Water tank sealing in Al Harah Al Janubiyah Jeddah
Al Harah Al Janubiyah is an old popular quarter in southern Thuwal where tanks sit on the roofs of aged houses. Wind and dust from the surrounding desert and open ground affect the tank surface directly. Hot water and direct sun rays crack walls and floors quickly here.
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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 Harah Al Janubiyah
Buildings here are old and tanks suffer from cracking and slow leaks due to direct sun exposure and intense heat on the roof. The method is set out in full on what Water tank sealing involves.
Tanks on high roofs exposed to full sun
Tanks here sit on the roofs of old residential houses facing sun throughout the day. Intense heat causes constant expansion and contraction, and cracks appear within the first or second year of installation.
Empty land and dust surrounding the quarter
The quarter is bordered on its outer edges by empty ground and farmland. Wind carries dust, sand and salt deposits that settle on the tank surface and mix with seeping water through cracks.
Salt water and high salinity in the soil
Thuwal is a coastal town and salinity is high in air, water and soil. Salts accumulate on the tank exterior and accelerate corrosion of the protective coating.
The character of Al Harah Al Janubiyah
Mixed district: shops at street level with homes above them
The quarter is a mix of old popular building and modern residential blocks, with tanks varying between old concrete and newer metal types. Sealing must adapt to building type, material and tank age, and the density of rooftop tanks means the problem is widespread across the quarter.
What we read before any material is opened
A popular residential quarter in southern Thuwal on the Red Sea coast, with inner streets populated by residents and outer edges overlooking empty land and farmland, extending south towards Dhahban and the outskirts beyond Jeddah.
Cracking in the wall
Cracks and gaps typically occur at tank corners and floor-to-wall joints where pressure is greatest and expansion most pronounced.
The floor to wall joint
Water leaks appear from the tank base or at pipe entries because internal pressure forces water through fine cracks.
The condition of the old lining
Pipe entry points, fasteners and fixtures provide weak points for leaks if seals are not tight.
Sediment and scale
Condensation moisture settles on inner and outer walls as heat and cool cycles alternate daily.
The pipe entries
The tank floor and the floor-to-wall joint bear constant water pressure and slight movement from expansion and contraction cycles.
The hatch and the vent
Old protective coating and cracked paint no longer shield the tank from salt, dust and contaminants entering through fine cracks.
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 Al Harah Al Janubiyah crack faster than elsewhere?
Sun strikes the tank directly all day and intense heat causes repeated expansion cycles. Salinity and desert dust accelerate deterioration.
Do small cracks need full sealing or simple repair?
Small cracks seem insignificant but widen quickly in hot climate and salt spray. Full sealing prevents leaks from future expansion cycles.
Does a newly sealed tank need regular maintenance?
Yes, inspect the tank annually especially before intense summer heat. Salinity and heat require periodic checks.
Can the tank be sealed without complete drainage?
No. Sealing requires full cleaning of inner and outer surfaces and removal of old coatings. The tank must be completely empty.
Does an old concrete tank differ from a metal one?
Yes. Concrete tanks in this area need crack repair at the base first. Metal ones need wire brushing and rust removal beforehand.
How long does sealing take from start to finish?
Complete sealing takes three to four days depending on tank size. Cleaning and crack repair take the first two days.
How much does water tank sealing in Al Harah Al Janubiyah 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 Harah Al Janubiyah.
Nearby districts we cover
Other services in Al Harah Al Janubiyah
Other services we provide to residents of Al Harah Al Janubiyah.
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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 Harah Al Janubiyah? Tell us what you saw and we will tell you what it needs
We reach Al Harah Al Janubiyah at a time we agree, and you get the full cost before we start.