Basement & foundation waterproofing for apartments in Tabarjal

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

Before we start: what we know about Tabarjal

The centre of Tabarjal sits about 548 m above sea level (SRTM open elevation data). Team note on Tabarjal: 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..

An apartment owner in Tabarjal might notice damp patches creeping up a basement wall after a wet spell, or a hairline crack in the foundation slab that seems to widen each season. Many owners in this situation assume the problem is cosmetic and postpone any action, only to find that moisture has spread into stored belongings and finishes. Basement and foundation problems in apartment buildings tend to affect shared structures, so the decision often involves several households at once.

The centre of Tabarjal sits about 548 m above sea level, which places it on higher ground than many surrounding areas. For a homeowner, this means that water does not always pool where you expect it to. Instead, rainwater can run downhill along the outside of a building and press against lower walls and slabs, so the basement may be the point where it finds its way in. Elevation also shapes how quickly surface water drains away, which is why a wall that stays dry in one season can show staining in another. Understanding this helps owners focus on the outer face of the foundation and the drainage around it, not only the visible inside surface.

Begin by documenting the damp areas and cracks with dated photographs and a simple sketch of where each mark appears, so you can track whether they change. Next, identify which surfaces need treatment: basement walls and floors are typically priced at SAR 50–150 per m², while crack injection is priced at SAR 40–120 per metre, so measure the length of each crack before requesting quotes. Then compare materials for the specific job. Epoxy coating, at SAR 35–90 per m², suits surfaces that need a sealed finish, while spray foam at SAR 20–45 per m² and XPS boards at SAR 12–30 per m² serve different insulation and moisture needs. Bitumen membrane, at SAR 15–35 per m², is another option for below-ground work. Finally, if any bathroom or roof areas above the apartment are involved, price those separately, since bathroom waterproofing runs SAR 15–40 per m² and liquid roof waterproofing SAR 8–25 per m². Agree the scope in writing with all affected owners before work begins.

In an apartment, a problem may start in your unit or in a shared line; we separate the two before any work.

Signs worth paying attention to

The following signs are worth checking before they grow:

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

The most common causes

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

Tools and methods, and when we use them

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 — Tabarjal

Questions from Tabarjal

What we advise against

• Painting the basement wall while the water comes from outside

What you get after the work

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