Floor & balcony waterproofing for schools in Sabya

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

What is specific about Sabya for floor & balcony waterproofing

Team note on Sabya: 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.. Main roads in or near Sabya: King Fahd Road, King Abdulaziz Road, King Abdullah bin Abdulaziz Road.

The centre of Sabya sits about 40 m above sea level (SRTM open elevation data). Sabya is about 16.7 km from the sea coast (OpenStreetMap).

A school owner in Sabya is usually responsible for several large, flat surfaces at once: classroom floors, corridor slabs, and the balconies or covered walkways that link buildings. Most of the time nobody notices these areas until a stain appears on a ceiling below or a tile lifts near a drain. By then, water has often been travelling through the structure for some time, and repairs that could have been small become disruptive to lessons and costly to undertake during term.

The local facts shape how this should be approached. The centre of Sabya sits about 40 m above sea level, and the town is about 16.7 km from the sea coast. Sites at this height are not usually in the lowest-lying part of the region, so the main concern for a school is typically rainwater that runs across roofs and balconies and then seeps through joints, rather than groundwater rising from below. That makes the roof and balcony layers, and the junctions where they meet walls and drains, the priority for an owner to inspect. Basement work, which is priced at SAR 50–150 per m² and is generally a separate decision, is less likely to be the first need for a school of this type.

A sensible sequence starts with a walk-through after rain, looking for damp patches, cracks, and ponding water on balconies. Next, mark every crack and measure its length, since crack injection is priced per metre at SAR 40–120 per m and needs to be budgeted accurately. Then decide the surface treatment: liquid roof waterproofing at SAR 8–25 per m², a bitumen membrane at SAR 15–35 per m², or spray foam at SAR 20–45 per m² are common options, and the right one depends on the slab and how the area is used. Where balconies receive heavy foot traffic, epoxy coating at SAR 35–90 per m² may suit the walking surface. Finally, schedule the work for school holidays, clear the area, and check drain outlets before and after treatment so that water keeps moving away from the building.

For schools, the larger jobs are planned for weekends and holidays.

Signs worth paying attention to

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

• Damp under the light well
• Water passing from the balcony to the floor below
• A wrong fall towards the door threshold

Where the problem usually comes from

• A blocked drain.
• A threshold without waterproofing — we check this before anything else.
• A common cause: incorrect falls.

Tools and methods, and when we use them

How the work is done, step by step

1. Checking the falls: Where water collects and where it should go.
2. Details: Thresholds, drains and upstands.
3. Waterproofing: The layer is applied and protected.
4. Flood test: Tested before the finish goes on.

Facts and costs — Sabya

Common questions about floor & balcony waterproofing in Sabya

Mistakes that cost more

• Tiling a balcony without waterproofing

What you get after the work

You receive: the flood result and photos of the details, in a technical report with a verification code.