Water tank sealing in Al Zahra Jeddah
Al Zahra is a mixed quarter containing modern villas and tall apartment blocks alongside major hospitals. Tanks here suffer from coastal humidity and cracks caused by temperature swings between sea and inland air. Sealing and lining protect water from contamination, leakage and corrosion in both older and newer buildings.
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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 Zahra
Buildings range from villas built in the 1980s to modern apartment blocks, and tanks are exposed to salt and moisture effects from sea proximity. The method is set out in full on our Water tank sealing service.
Coastal humidity damage to tanks
Al Zahra is close to the corniche and sea, and high humidity causes concrete erosion and rust on interior surfaces. Cracks appear quickly in unsealed tanks.
Old villas and their weak tanks
Villas built 30 years ago have tanks without modern lining. Foundations and walls retain old moisture and leaks are common.
Hospitals and commercial buildings need high sanitary standards
Al Zahra hosts major hospitals and clinics requiring clean safe water. Tanks here must be sealed and free of chemical and bacterial contamination.
The character of Al Zahra
Mixed district: shops at street level with homes above them
Al Zahra is a mixed quarter with old villas and modern buildings, and tanks vary in size, depth and location. Sealing an old villa tank requires a different approach than a modern apartment building tank, especially if the tank is underground or in hard-to-reach areas.
What we read before any material is opened
A mixed district in north-western Jeddah between King Abdulaziz Road and Hira Street, near the corniche, bordered by Al Salamah, Al Nahdah, Al Khalidiyah and Al Shati.
Cracking in the wall
Interior concrete erodes from salt, coastal humidity and oxidation, with cracks appearing on walls and floors.
The floor to wall joint
Floor-to-wall joints leak moisture through them because they lack original sealing in old villas and older buildings.
The condition of the old lining
Pipe entries and exits in villas and buildings provide pathways for soil and salt to enter if not sealed.
Sediment and scale
Moisture from the sea and humid air causes algae and bacteria growth inside tanks, especially in lower layers.
The pipe entries
Slow leaks cause water pooling beneath tanks in villas and buildings, weakening surrounding foundations and walls.
The hatch and the vent
Contaminated water causes poor smell, taste and cloudy colour, indicating organic matter and salt ingress from outside.
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 New Jeddah Sub-Municipality
New Jeddah sub-municipality lies at the heart of the northern city near the corniche and takes in Al Rawdah, Al Salamah, Al Zahra and Al Khalidiyah. These are established upmarket districts of villas, compounds and modern apartment blocks, crossed by Prince Sultan Road and Tahlia Street with their restaurants and hotels. The nearby sea keeps humidity high for most of the year and irrigated gardens hold moisture in the soil. Food waste and damp planted areas draw cockroaches, ants and mosquitoes, and in packed apartment blocks pests move between units through shared service shafts and refuse rooms.
Questions about this district
Why do Al Zahra tanks leak more than in other quarters?
Sea proximity, high humidity and salt accelerate concrete decay. Small cracks quickly become leakage paths.
Does lining alone stop current leaks?
No, cracks and joints must be repaired first. Lining protects against new leaks but does not fix old cracks.
Do old villa tanks need different treatment than apartment building tanks?
Yes, old villas have underground or rooftop tanks with no original sealing. Newer buildings may have only partial repair history.
How often does sealing and lining need to be redone?
After proper repair and full lining, sealing lasts many years depending on material quality and surrounding humidity.
Do hospitals need different treatment?
Yes, hospitals require higher sterilisation standards and precision work on pipe joints and filter connections.
Does internal wall rust mean the whole seal has failed?
It may mean small cracks allowed water into steel layers. Rust removal and reapplication are necessary.
How much does water tank sealing in Al Zahra 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 Zahra.
Nearby districts we cover
Other services in Al Zahra
Other services we provide to residents of Al Zahra.
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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 Zahra? Tell us what you saw and we will tell you what it needs
We reach Al Zahra at a time we agree, and you get the full cost before we start.