Water tank waterproofing for apartments in Allith

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

Before we start: what we know about Allith

Main roads in or near Allith: Al Laith Road, Amr Bin Al Aas Street. The centre of Allith sits about 5 m above sea level (SRTM open elevation data).

Allith is about 1.2 km from the sea coast (OpenStreetMap).

Allith sits about 5 m above sea level, and its centre lies roughly 1.2 km from the sea coast (OpenStreetMap). Those two facts shape how water tanks in apartment buildings are handled here. A site this close to the coast is exposed to salt-laden humid air, which can speed up corrosion of exposed metal fittings and weaken coatings that are not chosen for that environment. The low elevation also means groundwater and surface runoff can sit closer to foundations, so tank bases and inlet points need careful sealing to keep moisture from working its way in.

Each of these conditions has a practical effect on the work. Because the coast is near, we favour coating systems that tolerate salt and humidity, and we check tank surfaces for early signs of corrosion before any new layer goes on. The modest elevation means we pay close attention to drainage around the tank and to the seal where the tank meets its base. Our tank internal coating is priced at SAR 25–60 per m², and the final figure depends on the tank's size, its condition and the access available inside the building. For roof-level tanks, liquid roof waterproofing at SAR 8–25 per m² is often used to protect the surfaces that collect rain and dust, while bitumen membrane at SAR 15–35 per m² is an option where a more robust sheet layer suits the roof.

Owners in Allith can avoid several common mistakes. The first is coating a tank without cleaning and drying it first, since trapped moisture stops coatings from bonding. The second is ignoring small cracks, which are far cheaper to treat early; crack injection at SAR 40–120 per metre is a targeted fix that prevents larger leaks later. The third is choosing a cheap product without asking whether it suits a coastal, humid setting. Finally, many owners wait until water stains appear on ceilings below before inspecting the tank at all. A routine check of the tank and its seals, especially after the rainy season, usually reveals problems while they are still small and easy to fix.

In an apartment, a problem may start in your unit or in a shared line; we separate the two before any work.

Signs worth paying attention to

If you notice one of these signs in Allith, it is a good moment to talk to the team:

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

Tools and methods, and when we use them

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 — Allith

Short answers for Allith

What we advise against

• 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.