Water tank waterproofing in Alahsa: before summer & rain season

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

What is specific about Alahsa for water tank waterproofing

The centre of Alahsa sits about 152 m above sea level (SRTM open elevation data). Team note on Alahsa: 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..

Before summer and the rain season, the first thing a technician checks on a water tank in Alahsa is the tank's exposure and the state of its walls and seams, because the centre of Alahsa sits about 152 m above sea level (SRTM open elevation data), and the local conditions that follow from a site at that height shape how a tank is loaded and how its coating ages. Start with the tank's internal surfaces: look for hairline cracks, flaking, and any sign that the existing coating has lifted from the concrete or steel. The internal coating is usually priced at SAR 25–60 per m², and the figure depends on the condition of the surface that has to be prepared before any new layer goes on. Check the lid, the inlet and overflow fittings, and the joints where pipes pass through the wall, since these are common points for seepage that show up only after the first heavy rain.

Some items can only be settled on the site visit. The technician needs to measure the tank's real surface area, confirm whether the walls are concrete, plastered or steel, and decide whether crack injection is needed, which is usually quoted at SAR 40–120 per metre. Access matters too: a tank on a roof is handled differently from one at ground level, and roof work may call for a liquid waterproofing layer at SAR 10–25 per m² or a bitumen membrane at SAR 15–35 per m², depending on the substrate. Whether an epoxy coating (SAR 35–90 per m²) or a spray foam layer (SAR 20–45 per m²) is the better fit is also a decision for the visit, once the tank's condition and the water it holds are known.

To help the technician, have the following ready before the visit: the tank's approximate dimensions, its age, the material it is built from, the date of any previous coating, and whether the water stored is for drinking or for general use. Note any staining, damp patches or water marks you have noticed and roughly when they appeared. Clear the area around the tank and the access route, and make sure the water level can be lowered on the day so the inside can be inspected. The more of this is known in advance, the faster the technician can judge the work and the more accurately the quote can reflect what the tank actually needs before the rain season arrives.

Checks before summer and before the rain season catch problems while they are still small.

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

Where the problem usually comes from

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

How we choose the tool in Alahsa

The steps in order

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.

Alahsa in facts and sources

Questions from Alahsa

What we advise against

• 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.