Water tank waterproofing in Afif: without breaking

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

Why water tank waterproofing differs in Afif

Team note on Afif: 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.. Main roads in or near Afif: King Abdulaziz Road, King Faisal Road, Airport Road.

The centre of Afif sits about 1040 m above sea level (SRTM open elevation data).

Can a water tank be waterproofed in Afif without draining the whole building or tearing out the roof? Many owners here ask this, and the answer depends on what is leaking and where. Afif sits at a high altitude, with the centre about 1040 m above sea level, so rooftop tanks and their supporting structures see strong sun and wide temperature swings. Those conditions can open hairline cracks over time, which is why an inspection should come before any product is chosen. The tank internal coating is priced at SAR 25–60 per m², while liquid roof waterproofing runs SAR 8–25 per m², so the right method and the true size of the job matter for the final cost.

A sound visit starts with the tank itself. The technician checks the interior walls and floor for cracks, flaking, and damp patches, then moves to the outside faces and the roof slab that carries the tank. Where a crack is found, the length is measured, since crack injection is priced at SAR 40–120 per metre. Surfaces are sounded for hollow areas and checked for moisture before any coating is recommended. Where the leak is through a roof area, the surface is measured in square metres so that liquid roof waterproofing, bitumen membrane at SAR 15–35 per m², or spray foam at SAR 20–45 per m² can be compared. The inspector then explains which method suits the defect, and what each option will cost, before any work begins.

Before the visit, gather what helps the inspector work quickly. Note when the leak first appeared, whether it grows after rain or after the tank is filled, and which rooms or ceilings show stains. Have access to the roof, the tank room, and any shaft or utility space behind the tank, and clear items stored nearby. If you have an earlier plan of the roof or building drawings, keep them ready, as they help confirm the areas to be measured. Make sure someone who can make decisions on site is available, and ask in advance whether the water supply will need to be paused during the work. Good preparation keeps the inspection focused and lets you receive a clear, itemised estimate based on the facts of your own tank.

The aim is to locate the cause with instruments first, so any opening is limited to one point.

Signs that call for 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.
• Cracks in the walls or floor — we check this before anything else.
• Damaged old coating.

Tools we use in Afif

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 — Afif

Short answers for Afif

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.