Water tank sealing in Yamamah Makkah
Yamamah is a mixed-use quarter north of Al Sharai with villas and apartment buildings scattered among empty plots. The buildings are relatively young but built on variable sandy and stony soil. Tanks show early cracking due to ground movement. Sealing work here takes longer because foundations are not fully settled.
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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 Yamamah
Buildings in Yamamah are relatively new but foundations rest on unstable soil. Tanks show cracks in their first or second year. The method is set out in full on our Water tank sealing service.
Foundations on sandy and gravelly soil
Yamamah soil is sandy mixed with gravel and small stones. Seasonal ground movement causes minor settlement but enough to crack tanks and pipe joints.
Concrete tanks newly built
Most tanks were built in the last decade and concrete is still curing. Shrinkage cracks appear quickly, especially at corners and around pipe entries.
Direct exposure to weather on rooftops
Tanks are often placed exposed on flat roofs. Daily expansion and contraction from heat accelerates cracking, especially in summer months.
The character of Yamamah
Mixed district: shops at street level with homes above them
Yamamah is a mixed-use quarter of villas and apartments on unstable soil. Tanks here need careful inspection of foundation settlement and potential subsidence. Sealing must be flexible enough to tolerate small ground movements.
What we read before any material is opened
A mixed residential quarter north of Al Sharai between King Faisal Road and Al Jaranah Road, with scattered villas and apartment buildings and many vacant plots. The Al Shifa hills border it to the west and Al Qubbah Mosque stands to the east.
Cracking in the wall
Internal surface is sandy and rough because concrete is new. We clean it completely and remove the weak surface layer.
The floor to wall joint
Shrinkage cracks appear at corners and around pipes and horizontal joints. We inspect and map them carefully.
The condition of the old lining
The floor-to-wall joint is a weak point. Ground movement separates concrete there. We repair it with specialist filler.
Sediment and scale
The main pipe entry and branch pipes are potential leak points. We seal them with flexible protective collars.
The pipe entries
Leaks start at corners and fine cracks. The new lining covers all weak areas and existing cracks.
The hatch and the vent
The tank fills slowly on first use to test the new lining. We monitor the surface, joints and repaired 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 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
Why do cracks appear in a new tank in Yamamah?
Soil is unstable and fresh concrete shrinks. Seasonal ground movement and thermal expansion of concrete from heat cause shrinkage cracks.
Are exposed rooftop tanks more prone to cracking?
Yes. Direct sun and wind increase expansion and contraction, and cracks appear faster than in sheltered tanks.
Does sandy soil affect how well sealing holds?
Yes. Sandy soil moves more than clay soil, and minor settlement will crack the sealant faster.
Should we wait two years before sealing a new tank?
No need to wait long, but a short delay reduces ongoing movement. Best to seal after one year when initial foundation settlement has slowed.
How do we handle pipe joints if soil is moving?
We seal pipe joints with flexible material that tolerates movement. We place a protective collar around the pipe at entry.
Will sealing protect against future settlement?
Sealing prevents water loss from cracks, but large future settlement may crack the new lining.
How much does water tank sealing in Yamamah 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 Yamamah.
Other services in Yamamah
Other services we provide to residents of Yamamah.
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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 Yamamah? Tell us what you saw and we will tell you what it needs
We reach Yamamah at a time we agree, and you get the full cost before we start.