Water tank sealing in Al Ajawid Jeddah
Al Ajawid is a quiet residential district in south Jeddah set on higher ground, which means water tanks here experience lower water pressure and corrode faster than tanks in low-lying areas. Residential buildings and villas are comparatively old and tanks have not been sealed for years. Cracks and leaks are common in both overhead and ground-level tanks.
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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 Ajawid
Most villas and apartment buildings in Al Ajawid were built 20 to 30 years ago, and the original tanks now show signs of corrosion and leakage. The method is set out in full on how we approach Water tank sealing.
Overhead tanks on old roofs
Older villas and buildings in the district carry metal or concrete tanks on their roofs. The old concrete roof surfaces create continuous moisture around the tank base and corrode the tank from below.
Elevated ground and seasonal cracks
The natural elevation of the district and large day-night temperature swings cause tank expansion and contraction. Cracks appear at joints and corners, especially in summer.
Old entry and exit pipes and rust
Older villas have galvanized or mild steel pipes entering the tank at the base. The pipes are corroded and joints are weak, and moisture seeps around these points.
The character of Al Ajawid
Mixed district: shops at street level with homes above them
Al Ajawid is a mix of old villas and apartment buildings, each requiring different sealing methods. Villas have tanks on old roofs and weak entry pipes, while buildings may have underground tanks surrounded by high soil moisture.
What we read before any material is opened
A quiet residential district in south Jeddah on elevated ground, bounded by the Jeddah Makkah Expressway to the north, Al Fadl to the east, Al Shifa to the south and Al Huda to the west, containing low apartment buildings, villas and residential plots.
Cracking in the wall
Metal tanks on old roofs corrode from below where they meet wet concrete.
The floor to wall joint
Corner and joint cracks between walls and floors appear from thermal expansion and seasonal movement.
The condition of the old lining
Old metal entry and exit pipes corrode and leak around the entry points.
Sediment and scale
Moisture collects around overhead tanks due to old concrete roofs and poor ventilation.
The pipe entries
The floor and base corrode first because they stay in contact with continuous moisture from the concrete.
The hatch and the vent
Old villas develop seasonal leaks after large temperature swings between seasons.
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 South Sub-Municipality
The South sub municipality runs from the edge of Old Makkah Road down to Al Khumrah and the southern corniche. Dense residential districts sit beside new subdivisions such as Al Sanabil and Al Taawun, warehouse fringes such as Al Saruriyah and Al Sarawat, and an old seaside settlement at Al Quzayn. Open stormwater channels cross the housing, and the warehouses, the vegetable and livestock markets and the nearby Islamic Port and Industrial City give pests shelter, food and year round humidity. Pressure is greatest in the older quarters, where drainage networks are ageing.
Questions about this district
Why do Al Ajawid tanks corrode faster than tanks elsewhere?
The natural elevation and dry air increase evaporation and thermal expansion. Tanks face larger temperature swings and corrode faster.
Does a small leak mean the whole tank must be sealed or can a patch suffice?
A small isolated leak may be patched. But if other cracks appear or corrosion is widespread, full sealing prevents later problems.
Do villas need different sealing from apartment buildings?
Yes. Villas have smaller tanks and older roofs, and sealing must focus on joints and bases with more precision.
How long does draining, cleaning and sealing the tank take?
Draining, cleaning and repair take 4 to 6 hours. Refilling and sterilisation add further hours depending on tank size.
Does sealing protect against bacteria and fungi in the water?
Sealing prevents dirty water seeping in from outside. Sterilisation after sealing removes contaminants already in the tank.
Are joint cracks between tank walls and floor common here?
Yes, very common. Large temperature swings cause slight tank movement and cracks appear at joints first.
How much does water tank sealing in Al Ajawid 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 Ajawid.
Nearby districts we cover
Other services in Al Ajawid
Other services we provide to residents of Al Ajawid.
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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 Ajawid? Tell us what you saw and we will tell you what it needs
We reach Al Ajawid at a time we agree, and you get the full cost before we start.