Basement & foundation waterproofing for apartments in Alrass

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

Before we start: what we know about Alrass

The centre of Alrass sits about 695 m above sea level (SRTM open elevation data). Main roads in or near Alrass: King Abdulaziz Road, King Fahd Road, King Salman Road.

Team note on Alrass: 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 owner of an apartment building in Alrass often notices the problem first in the lowest level. A damp patch appears on a basement wall after a wet season, or a faint smell of moisture rises from a storage room that rarely gets used. The apartments above may look fine, yet the owner is left wondering whether the foundation is letting water in and what it will take to stop it before the damage spreads to the flats above.

Alrass sits at about 695 m above sea level, which places it on higher ground than many lower-lying parts of the city. That elevation does not make a building immune to water. Rain still collects against walls and runs toward whatever surface sits lowest, and a basement is exactly that point. Because the centre of the area is raised, owners should inspect the outer walls and the ground sloping toward the building, since poor drainage at the perimeter is a common reason water reaches the foundation. Understanding this helps an owner focus on the building's own weak points rather than assuming the site is dry.

Practical work should follow a clear order. Start by mapping where moisture appears, inside the basement, along cracks, and in the bathrooms above. Treat cracks first, since crack injection is priced per metre and is often the most direct fix for visible leaks. Next, address the main basement surfaces, where basement waterproofing is priced per square metre and can be paired with bitumen membrane or XPS boards for added protection against wet ground. Bathrooms should be sealed with bathroom waterproofing so that water from the flats above does not add to the problem. Finally, check any water storage tank and roof, where tank internal coating and liquid roof waterproofing offer targeted protection. Working through these steps in sequence keeps costs controlled and makes sure the most urgent leak is stopped before cosmetic finishing begins.

In apartment buildings, the floor below is often where a leak shows first.

When do you need basement & foundation waterproofing?

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

• Damp basement walls
• Salt marks at the bottom of the walls
• Water seeping in after rain

Where the problem usually comes from

• Rainwater draining towards the foundation — we check this before anything else.
• A high groundwater level — we check this before anything else.
• A common cause: cracks at construction joints.

Tools and methods, and when we use them

The steps in order

1. Finding the source: Groundwater, rain or a pipe — each needs a different treatment.
2. Preparation: Surfaces are cleaned and opened where needed.
3. Injection: Active cracks are injected.
4. Waterproofing layers: The system is applied on the right side of the wall where possible.
5. Follow-up: Readings are repeated after the treatment.

Quick comparison: facts and costs in Alrass

Common questions about basement & foundation waterproofing in Alrass

What we advise against

• Painting the basement wall while the water comes from outside

What you get after the work

The written output: the source, the treatment and the follow-up result. The report is numbered and can be checked with its verification code.