Water tank sealing in Al Kandarah Jeddah
Al Kandarah is a busy commercial quarter on King Fahd Road, holding hotels, apartment blocks, old villas and retail shops including the famous Kandarah Souq. Tanks here face constant high daily water demand from hotels, shops and residents, and salty water and dust corrode old linings fast. Sealing restores the tank to safe service after thorough cleaning and repairing cracks and joints.
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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 Kandarah
Commercial buildings and hotels rely on large-capacity tanks, with high daily water consumption that exposes linings to constant pressure and rapid wear. The method is set out in full on Water tank sealing in detail.
Large tanks in hotels and residential apartment blocks
Hotels and residential apartment buildings throughout Al Kandarah hold tanks storing tens of thousands of litres. High daily consumption means the lining faces continuous water pressure and repeated filling and draining cycles.
Salt, dust and humidity corrode linings quickly
Jeddah's water is saline and mineral-rich, and salt and dust penetrate tanks through cracks. High humidity corrodes the tank's outer surface.
Joints and seals weaken in older tanks
Tanks built twenty or more years ago have weak joints between floor and walls and around pipe entries. These are the first to crack, allowing leaks or contaminant entry.
The character of Al Kandarah
Commercial area: offices, showrooms and small stores
Al Kandarah is a mixed commercial quarter with hotels, apartment blocks and old villas. Tanks here vary widely in size and use, from small residential tanks to massive hotel and commercial installations. Treatment depends on tank size and construction materials, and may require coordination with hotels for temporary service shutdowns.
What we read before any material is opened
A mixed commercial quarter in south Jeddah on King Fahd Road, containing hotels, apartment buildings, old villas and shops, with the Kandarah Souq, Jeddah National Hospital, and busy retail runs along Old Makkah Road and King Khalid Road.
Cracking in the wall
Surface corrosion starts where water hits the floor hard, especially beneath main pipe inlets.
The floor to wall joint
Major cracks appear along floor-to-wall joints and around pipe entries and overflow points.
The condition of the old lining
Contaminants and oxygen enter through weak cracks, joints and gaps around pipe sleeves.
Sediment and scale
Salt and moisture concentrate on the tank's outer surface, especially if it sits in a damp space or open air.
The pipe entries
Ground settlement beneath the tank may cause structural movement and joint failure.
The hatch and the vent
Algae and bacteria grow in cracks and joints where light and oxygen penetrate, accelerating chemical corrosion.
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 Balad Sub-Municipality
Al Balad sub municipality covers the historic core of Jeddah and the districts that first grew outside its wall. Its building stock is the oldest in the city: heritage stone houses and apartment blocks from past decades, threaded with hotels, shops and crowded popular markets around Bab Makkah, Bab Sharif and the Kandarah Souq. Nearness to the sea, the Islamic Port and the Arbaeen lagoon keeps humidity high all year, water and drainage networks are old, and narrow lanes, dense eateries and commercial storerooms put food and shelter within reach at every corner.
Questions about this district
Why do tank linings corrode so fast in Al Kandarah?
Salty water, dust and high consumption accelerate wear. Continuous water pressure and repeated filling cycles stress the lining constantly.
Are small cracks in a tank dangerous?
Yes. Small cracks allow water loss and contaminant entry, plus oxygen ingress which speeds corrosion. Left unrepaired, they widen fast.
What determines the cost of tank sealing?
Tank size and internal surface area to be covered, plus the number of cracks and joints needing repair. Large hotel tanks cost more than residential apartment tanks.
Is tank sealing safe for drinking water?
Yes. Materials used meet standards for drinking water contact. After sealing and sterilisation, the tank is fully safe.
Do hotels and shops need different treatment from residential villas?
Yes. Commercial tanks are much larger and consumption far higher. They may also need stricter maintenance schedules and more frequent inspection.
How often should a tank be inspected after sealing?
At least once a year. Commercial and hotel tanks may need inspection every six months if consumption is very high.
How much does water tank sealing in Al Kandarah 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 Kandarah.
Nearby districts we cover
Other services in Al Kandarah
Other services we provide to residents of Al Kandarah.
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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 Kandarah? Tell us what you saw and we will tell you what it needs
We reach Al Kandarah at a time we agree, and you get the full cost before we start.