Water tank sealing in Kawthar Makkah
Kawthar is a mixed quarter south-east of Al Sharai and outside the Haram boundary, with villas and apartment buildings along Al Qadisiyah Road and several neighbourhood mosques. Kawthar tanks suffer accelerated wear from proximity to Wadi Mudarraja, which carries high moisture and airborne salt, and cracks appear faster than in quarters distant from wadis.
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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 Kawthar
The quarter lies close to Wadi Mudarraja and seasonal moisture and airborne salt directly impact tanks. Older tanks show white salt efflorescence marks and rapid concrete deterioration. The method is set out in full on our Water tank sealing service.
Proximity to Wadi Mudarraja and airborne salt
Wadi Mudarraja to the east carries high moisture and salt becomes airborne. Outer tank walls erode fast and salt causes rebar corrosion and rapid crack formation.
Villas and apartment blocks on open Al Qadisiyah Road
Al Qadisiyah is open and tanks face direct sun all day. Heat and airborne salt together cause rapid cracks and accelerated deterioration.
Scheme Eleven Park and water drainage
The adjacent park provides higher soil moisture and runoff from lawns increases side-wall hydrostatic pressure. Tanks face continuous moisture stress from the park side.
The character of Kawthar
Mixed district: shops at street level with homes above them
Kawthar is a mixed quarter on an open road near a wadi. Villa tanks need standard sealing but closer follow-up than remote quarters, and apartment tanks face higher side-wall pressure and need base and joint inspection before sealing.
What we read before any material is opened
A mixed quarter south-east of Al Sharai and outside the Haram boundary, with villas and apartments along Al Qadisiyah Road and several mosques including Mansour Faqih, Al Khair and Al Walidayn, Scheme Eleven Park on the west and the channel of Wadi Mudarraja along the east towards Al Mughammas.
Cracking in the wall
Rapid deep cracks appear from airborne salt, high moisture and internal rebar corrosion.
The floor to wall joint
The floor-to-wall joint faces side-wall hydrostatic pressure from park and wadi moisture, and seeps quickly.
The condition of the old lining
Pump outlets and drain pipes in tank walls leak because salt oxidises seals and metals.
Sediment and scale
Seasonal moisture and airborne salt cause deposits and mould to accumulate faster.
The pipe entries
The concrete floor erodes fast from salt, acidic water and dissolved salts in groundwater.
The hatch and the vent
Algae, mould and bacteria grow rapidly in the hot salty humid 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 Al Sharai Sub-Municipality
Al Sharai is the eastern growth front of Makkah along King Faisal Road and the Taif road. Settled quarters sit beside recently renamed schemes where plots are still vacant and buildings are going up, so construction sites, fill and open excavations lie next to occupied homes. Wadi channels such as Wadi Mudarraja, Wadi Al Sharai and Wadi Al Mughammas carry flash floods after rain and dry out to damp silt, while dust blows off the open hills. Roadside shops, restaurants and warehouses line the Taif road, and to the east the area shades into villages, palm farms and springs.
Questions about this district
Does airborne salt from the wadi speed up tank erosion?
Yes very much. Salt causes rebar corrosion and concrete erodes fast. Cracks appear and widen faster than in quarters away from wadis.
Do Kawthar tanks need more sealing than tanks in other quarters?
Yes, the environment is salty and hot. Lining lasts less time and resealing may be needed sooner.
Does park-side moisture cause floor leaks?
Yes, side-wall hydrostatic moisture presses on tank walls and the lower joint seeps.
Does water from Wadi Mudarraja pollute the tanks?
The wadi carries water only seasonally. But salt and airborne moisture directly stress the concrete structure.
Should tanks be replaced instead of sealed in this area?
If cracks are surface-level, sealing is enough. If erosion is deep and rebar corrosion visible, replacement is better.
Does salty environment affect sealing and sterilisation speed?
Yes, lining lasts shorter in salty air. Sterilisation needs more frequent repeating because salt encourages rapid regrowth.
How much does water tank sealing in Kawthar 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 Kawthar.
Other services in Kawthar
Other services we provide to residents of Kawthar.
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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 Kawthar? Tell us what you saw and we will tell you what it needs
We reach Kawthar at a time we agree, and you get the full cost before we start.