Water tank sealing in Harat Al Zanabiqah Jeddah
Harat Al Zanabiqah is a residential quarter on the north edge of Thuwal town directly beside the King Abdullah University of Science and Technology campus and the shoreline. Houses here are relatively modern but exposed to high coastal moisture and direct salt winds. Tanks face special challenges from salt, moisture and beach proximity.
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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 Harat Al Zanabiqah
Houses are relatively modern in build and tanks sit in direct exposure to salt-laden sea winds and permanently high humidity. The method is set out in full on the full Water tank sealing page.
Direct sea salt and strong coastal winds
The quarter faces the sea directly and winds carry salt spray onto tanks year-round. Salt deposits rapidly and penetrates any weak sealant.
Modern houses and contemporary tanks
Houses are modern and tanks are modern concrete, but thickness and quality are medium-grade. Thermal expansion from the temperature swing between coast and plateau causes rapid cracking.
Constant salt moisture and beach proximity
Humidity never drops below 70 percent and sea salt reacts with concrete continuously. The close shoreline means groundwater is very high and foundations face moisture attack from below.
The character of Harat Al Zanabiqah
Coastal area: high humidity and salt air through the year
A modern coastal quarter means tanks are modern but face extremely severe environmental pressure from salt and permanent moisture. Sealant must use high-quality salt and moisture-resistant materials and inspection and maintenance must be very frequent.
What we read before any material is opened
A coastal residential quarter on the northern edge of Thuwal, bounded by the King Abdullah University of Science and Technology fence on one side and the seafront and corniche on the other.
Cracking in the wall
Salt deposits and mould on the outer surface show direct sea salt attack and constant dampness.
The floor to wall joint
Checking sealant peeling and cracks from constant salt and moisture shows surface degradation.
The condition of the old lining
Testing for water leaks from floor or sides reveals groundwater affecting the foundation.
Sediment and scale
Inspecting concrete quality and sub-surface crumbling from chemical salt reaction indicates deep damage.
The pipe entries
Checking joints, openings and inlet pipes ensures no groundwater entry.
The hatch and the vent
Observing pH levels and corrosion on metals indicates an extremely aggressive coastal environment.
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 Thuwal Sub-Municipality
Thuwal sub municipality is a small fishing town on the Red Sea coast at the far northern edge of Jeddah governorate. Its old quarters are closely packed popular and mud built houses on narrow streets, with newer low rise concrete homes from the town's development programme beside them. Sea humidity stays high all year, the fishing harbour and the corniche form its seafront, water arrives by tanker so household tanks are everywhere, and the town sits on Wadi Thuwal, ringed by open ground and by the irrigated green campus of King Abdullah University of Science and Technology.
Questions about this district
Why do tanks in Harat Al Zanabiqah need stronger sealing than other areas?
Direct sea salt and constant moisture attack from outside and inside together. Beach proximity means high groundwater.
Does proximity to the university and shore affect sealant choice?
Yes. We choose sealants highly resistant to salt and extreme moisture. Standard sealants fail in under two years.
How long does new sealant last in this difficult coastal location?
High-quality sealant may last 4-5 years. But inspection every six months is absolutely necessary.
Does high groundwater affect the tank floor?
Yes greatly. Moisture from below penetrates tank floor and foundation. A very strong floor seal is needed.
Can we seal the tank without strengthening the groundwater foundation?
We may need to strengthen the foundation first if it is attacked by groundwater. A weak foundation destroys any surface seal.
What is a safe distance between the tank and beach or groundwater?
There is no completely safe distance. We focus on very strong sealant and good drainage around the tank.
How much does water tank sealing in Harat Al Zanabiqah 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 Harat Al Zanabiqah.
Nearby districts we cover
Other services in Harat Al Zanabiqah
Other services we provide to residents of Harat Al Zanabiqah.
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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 Harat Al Zanabiqah? Tell us what you saw and we will tell you what it needs
We reach Harat Al Zanabiqah at a time we agree, and you get the full cost before we start.