Water tank waterproofing in Aldarb: cost & published offers

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

Before we start: what we know about Aldarb

The centre of Aldarb sits about 79 m above sea level (SRTM open elevation data). Aldarb is about 18.7 km from the sea coast (OpenStreetMap).

Start with the setting. The centre of Aldarb sits about 79 m above sea level (SRTM open elevation data), and the town is about 18.7 km from the sea coast (OpenStreetMap). For a water tank, that means the technician should first look at how the tank is supported and fed, and at how water and moisture have moved through the walls and base over time, rather than assuming the same exposure as a coastal property. These two facts are the first things to note on the job sheet, because they frame the rest of the inspection.

Some points can only be settled on site. The technician will examine the tank's interior and exterior surfaces for cracks, delamination, efflorescence and any standing damp, and will decide whether the existing layer can be prepared and recoated or must be removed first. Crack width, the length of each crack, and whether it moves under load are judgements made at the tank itself. The same applies to the condition of the lid, the inlet and outlet fittings, and the roof slab beneath, since leaks often start at these junctions. Access, the presence of a drain or sump, and whether the tank can be emptied fully are also confirmed in person before any material is chosen.

Once the visit is complete, the technician will find it helpful to have a clear record of the measured areas and lengths. Interior tank coating is usually priced per m², at SAR 25–60 per m², while crack injection is priced per metre, at SAR 40–120 per m. Where the roof or an adjoining slab is included, liquid roof waterproofing runs SAR 8–25 per m², and XPS boards run SAR 12–30 per m². Epoxy coating, at SAR 35–90 per m², and spray foam, at SAR 20–45 per m², are other options that should be measured and noted separately. Recording each surface and its condition in this way lets the technician match the method to the actual defect and keeps the final quotation traceable to what was found.

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

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

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

Tools and methods, and when we use them

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.

Quick comparison: facts and costs in Aldarb

Questions from Aldarb

What we advise against

• 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.