Basement & foundation waterproofing for apartments 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).

Is water seeping into your basement or ground-floor flat in Unaizah, and is it worth fixing now? Unaizah sits about 667 m above sea level, and that matters less than the moisture that finds its way into lower levels of apartment blocks after rain or from the ground around them. Basement waterproofing here is priced at SAR 50–145 per m², and the right method depends on what is causing the problem. Bitumen membrane runs SAR 15–35 per m², while epoxy coating costs SAR 35–85 per m². Crack injection, which is often the first fix for a visible leak line, is priced at SAR 40–115 per metre. Knowing these ranges helps you ask sensible questions before any work begins.

Before any quote is agreed, a technician should walk the property and look at where the water is actually entering. The inspection normally starts with the walls and floor, checking for hairline cracks, damp patches, efflorescence (the white salt deposit left when water evaporates), and any gaps where pipes or cables pass through the structure. Bathroom floors above a basement are checked separately, since bathroom waterproofing at SAR 15–40 per m² may be the real source. Roof and tank areas are also inspected where relevant, because liquid roof waterproofing at SAR 10–25 per m² and tank internal coating at SAR 25–55 per m² are different jobs entirely. The technician should explain which area is failing and why, and should note the surfaces that need treatment and the measurements used for pricing.

To make the visit productive, gather a few details beforehand. Note when the damp first appeared and whether it worsens after rain or when the water supply is run, and take clear photographs of the affected walls and ceilings. Measure the length and approximate area of the affected sections, or have the building plan ready, so the surface area can be estimated per square metre. Clear access to the basement, bathrooms, roof hatch and any water tanks, and tell the technician about any repairs already tried. Finally, ask for each option to be listed with its material, its unit price and the area it covers, so you can compare fairly.

In apartment buildings, the floor below is often where a leak shows first.

Signs that call for basement & foundation waterproofing

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

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

The most common causes

• A common cause: a high groundwater level.
• Rainwater draining towards the foundation.
• Cracks at construction joints.

How we choose the tool 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.

Facts and costs — Unaizah

Questions from Unaizah

What we advise against

• Painting the basement wall while the water comes from outside

The written outputs

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