Water tank waterproofing for duplexes in Sharurah

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

Why water tank waterproofing differs in Sharurah

Team note on Sharurah: Kashf teams serve this city and its nearby districts with the same documented inspection standard: device-based leak detection without demolition, a written report, and a clear scope before any work begins.. Main roads in or near Sharurah: King Abdulaziz Road, King Fahd Road.

The centre of Sharurah sits about 724 m above sea level (SRTM open elevation data).

Do I really need to waterproof my water tank if the duplex already has a roof membrane? Many owners in Sharurah assume the roof work covers the tank, but a tank holds water on its own, and leaks inside it show up as damp walls, lower water levels and musty smells in the rooms below. The centre of Sharurah sits about 724 m above sea level (SRTM open elevation data), which places the town on a high plateau where daily heat swings are strong and the tank is exposed to wide temperature changes. Tank internal coating is priced at SAR 25–60 per m², while liquid roof waterproofing runs SAR 8–25 per m², so the two jobs are separate line items and should be quoted separately.

The inspection starts with the tank itself, not the roof. The technician checks the inner walls and floor for hairline cracks, flaking old paint and signs of past repairs, and notes any place where the surface is soft or stained. Where cracks are active, crack injection is quoted per metre at SAR 40–120 per m, so the length of each crack is measured and marked. The tank lid, inlet pipe and outlet fittings are checked next, since leaks often start where pipes enter the tank. The technician then tests the surface for moisture and records the condition in writing, so you can compare options before any work begins. Epoxy coating is quoted at SAR 35–90 per m² and spray foam at SAR 20–45 per m², and the inspection result decides which one suits the surface.

Before the visit, empty the tank as far as practical so the inner walls are fully visible, and let the technician in to see the lid and the pipe connections from above. Note when you first noticed damp patches, dripping sounds or drops in water level, because timing helps the technician judge whether a crack is new or old. Clear the space around the tank so the crew can set up without moving furniture or stored items. Have your duplex ownership or tenancy details ready, and tell the technician which side of the building is shared with a neighbour, since a leak can travel into the adjoining unit. Keeping these details at hand makes the inspection faster and the written findings more useful.

In a duplex, the two floors often share lines, so tests are done floor by floor.

When do you need water tank waterproofing?

If you notice one of these signs in Sharurah, it is a good moment to talk to the team:

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

Where the problem usually comes from

• Construction joints — we check this before anything else.
• Cracks in the walls or floor — we check this before anything else.
• Damaged old coating — we check this before anything else.

Tools we use in Sharurah

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.

Quick comparison: facts and costs in Sharurah

Short answers for Sharurah

Common mistakes we see

• Using a material that is not intended for drinking water

What you receive

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.