Basement & foundation waterproofing for duplexes in Abu Arish

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

Before we start: what we know about Abu Arish

The centre of Abu Arish sits about 67 m above sea level (SRTM open elevation data). Team note on Abu Arish: 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..

Basement and foundation leaks in duplexes most often show up as damp patches along the lower walls, efflorescence on the concrete, and cracks that widen after heavy rain. In a split-level home, the lower floor carries the full weight of soil and groundwater pressure, so a small gap in the foundation can cause a steady seep that reaches the living space before anyone notices it. For this reason the first step is usually to trace where the water is entering rather than simply coating the surface.

Abu Arish sits about 67 m above sea level, which is a useful fact for planning. The town is not on a low coastal flat where water tends to pool, but it does sit in a landscape where rainfall runs off sloping ground and gathers around foundations. Our approach here starts with checking how water moves around the plot, whether gutters and downpipes discharge close to the walls, and whether the ground level outside has been raised over time. Where cracks are active, crack injection is priced per metre, typically SAR 40–120 per m, so the length of the crack matters as much as the surface area. For the basement walls themselves, basement waterproofing is quoted at SAR 50–150 per m², and the choice between membrane, epoxy or spray foam depends on whether the wall is dry to the touch and how much pressure it is under.

Before the visit, it helps to have a few details ready. Tell us the approximate floor area of the basement and any bathrooms or water tanks on the lower level, because bathroom waterproofing (SAR 15–40 per m²) and tank internal coating (SAR 25–60 per m²) are priced separately. Describe where you see damp, whether it appears after rain or all year, and whether any cracks have changed in width. Photos of the outside wall and the drainage around the house are also useful. With this information we can arrange a site visit that focuses on the real source of the leak and give you a clear picture of the options before any work begins.

In a duplex, the two floors often share lines, so tests are done floor by floor.

Signs worth paying attention to

If you notice one of these signs in Abu Arish, 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

The most common causes

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

Tools we use in Abu Arish

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 Abu Arish

Questions from Abu Arish

What we advise against

• Painting the basement wall while the water comes from outside

What you receive

You receive: the source, the treatment and the follow-up result, in a technical report with a verification code.