Bathroom waterproofing for schools in Alula

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

Why bathroom waterproofing differs in Alula

Main roads in or near Alula: King Abdullah Road. The centre of Alula sits about 697 m above sea level (SRTM open elevation data).

Bathroom waterproofing in school buildings in Alula most often fails at the junctions: where the floor meets the wall, around drains, and where pipes pass through the slab. Pupils use these rooms heavily and water is used often, so small gaps that never show up in a private home can soak through and damage ceilings and classrooms below. The first step is usually to check these edges closely before any new coating is chosen.

Alula sits at about 697 m above sea level, which is high enough that the local approach needs to account for the site's exposure and the way the building is used. Costs for bathroom waterproofing are typically quoted at SAR 15–40 per m², while epoxy coating is SAR 35–90 per m² and spray foam is SAR 20–45 per m². For wet floors that see constant cleaning and heavy use, a coating system may suit better than a single thin layer, and a contractor should explain why one option fits the room better than another. Where cracks run along the wall-floor line, crack injection at SAR 40–120 per metre is often considered before the surface is treated.

Before the visit, ask the provider to confirm which bathrooms are in scope and whether the work will be done in term time or during breaks. Ask how they will protect pupils and staff, how long the rooms will be out of use, and what preparation the school must do in advance. Request a written breakdown that states the rate per m² for each area and what is included, such as drain sealing and pipe collars. Ask to see the areas they will inspect, and note any past leaks reported in neighbouring rooms, since these can point to a shared fault.

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:

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

The most common causes

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

Tools and methods, and when we use them

From the first visit to the report

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.

Facts and costs — Alula

Questions from Alula

What we advise against

• 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.