Water tank waterproofing for hotels & serviced apartments in Unaizah

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

Why water tank waterproofing differs in Unaizah

The centre of Unaizah sits about 667 m above sea level (SRTM open elevation data). Team note on Unaizah: 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..

A hotel or serviced apartment owner in Unaizah usually has guests who expect steady water pressure and clean supply at all hours. A rooftop or ground-level water tank that leaks slowly can go unnoticed for months, staining ceilings, damaging rooms and quietly raising the cost of running the building. The owner's concern is to keep the tank sound without closing rooms or disrupting check-ins, so the work has to be planned around occupancy as well as the structure.

Unaizah's centre sits about 667 m above sea level, a fact that matters for tank waterproofing because it places the town on higher ground where direct sun and dry air are common. Heat expands and contracts concrete and coatings, which is one reason hairline cracks appear and existing membranes lose their grip. For a property owner this means the tank lining and the roof layer should be inspected on a regular cycle rather than only when a leak appears. Budgeting also helps: tank internal coating typically runs SAR 25–55 per m², liquid roof waterproofing SAR 10–25 per m², and crack injection SAR 40–115 per metre, so early repairs keep the total bill modest.

A practical sequence starts with a full inspection of the tank walls, floor and roof, marking every crack and damp patch. Next, drain and clean the tank, then repair cracks by injection before any surface work. After the substrate is dry and sound, apply the chosen system: a tank internal coating for the interior, and for the roof either liquid waterproofing or a bitumen membrane, which sits at SAR 15–35 per m². Insulating boards such as XPS, priced at SAR 10–30 per m², can be added where heat gain is a concern. Finish by testing the tank with a full fill before refilling for guests, and record the date and areas treated so future inspections start from a clear baseline.

For hotels and serviced apartments, rooms are handled in batches to keep units available.

When do you need water tank waterproofing?

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

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

Where the problem usually comes from

• A common cause: damaged old coating.
• A common cause: cracks in the walls or floor.
• Construction joints.

How we choose the tool in Unaizah

How the work is done, step by step

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.

Facts and costs — Unaizah

Common questions about water tank waterproofing in Unaizah

Mistakes that cost more

• Using a material that is not intended for drinking water

What you get after the work

You receive: the material name, its batch number and the fill-test result, in a technical report with a verification code.