Basement & foundation waterproofing for offices & commercial complexes in Unaizah

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

What is specific about Unaizah for basement & foundation waterproofing

Team note on Unaizah: 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 centre of Unaizah sits about 667 m above sea level (SRTM open elevation data).

Unaizah sits at the heart of Qassim, and the centre of the town lies about 667 m above sea level, according to SRTM open elevation data. For office buildings and commercial premises, that elevation shapes how water behaves around a basement. Ground in a town at this height drains on its own slopes, so rainwater and irrigation runoff tend to move toward lower ground and press against below-grade walls. Waterproofing for a basement here is therefore planned around pressure from the outside, not only damp rising from below.

Each local condition links to a practical choice. Because a basement waterproofing job is priced per square metre, with a range of SAR 50–145 per m², the scope is usually measured across all wetted walls and the floor slab, so owners know exactly which surfaces are covered. Where cracks appear in concrete, crack injection is quoted per metre at SAR 40–115 per m, which suits a building that has settled or shows hairline movement. Roof areas, often exposed to heat and rain, can be treated with liquid roof waterproofing at SAR 10–25 per m², while a bitumen membrane at SAR 15–35 per m² offers another route for flat roofs. Inside water tanks, tank internal coating at SAR 25–55 per m² protects the stored water and the structure. Insulating boards such as XPS boards at SAR 10–30 per m² can add protection where the wall is backfilled.

Owners who plan well tend to avoid a few common mistakes. They do not treat a basement as a single surface, and they do not ask for a price without a clear measured area, which leads to disputes later. They also avoid patching visible cracks without checking the cause, since a crack that keeps moving will reopen. Finally, they do not delay the work until water is already entering the offices, because the cost of repairing stored equipment, carpets and finishes usually exceeds the cost of protecting the structure in time.

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

When do you need basement & foundation waterproofing?

If you notice one of these signs in Unaizah, it is a good moment to talk to the team:

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

Where the problem usually comes from

• A common cause: a high groundwater level.
• Rainwater draining towards the foundation — we check this before anything else.
• A common cause: cracks at construction joints.

Tools we use in Unaizah

How the work is done, step by step

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.

Unaizah in facts and sources

Short answers for Unaizah

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.