Water tank waterproofing for rest houses & farms in Alqurayyat

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

Before we start: what we know about Alqurayyat

Team note on Alqurayyat: 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 Alqurayyat sits about 497 m above sea level (SRTM open elevation data).

Alqurayyat sits in the north of the Kingdom, and the centre of the town is about 497 m above sea level (SRTM open elevation data). For rest houses and farms, that elevation matters. Sites at this height are often exposed to open ground, dust, and wide temperature swings between day and night, so a tank that is installed in the open can see heavy thermal stress on its surfaces. Good waterproofing for these sites has to bond well to the substrate and remain flexible enough to move with the tank as it heats and cools.

Because the work is priced per square metre and per metre of crack, owners can plan a job with clear figures in mind. Tank internal coating typically falls between SAR 25 and SAR 60 per m², while liquid roof waterproofing on a rest house or farm building runs from SAR 8 to SAR 25 per m². Crack injection is charged per metre, at SAR 40 to SAR 120 per m, so an accurate survey of the length of cracking before work starts helps keep the quote realistic. Spray foam at SAR 20 to SAR 45 per m² and XPS boards at SAR 12 to SAR 30 per m² are other options a contractor may suggest, depending on how the tank and its surroundings are built.

Owners in Alqurayyat tend to avoid a few common mistakes. The first is coating a tank without first repairing and cleaning the cracks, which lets moisture travel behind the new layer. The second is choosing a membrane purely on price without checking whether it suits the tank material and the exposed sun. The third is skipping inspection of the tank's internal surfaces, so that residue or loose old coating is left in place. Finally, many owners wait until leaks appear inside a rest house before acting, when earlier attention would have cost less and protected the water supply.

Rest houses and farms often have long buried lines, tanks and irrigation that need separate tests.

When do you need water tank waterproofing?

These are the signs most often linked to water tank waterproofing:

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

The most common causes

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

How we choose the tool in Alqurayyat

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 — Alqurayyat

Questions from Alqurayyat

Common mistakes we see

• Using a material that is not intended for drinking water

The written outputs

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