanks
Tank leak repair
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Residential
Cockroach control
Need water tank sealing in Al Kawthar? Tell us what you saw and we will tell you what it needs
We reach Al Kawthar at a time we agree, and you get the full cost before we start.