Water tank sealing in Al Rawabi Jeddah
Al Rawabi is a mixed south Jeddah district in two parts: a newer northern section crossed by Bin Laden Road and an older southern strip along Old Makkah Road. Dense apartment blocks hold rooftop tanks that leak at cracks and joints from intense heat. Basement tanks face moisture from clayey soil and need special sealing.
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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 Rawabi
Population is dense and buildings are very tightly packed. Each tall apartment block holds a large rooftop tank supplying water to thousands. Daily consumption is very heavy and tanks are under continuous pressure. The method is set out in full on how we approach Water tank sealing.
Rooftop tanks on tall dense apartment blocks
Al Rawabi has very tall apartment blocks, each with a large rooftop tank. Tanks are under severe pressure from many floors of water demand and intense sun heat.
Mix of modern and very old buildings
The northern section is new and the southern very old. Old tanks show more erosion and new tanks are in better condition, but heavy use causes rapid cracking in all.
Basement tanks in wet clayey soil
Soil in Al Rawabi is clayey and wet, especially in winter. Basement tanks face upward water pressure and salt and minerals from the wet ground.
The character of Al Rawabi
Mixed district: shops at street level with homes above them
Very dense tall apartment buildings mean tanks are under severe pressure from water volume and daily use. The mix of old and new structures demands uniform strong sealing that tolerates pressure, heat and moisture together.
What we read before any material is opened
A mixed district in south Jeddah with two sections: a newer northern area on Bin Laden Road and an older southern area on Old Makkah Road. Apartment buildings dominate, with small shopping centres, neighbourhood parks such as Bin Laden Park and several mosques serving dense population.
Cracking in the wall
Fine cracks first appear on the floor and at corners from continuous pressure and heat-driven expansion.
The floor to wall joint
The floor-wall joint is weak from heavy pressure of a full tank on tall buildings.
The condition of the old lining
Inlet, outlet and drain pipes leak from movement and continuous pressure and need reinforced entry seals.
Sediment and scale
Mineral deposits from local water and possibly salt from wet clayey soil coat the floor and walls.
The pipe entries
The original lining is eroded by pressure, heat, moisture and heavy use and needs complete replacement.
The hatch and the vent
Tank leaks from rooftops waste large volumes of water and may cause seepage into flats below.
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 Al Jamiah Sub-Municipality
Al Jamiah sub municipality spans the older south of Jeddah. Planned districts such as Al Fayha, Al Thaghr and Madain Al Fahd sit beside crowded popular quarters like the Nazlahs and Al Quraiyat, and beside cleared or clearing land in Ghulail, Petromin and Al Thaalibah awaiting redevelopment. Apartment buildings stand close together above dense runs of shops and restaurants along Old Makkah Road and Prince Majid Road. Drainage in the popular quarters is ageing, humid air drifts in from the port and refinery side to the west, and the flat low lying ground holds rainwater in narrow streets.
Questions about this district
Why do rooftop tanks on tall buildings leak more than in other areas?
Pressure from many floors cracks the tank quickly. Intense heat and pressure together speed erosion and crack spread.
Does heavy use by large resident populations speed decay?
Yes. Tanks are under continuous pressure from heavy daily consumption. Pressure and use together hasten crack formation.
Do basement tanks in Al Rawabi need different sealing than rooftop ones?
Yes, the wet clayey soil needs special protection. Basement tanks need materials that withstand ground moisture and soil pressure.
Does the mix of old and new buildings affect sealing method?
Yes, old tanks may need deeper cleaning and new building tanks are in better condition. But heavy use creates a common problem across both.
Do shopping centres and shops have separate or shared tanks?
Most shops and centres connect to building tanks serving residential units together. Sealing covers the whole tank since use is mixed.
Do seasonal changes affect sealing quality?
Yes, the temperature swing between winter and summer is very large. Sealing needs materials that tolerate constant expansion and contraction across seasons.
How much does water tank sealing in Al Rawabi 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 Rawabi.
Nearby districts we cover
Other services in Al Rawabi
Other services we provide to residents of Al Rawabi.
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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 Rawabi? Tell us what you saw and we will tell you what it needs
We reach Al Rawabi at a time we agree, and you get the full cost before we start.