Basement & foundation waterproofing in Bishah: for companies (annual contract)

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

What is specific about Bishah for basement & foundation waterproofing

Main roads in or near Bishah: King Saud Road, Riyadh Street. The centre of Bishah sits about 1169 m above sea level (SRTM open elevation data).

Does a basement in Bishah really need waterproofing, given the city's climate? Bishah sits at a high altitude, with the centre about 1169 m above sea level, and that elevation is a good reason to take ground water and wall seepage seriously when you plan a below-grade space. Property owners often assume that a dry-looking basement needs no attention, yet damp patches and hairline cracks can appear over time. For basement and foundation work, the usual options are priced per square metre. Basement waterproofing runs from SAR 50 to SAR 150 per m², bitumen membrane from SAR 15 to SAR 35 per m², and XPS boards from SAR 12 to SAR 30 per m². Where a wall shows a split rather than a general dampness problem, crack injection is priced per metre at SAR 40 to SAR 120 per m, so the right method depends on what is actually happening in the structure.

A site visit begins with a walk through the basement and the outside ground around the foundation, looking for staining, efflorescence, and the path water takes toward the slab and walls. The inspector maps every crack and notes its length, because crack injection is measured in metres and the scope has to match the damage. Walls and floors are checked for moisture, and the surrounding area is observed to judge whether runoff collects near the building. Any existing coatings or membranes are examined for lifting or failure. The findings are then translated into a recommended system, with the measured area or length that the price will be based on, so the client can see exactly what each figure covers before work is agreed.

Before the visit, gather the building records you already have, such as the original plans, any previous waterproofing invoices, and notes on past leaks or repairs. Clear as much of the basement as you can so the walls and floor are reachable, and make sure the inspector can access the exterior around the foundation. Note when you first noticed water and whether it appears after rain or all year. Measure the basement walls and floor roughly, since this helps in estimating the area. Having this information ready lets the inspection move faster and gives you a clearer basis for comparing the quoted options.

For companies, an annual contract sets the scope, the visit schedule and the reports in writing.

Signs worth paying attention to

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

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

Where the problem usually comes from

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

Tools and methods, and when we use them

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.

Bishah in facts and sources

Common questions about basement & foundation waterproofing in Bishah

Mistakes that cost more

• Painting the basement wall while the water comes from outside

What you get after the work

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