Water tank waterproofing for residential buildings in Qatif

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

Before we start: what we know about Qatif

Team note on Qatif: 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 Qatif sits about 5 m above sea level (SRTM open elevation data).

Qatif is about 2.5 km from the sea coast (OpenStreetMap).

Is water tank waterproofing worth doing for a home in Qatif, and how do you know whether your tank needs it? Qatif sits about 5 m above sea level, and it lies roughly 2.5 km from the sea coast. Those two facts matter because the air is humid and salty, and a rooftop or ground-level tank here is exposed to both. Over time, moisture and salt can work into concrete seams and hairline cracks, which is why many owners in the area look at tank internal coating before small leaks turn into structural damage. Tank internal coating is priced at SAR 25–60 per m², and the final figure depends on the surface area of your particular tank.

Our inspection starts with a visual check of the tank's walls, floor, lid and inlet and outlet fittings for staining, flaking or visible cracks. Where cracks are found, the technician measures their length, since crack injection is priced at SAR 40–120 per metre. The inspector then checks the roof area the tank sits on, because liquid roof waterproofing at SAR 8–25 per m² is often needed alongside tank work, and the same visit can note whether a bitumen membrane at SAR 15–35 per m² would suit the roof better. Each finding is written down with measurements, so you receive a clear record of what is needed and what can wait.

Before the visit, please clear access to the tank and the roof hatch so the technician can work safely and measure accurately. Note any past leaks, damp patches or repairs you remember, along with the approximate age of the tank and the date of the last cleaning. If the tank is inside a building, tell us where the access point is. Having these details ready helps the inspection move quickly and gives you a more accurate quote before any work begins.

For a residential building, shared risers, tanks and pumps are checked as one system.

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
• A tank that leaks after testing
• Deposits and flaking inside the tank

The most common causes

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

How we choose the tool in Qatif

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 — Qatif

Questions from Qatif

Mistakes that cost more

• 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.