Water tank waterproofing in Al Qaws, Jeddah

Al Qaws is a mixed district in east Jeddah that sits along the course of Wadi Al Qaws, which was the main source of Jeddah's 2009 flood. The district combines shops and flats, and tanks face high humidity from the wadi plus pressure from both commercial and residential water use. The water needs protection from moisture and contaminants the wadi brings.

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Interior surfaces fully sealed
Food-safe coating materials
Cracks and gaps filled first
Inspected before handover

Why tank waterproofing protects your water supply

The district lies along a major wadi course within the hills and valleys belt east of Jeddah. Proximity to Mareekh Mountains means sustained high humidity and dust blown from the heights.

Seal before a leak develops

In Al Qaws, leaks come from sustained wadi moisture and uneven pressure from shops and flats combined. Waterproofing stops moisture entry and blocks algae and bacteria growth.
Repair an existing slow drip

Algae grows rapidly in Al Qaws tanks because high sustained humidity and dust from nearby hills create ideal conditions.
Keep drinking water free of debris

Thermal expansion causes repeated cracking, and high moisture accelerates corrosion from these cracks.
Reduce maintenance over time

Resealing a tank protects the building investment from future moisture and flood damage.

Everything included in the service

Tank drained of water
Walls scrubbed with brush
Surfaces dried before coating
Cracks and gaps sealed
Primer coat brushed on
Waterproofing coat brushed on
Second coat applied over first
Coating inspected before leaving

How the waterproofing job is carried out

Booking and access arrangement
Draining, cleaning, and drying
Sealing and coating
Inspection and handover

What changes about water tank waterproofing in Al Qaws

Tanks on wadi courses experience higher moisture levels than ordinary districts, especially after winter rains when dried mud becomes fine powder. For the whole method, see how we approach water tank waterproofing.

The first reason
Wadi moisture penetrates and blocks pores deeply

Wadi Al Qaws brings very high humidity into the district, especially at night and during damp seasons. This moisture penetrates cracks and keeps the interior damp, creating conditions for rapid bacterial and algal growth.
The second reason
Shops and flats stress a shared tank unevenly

Mixed use consumption from shops below and flats above creates uneven pressure on the tank. This stress causes existing cracks to widen and deepen, especially cracks weakened by moisture and prior pressure cycles.
The third reason
Dried wadi mud becomes powder blocking pores

When the wadi floods, mud covers ground around the tank and enters through openings. When the mud dries, it becomes fine powder that seals pores with a tight seal that holds moisture.

The character of Al Qaws

Mixed district: shops at street level with homes above them

In a mixed district, this means the tank supplies water to shops and flats at once. Wadi moisture and uneven mixed pressure cause faster wear, so waterproofing must be robust and durable across many years.

What the tank looks like after

A sealed, smooth interior surface

The coating bonds to the concrete or fibreglass and fills any hairline cracks that were present.

No active leaks or seeping

Gaps that were allowing water to seep through the walls or base are filled and covered.

Food-safe lining throughout

Every applied material is rated safe for contact with drinking water.

What our customers said

«شغلهم ما شاء الله، أنصح الجميع بالتعامل معهم. عن تجربة وثقة.»

Hesham ZayanAugust 2026 · Review on Google Maps

«أفضل شركة تنظيف بالبخار. أسعارهم ممتازة وشغلهم مرة كويس.»

Bashar Al-MushaikhiJuly 2026 · Review on Google Maps

«خدمة ممتازة.»

Abdullah Al-GhamdiAugust 2026 · Review on Google Maps

«ممتازين.»

Muhammad EshraJuly 2026 · Review on Google Maps

Read the reviews on Google

Some of our work

Illustrative photographs. Our own job photographs go here as soon as the client approves them.

Landmarks of Al Qaws

Al Qaws sits alongside Wadi Al Qaws with Mareekh Mountains nearby. These landmarks make the location straightforward to pinpoint in the area. The team reaches tanks via these reference points and knows the main and minor routes through the district.

Wadi Al Qaws
Mareekh Mountains
Umm Al Salm Sub-Municipality

Nearby districts we cover

Al Harazat Al Hafnah Mareekh

Questions worth asking first

Does wadi moisture actually enter the tank directly?

Moisture does not enter as standing water but penetrates cracks and pores. At night and during damp seasons, moisture enters rapidly and maintains a damp environment inside the tank.

Does the mud from the 2009 flood still affect today's tanks?

The flood damaged foundations and roofs, but direct damage to tanks from that event ended years ago. However, tanks may harbour unrepaired damage, and waterproofing protects against future floods.

Is Al Qaws more flood prone than other districts?

Yes, it sits on the main wadi course. Winter rains bring substantial water into the district, raising ground moisture around the tank significantly.

Does wadi moisture alone make the drinking water unsafe?

Moisture alone does not make water unsafe, but it promotes algae and bacterial growth that change colour, taste and smell.

Does waterproofing protect the tank from high groundwater?

Waterproofing protects from moisture entering and exiting through cracks. In cases of very high groundwater, additional waterproofing below the tank may be needed.

Does commercial consumption pressure speed seepage in Al Qaws tanks?

Yes, uneven commercial pressure causes repeated stress on tank walls. This deepens existing cracks and visibly speeds leakage.

How much does water tank waterproofing in Al Qaws cost?

It is set after we see the job, because the price follows the kind of work, the size of the space, its condition and the time and materials it needs. Send a photo and a short description on WhatsApp and we will give you an estimate before we reach Al Qaws.