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

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

What is specific about Arar for basement & foundation waterproofing

The centre of Arar sits about 553 m above sea level (SRTM open elevation data).

For companies in Arar, the most common problem with basement and foundation waterproofing is water entering through cracks and wall-to-floor joints after heavy rain, which can lead to damp patches, staining and gradual damage to stored goods and equipment. Crack injection is often the first step, usually priced per metre at SAR 40–120 per m, while a full basement system typically falls within SAR 50–150 per m² depending on the work involved. Because basements are often used for storage, plant rooms or archives in commercial buildings, even small leaks can disrupt operations, so a clear scope agreed early saves time later.

The location shapes the approach. The centre of Arar sits about 553 m above sea level, so the site is not low-lying in the way coastal or floodplain sites can be, but water still collects around foundations where drainage is poor or ground slopes towards the building. For this reason, the approach should look closely at external ground levels and how surface water is directed away from the structure, not only at the inside of the basement wall. Where a basement shares walls with other structures or tanks, the same thinking applies to any water storage areas, where internal tank coating, usually SAR 25–60 per m², may be needed alongside the main waterproofing. Materials are chosen to suit the specific substrate and exposure, whether that is an epoxy coating at SAR 35–90 per m², spray foam at SAR 20–45 per m², or a bitumen membrane at SAR 15–35 per m².

Before the visit, ask the company to share the building drawings or a description of the basement depth and wall construction, the areas where water appears and when it occurs, and whether there have been previous repairs or coatings. Confirm what is being stored or used in the space, since this affects the level of protection needed and how long work can be paused. Ask for the site to be accessible during the survey, including any external areas around the foundations. Clarify who will handle any drainage or excavation work, and whether the quote will cover only the waterproofing or also the making-good of finishes afterwards. These questions help the surveyor give a realistic scope and avoid surprises on the day.

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

Signs that call for basement & foundation waterproofing

The following signs are worth checking before they grow:

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

Causes we see in the field

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

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.

Facts and costs — Arar

Common questions about basement & foundation waterproofing in Arar

Common mistakes we see

• 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.