Basement & foundation waterproofing for duplexes in Aldawadmi

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

What is specific about Aldawadmi for basement & foundation waterproofing

The centre of Aldawadmi sits about 976 m above sea level (SRTM open elevation data). Main roads in or near Aldawadmi: King Abdulaziz Road, Dawadmi Bujadiyah Road.

Team note on Aldawadmi: 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..

Is water seeping through the basement wall of your duplex in Aldawadmi, and what can actually be done about it? The centre of Aldawadmi sits about 976 m above sea level, and that is a useful starting point for any owner trying to understand their site. Waterproofing a basement or foundation is not a single product applied the same way everywhere; the method depends on what the inspection finds. For below-ground work on a duplex, the common options are a bitumen membrane, which typically costs SAR 15–35 per m², and XPS boards, which typically cost SAR 12–30 per m². Where cracks are present, crack injection is priced at SAR 40–120 per metre. Basement waterproofing as a full scope is quoted at SAR 50–150 per m².

When a technician visits, the work begins with an inspection of the basement walls, floor and any visible cracks, followed by a check of the surfaces that will receive treatment. The technician will measure the affected area in square metres and mark any cracks by length in metres, since these two measurements drive the cost. If the basement is connected to a water tank or shares a wall with a bathroom, those areas are assessed separately, because bathroom waterproofing is priced at SAR 15–40 per m² and tank internal coating at SAR 25–60 per m². The inspection also records where water enters, so the recommended method targets the source rather than only the surface.

Before the visit, gather the information that makes the inspection faster and the quote more accurate. Note when water first appeared, whether it follows heavy rain or appears year-round, and which walls or corners are affected. Clear access to the basement walls and floor, and remove stored items from the area being checked. If you have any earlier repair records or plans for the duplex, have them ready. Make sure someone who can answer questions about the building is present. With these details in hand, the technician can measure, explain the options and give you a clear basis for deciding how to proceed.

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

When do you need basement & foundation waterproofing?

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

Where the problem usually comes from

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

Tools we use in Aldawadmi

From the first visit to the report

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.

Aldawadmi in facts and sources

Questions from Aldawadmi

Mistakes that cost more

• Painting the basement wall while the water comes from outside

What you receive

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