Bathroom waterproofing for schools in Alzulfi

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

Bathroom waterproofing in Alzulfi: the local context

The centre of Alzulfi sits about 615 m above sea level (SRTM open elevation data). Main roads in or near Alzulfi: King Fahd Road, Sheikh Ibn Baz Square, King Salman Road.

Team note on Alzulfi: 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 first thing checked for a school bathroom in Alzulfi is the elevation, because the centre of Alzulfi sits about 615 m above sea level (SRTM open elevation data). At that height, the site is not at the low point of the town, so surface water is more likely to run away from the building than collect around it. That said, the technician still needs to confirm how water moves across the plot and whether any drain or slope is directing runoff toward the wall where the bathroom sits. Bathroom waterproofing for school use is usually priced at SAR 15–40 per m², and the cost depends largely on the condition of the existing floor and walls, which is why the first check is always the substrate.

What is left to the site visit is the detail that no desk estimate can settle. The technician will look at the existing tiles, grout lines, junctions with the wall, floor gullies and any hairline cracks that could let water pass. Where a crack is found, crack injection is priced at SAR 40–120 per metre, so its length matters. The choice between epoxy coating at SAR 35–90 per m² and spray foam at SAR 20–45 per m² also depends on the surface and how heavily the room is used. These judgements belong on site, with the actual surfaces in front of the technician, and they should not be fixed in advance from a brochure or a remote survey.

For the technician, it helps to arrive with the school's floor plan, the number of bathroom rooms, and the age of the existing works. Note whether the building has a rooftop tank, since tank internal coating runs at SAR 25–60 per m² and is a separate item from the bathroom. Ask the school administration when the bathrooms can be closed, because a coating needs the surface to be clean and dry before it cures. Record the orientation of the wet areas and any visible staining, as these clues show where moisture has already travelled. Bring a clear plan for access so students are kept away from the work area during application.

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

When do you need bathroom waterproofing?

The following signs are worth checking before they grow:

• A stain under the bathroom on the floor below
• Damp around the shower
• Worn grout

The most common causes

• Corners without waterproofing tape — we check this before anything else.
• A damaged floor layer.
• A common cause: the area around the floor drain.

Tools we use in Alzulfi

How the work is done, step by step

1. Finding the source: A supply-pipe leak is ruled out first.
2. Preparation: The floor is opened and cleaned where needed.
3. Corners and details: Tape and detailing at corners, drains and pipe entries.
4. Flood test: The floor is tested before tiling.

Alzulfi in facts and sources

Short answers for Alzulfi

Mistakes that cost more

• Waterproofing the floor while the supply pipe still leaks

What you receive

You receive: the flood-test result and photos of each stage, in a technical report with a verification code.