Water tank sealing in Kudai Makkah
Kudai is an old commercial quarter on the lower slopes of Jabal Khandamah, home to the Zamzam water bottling plant, hotels and parking facilities. Tanks here face intense direct sun exposure on the hillside, dust from vehicle traffic and seasonal moisture. Sealing and repair must account for thermal cycling and the pressure exerted by hillside seepage on tank walls.
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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 Kudai
Tanks in Kudai experience sharp temperature swings due to slope exposure, and seasonal moisture concentrates in low areas near the car parks. The method is set out in full on Water tank sealing in detail.
Solar heating on the hillside slope
Buildings and tanks in Kudai face direct sun all day on Jabal Khandamah. Rapid thermal expansion and contraction weakens the coating and opens cracks in walls, especially during midday heat.
Dust and debris from parking traffic
Bus and car parks generate heavy dust clouds. This settles on tanks and works into any small cracks, accelerating coating failure and seal breakdown.
Seasonal moisture and seepage from foothill soil
During high humidity periods, water seeps through the ground beneath the slope. Tanks on the incline face water pressure from below, causing leaks at the base and corners.
The character of Kudai
Commercial area: offices, showrooms and small stores
Kudai is a commercial quarter on a slope, so tanks here face thermal and water pressure stresses unlike flat-ground areas. Sealing must account for rapid expansion and soil pressure from beneath the slope.
What we read before any material is opened
A commercial district on the south-eastern slope of the Sacred Mosque zone, containing the Zamzam bottling plant, bus and car parks, hotel towers and residential blocks, bounded by Jabal Khandamah to the north and Ajyad Street to the west.
Cracking in the wall
The floor faces water pressure from damp soil on the slope, with cracks appearing in corners and low-pressure zones.
The floor to wall joint
Pipe entries come through tight points and face vehicle vibration and heat, causing weeps at the joints.
The condition of the old lining
Walls face direct sun and rapid thermal expansion, especially south and east faces on the slope.
Sediment and scale
Moisture from hillside soil and seasonal rain collects in the base and sides, and water pressure rises in winter months.
The pipe entries
Deep cracks start at the floor and spread through walls, especially at corners where pressure is highest.
The hatch and the vent
Metal and pipe fittings corrode quickly in damp slope soil, and rust spreads cracks around pipe entries.
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 Misfalah Sub-Municipality
Al Misfalah sub municipality runs downhill from the south of the Grand Mosque through Al Misfalah, Kudai and Al Rawabi to Al Taqwa, Al Hindawiyah, Al Khalidiyah and Al Rusayfah at the third ring road. The northern end is old apartment blocks and pilgrim hotels with restaurants along Ibrahim Al Khalil Street and the huge coach parks at Kudai. The south and west are dense popular districts with countless small shops and unplanned hillside housing, some of it already cleared for redevelopment, giving way to orderly land grant schemes in Al Rusayfah beside the railway station.
Questions about this district
Does slope exposure and heat cause tank cracks?
Yes. Rapid thermal swings cause concrete to expand and contract quickly, opening fine cracks in walls and floor joints.
Does parking dust affect water quality after sealing?
Yes. Dust enters through cracks and joints. The seal must be very tight, and we may recommend exterior treatment as well.
How do we handle water pressure from hillside soil beneath the tank?
We inspect the floor and corners carefully. If pressure is evident, we add an extra exterior seal layer or improve drainage around the tank base.
Do car park tanks need different treatment than hotel tanks?
They may. Park tanks face more vehicle vibration and dust exposure than hotels, requiring a tougher seal.
How often does a Kudai tank need re-sealing?
It depends on initial crack extent and inspection findings. Slope tanks may need re-sealing every 5 to 7 years due to thermal and water pressure cycling.
Do we treat the soil around the tank as well?
If water pressure is clear, we may recommend improved drainage or an exterior seal layer around the tank base.
How much does water tank sealing in Kudai 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 Kudai.
Nearby districts we cover
Other services in Kudai
Other services we provide to residents of Kudai.
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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 Kudai? Tell us what you saw and we will tell you what it needs
We reach Kudai at a time we agree, and you get the full cost before we start.