Basement & foundation waterproofing for offices & commercial complexes in Alrass

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

Why basement & foundation waterproofing differs in 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 most common problem we see in office and commercial basements is water seeping through the lower walls and floor slab, usually at construction joints, wall-to-floor junctions and hairline cracks. In a building used daily by staff and visitors, even a slow leak can ruin finishes, damage stored records and equipment, and create slippery, unhealthy conditions. Because basements sit below ground, the work must control water pressure from the outside, not just patch the visible damp on the inside.

Alrass sits at about 695 m above sea level, which shapes how we approach these jobs. Elevation affects the local ground and drainage pattern, so a basement here should be assessed for how surface run-off collects around the structure, not treated as an isolated problem. Crack injection is priced per metre, from SAR 40 to SAR 120 per m, which makes it a practical first step where cracks are isolated and clearly identified. Where the whole wall or floor area needs protection, options include a bitumen membrane at SAR 15 to SAR 35 per m², and basement waterproofing itself at SAR 50 to SAR 150 per m². Epoxy coating, at SAR 35 to SAR 90 per m², is often used on interior surfaces, while XPS boards at SAR 12 to SAR 30 per m² can help protect membranes during backfilling. The right combination depends on where the water is entering.

Before the visit, ask the provider to explain how they will locate the source of the leak rather than only sealing the surface. Request a written breakdown that shows the area measured in square metres or the length of cracks in metres, so you can compare each line item against the rates above. Ask which materials they propose and why, whether the work will affect business operations and how the space will be cleared, and how the building's drainage and the ground around the basement will be checked. A clear, itemised answer to these questions is a good sign of a careful provider.

For offices and commercial complexes, work is scheduled to avoid disrupting staff and visitors.

Signs worth paying attention to

These are the signs most often linked to basement & foundation waterproofing:

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

The most common causes

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

How we choose the tool in Alrass

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

Short answers for 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.