Water tank sealing in Al Nahdah Jeddah
Al Nahdah is a mixed district blending residential blocks and villas in its inner streets with dense retail, clinics and eateries along Hira Street. Tanks here face high water pressure from the main network and proximity to the main road means tanks endure daily vibration stress. Cracks at floor-to-wall joints are common due to minor soil settlement beneath building foundations.
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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 Nahdah
Buildings here range from fifteen to thirty years old and their rooftop tanks show visible cement erosion and leaking around pipe entries and joints. The method is set out in full on the full Water tank sealing page.
Tanks on mid-rise apartment blocks
Apartment buildings in Al Nahdah install medium-sized rooftop tanks serving multiple floors with heavy water loads. Cracks appear first in corners where floor meets wall, and moisture seeps through these joints.
Pipe entries and exits are poorly sealed
Supply and outlet pipes run directly through tank walls and floors with weak original seals. Water leaks around entry points and weakens the cement around the openings.
High water pressure and minor soil movement
The main street is close by and buildings experience vibration from heavy traffic. Minor soil movement creates stress in tanks and causes cement to crack faster than in quieter areas.
The character of Al Nahdah
Mixed district: shops at street level with homes above them
Al Nahdah is a mixed quarter with dense apartment blocks alongside villas, and tanks are positioned on building roofs at large volumes. Repair must account for heavy water pressure in tall buildings and structural movement under constant load.
What we read before any material is opened
A mixed residential and commercial district in northern Jeddah between King Abdulaziz Road and Prince Sultan Road along Hira Street, near the sea, with villas, apartment blocks, shops and Al Nahdah Park.
Cracking in the wall
Inspection of fine cracks around entry and exit joints reveals early leaks before they spread.
The floor to wall joint
Assessment of cement erosion and salt deposits on the floor determines whether the floor needs full removal or targeted repair.
The condition of the old lining
Checking joint quality between walls and floor in all four corners reveals the core structural weakness.
Sediment and scale
Measuring the thickness and adhesion of old coating to underlying cement determines whether full removal is needed.
The pipe entries
Verifying water leaks from entries and pipes after refilling confirms the new joints are sound.
The hatch and the vent
Checking pH, colour and smell after sterilisation ensures water is safe and bacteria-free.
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 Obhur Sub-Municipality
Obhur sub-municipality runs along Jeddah's northern shoreline from Al Shati up to Obhur Creek. It mixes large villas and gated compounds with busy commercial spines of restaurants, cafes, markets and hotels. Sea humidity is high for most of the year and salt laden breezes keep timber and render damp, while irrigated gardens and lawns surround the corniche and the villa plots. Standing irrigation water, dense planting and food waste from the hospitality strip suit cockroaches, mosquitoes and ants, and the chalets and rest houses scattered along the creek stand empty for long spells, which lets insects and rodents settle undisturbed.
Questions about this district
Why do cracks appear so quickly around joints in Al Nahdah tanks?
Tanks here face high water pressure and minor soil movement from street vibrations. The original joints were not built to withstand this combined pressure and movement.
Are tank problems here different from quieter quarters?
Yes. Tanks here leak faster because pressure is higher and vibrations are more frequent. The tall building structures amplify the problem.
What causes cement erosion to accelerate in these tanks?
Water itself contains minerals that cause natural erosion, but vibrations speed up the process significantly.
Are old tanks here safe to drink from after repair?
Yes. After full repair, sterilisation and disinfection, the tank returns to full safe use.
Does leaking around an entry point mean the whole tank has failed?
No. The leak may be localised to that joint only. If the rest of the tank walls are sound, repair can be targeted.
How do we know if the tank floor is weak or if the problem is just the joints?
We inspect the entire floor for cracks and salt deposits. If the floor is sound and the problem is localised, we focus on joint and entry repair.
How much does water tank sealing in Al Nahdah 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 Nahdah.
Nearby districts we cover
Other services in Al Nahdah
Other services we provide to residents of Al Nahdah.
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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 Nahdah? Tell us what you saw and we will tell you what it needs
We reach Al Nahdah at a time we agree, and you get the full cost before we start.