Water tank waterproofing in Alula: cost & published offers

Prepared by the technical team · editorial review · last updated 13 November 2026 · Sources

Water tank waterproofing in Alula: the local context

The centre of Alula sits about 697 m above sea level (SRTM open elevation data). Main roads in or near Alula: King Abdullah Road.

Picture a homeowner in Alula whose rooftop water tank has started to leak. The tank sits above the bathrooms, and a damp patch has appeared on the ceiling below. Like many owners in this type of property, they want to know what the repair will cost before anyone starts work, and they want the job done once rather than patched every season. Their first question is usually simple: what does tank waterproofing cost here, and what do the published offers actually cover?

Alula sits at the centre of the local area about 697 m above sea level (SRTM open elevation data), which means the town is high and dry, but rooftop tanks still face sun, wind and temperature swings that stress coatings over time. For this owner, the elevation matters less than the surfaces themselves. Tank internal coating is published at SAR 25–60 per m², while liquid roof waterproofing is listed at SAR 8–25 per m² and bitumen membrane at SAR 15–35 per m². Because a tank can be treated from inside, outside, or as part of the roof, the scope decides which line applies. Crack injection, priced at SAR 40–120 per metre, is a separate item and only applies where a crack is found. These are the figures to compare, not a single headline price.

Start by confirming where the water is actually coming from. Check the tank walls, the base, and the joints, and note whether leaks are at the tank or at the roof slab beneath it. Next, measure the wet areas in square metres and list any cracks by length in metres, so each quote can be checked against the same unit. Then ask each contractor to price the work separately: internal tank coating, roof waterproofing, and crack injection, with the rate per unit shown. Compare the stated ranges against the published bands above, and ask what would move a job toward the top or bottom of its range. Finally, agree the surface preparation, the number of coats, and the drying time in writing before work begins, so the finished tank is clearly defined.

Prices shown on this page come from our own published price list for the city; the final price is set after inspection.

Signs that call for water tank waterproofing

The following signs are worth checking before they grow:

• A tank that leaks after testing
• Deposits and flaking inside the tank
• Unusual colour or taste in the water

Causes we see in the field

• A common cause: damaged old coating.
• Cracks in the walls or floor — we check this before anything else.
• A common cause: construction joints.

Tools we use in Alula

The steps in order

1. Emptying and ventilation: The tank is emptied and ventilated before entry.
2. Cleaning and preparation: Loose material is removed down to a sound surface.
3. Crack treatment: Active cracks are treated first.
4. Coating layers: A material intended for drinking-water tanks is applied.
5. Disinfection and fill test: The tank is disinfected and the level is monitored after filling.

Alula in facts and sources

Common questions about water tank waterproofing in Alula

Common mistakes we see

• Using a material that is not intended for drinking water

The written outputs

The written output: the material name, its batch number and the fill-test result. The report is numbered and can be checked with its verification code.