Water tank waterproofing for schools in Muhayil Aseer

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

Water tank waterproofing in Muhayil Aseer: the local context

The centre of Muhayil Aseer sits about 455 m above sea level (SRTM open elevation data). Main roads in or near Muhayil Aseer: King Faisal Road, King Abdulaziz Road.

Team note on Muhayil Aseer: 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..

The centre of Muhayil Aseer sits about 455 m above sea level, and that height shapes how a school water tank is assessed before any coating is chosen. Because the town is set on higher ground in the Aseer region, the first checks focus on the tank walls, the base, and the joints where water can enter or leave. Technicians look for existing cracks, flaking old paint, and any signs of past leaks, since these determine whether a tank needs a full internal coating at roughly SAR 25–60 per m² or only localised repair. Crack injection, priced at SAR 40–120 per metre, is often considered first where the damage is limited to a few linear faults.

Some decisions cannot be made from a description alone and are left to the site visit. The technician must measure the tank's internal surface area, confirm the condition of the concrete, and check whether the water supply has been drained and cleaned safely before work begins. The choice between epoxy coating at SAR 35–90 per m² and spray foam at SAR 20–45 per m² depends on what the surface feels like under inspection, how much moisture is present, and whether the tank is accessible from inside. Only a visit can confirm whether a school's tank room needs any separate attention to the roof area, where liquid roof waterproofing at SAR 8–25 per m² or a bitumen membrane at SAR 15–35 per m² may be relevant.

For the technician, the most useful preparation is a clear record of the tank's dimensions, its age, the material it is built from, and any previous repairs carried out by the school. Note whether the tank is cylindrical or rectangular, whether it sits on the ground or on a roof, and whether XPS boards at SAR 12–30 per m² have ever been used as insulation nearby. Ask the school staff about times of heavy use, since the tank may be drawn down more than expected. Bring the price ranges above as a starting reference, then confirm the final scope on site before quoting.

For schools, the larger jobs are planned for weekends and holidays.

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

• Damaged old coating — we check this before anything else.
• A common cause: cracks in the walls or floor.
• Construction joints.

Tools and methods, and when we use them

From the first visit to the report

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 — Muhayil Aseer

Questions from Muhayil Aseer

Mistakes that cost more

• Using a material that is not intended for drinking water

What you get after the work

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.