Water tank waterproofing in Najran: cost & published offers

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

Water tank waterproofing in Najran: the local context

Team note on Najran: 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 Najran sits about 1309 m above sea level (SRTM open elevation data).

Main roads in or near Najran: Al Jarba Street.

Is it worth paying for water tank waterproofing in Najran, and what will it actually cost? Najran sits at roughly 1309 m above sea level, and the published offers for tank work reflect the materials and labour involved rather than the altitude itself. For tank internal coating, the published range is SAR 25–60 per m², and an epoxy coating is listed at SAR 35–90 per m². Spray foam, which is sometimes used on tank surfaces, is SAR 20–45 per m². Because the final figure depends on the surface area and the system chosen, the most useful step is a site visit before any work is agreed, not a single number applied to every tank.

The inspection usually starts with measuring the tank's internal and external surface area, since every rate above is charged per square metre. The technician then checks for visible cracks, because crack injection is quoted separately at SAR 40–120 per metre, and any repair of this kind adds to the total. Joints, corners and the roof area are noted, along with the condition of the existing coating if one is present. Where the tank sits on or against a structure, the inspector may also look at adjoining surfaces. Once the condition is recorded, the options can be compared line by line against the published rates, so the owner sees exactly which items are included and which are optional.

Before the visit, gather basic information that will speed up the quote: the tank's dimensions or capacity, the material it is made from, and any history of leaks, staining or repairs. Note the date of the last cleaning and whether the tank has been drained recently, since access to a dry, clean surface makes the inspection more accurate. Clear the area around the tank and make sure someone who can grant access is present. Keeping a short written list of the problems you have noticed, such as damp patches or a change in water taste, will help the inspector focus on the right areas. A prepared owner gets a clearer comparison of the published offers and a quote that reflects the real condition of the tank.

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

Signs worth paying attention to

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

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

The most common causes

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

How we choose the tool in Najran

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.

Quick comparison: facts and costs in Najran

Questions from Najran

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.