Roof waterproofing for schools in Alqurayyat

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

Roof waterproofing in Alqurayyat: the local context

The centre of Alqurayyat sits about 497 m above sea level (SRTM open elevation data). Team note on Alqurayyat: 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..

A school owner in Alqurayyat usually has a large flat roof that carries the whole building's rainwater, along with classrooms, staff rooms, and sometimes a water tank on the roof. Between terms the roof is quiet, but a leak discovered mid-term can disrupt lessons, damage ceilings, and stain walls that are expected to look clean for parents and inspectors. The owner's job is to plan the roof work so it happens on a schedule that suits the school year, not in the middle of an emergency.

Alqurayyat sits at about 497 m above sea level, so the town is high enough to be cooler than the lowlands, but roofs here still take the full force of sun by day and sudden downpours when they come. That combination of heat expansion and quick water runoff puts stress on joints, parapets, and drainage outlets. For a school, this means the roof should be inspected for cracks and blocked outlets before the hottest months, and any membrane or coating should be chosen for its ability to flex with temperature changes. The local elevation is a useful reminder that drainage slopes and outlets need to be checked carefully, since water has to leave the roof quickly.

A practical approach starts with a full roof walk to mark cracks, blistering, ponding areas, and failed sealant at upstands. Next, clear and clean the surface and repair any crack lines, which can be treated with crack injection at about SAR 40–120 per metre. Choose the main system to suit the roof: liquid roof waterproofing typically runs SAR 8–25 per m², bitumen membrane SAR 15–35 per m², and spray foam SAR 20–45 per m². Where insulation is also needed, XPS boards at SAR 12–30 per m² can be included in the plan. Any water tank on the roof should be checked separately, since tank internal coating is priced at SAR 25–60 per m². Finally, schedule the work outside teaching hours and set a follow-up inspection before the next rainy period.

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

When do you need roof waterproofing?

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

• The old waterproofing is cracking
• Stains on the top-floor ceiling after rain
• Water pooling on the roof

Causes we see in the field

• A common cause: cracks in the roof slab.
• A common cause: damaged waterproofing around tank and AC bases.
• Wrong falls towards the drains.

Tools we use in Alqurayyat

From the first visit to the report

1. Survey: Falls, drains and the condition of the old layer are recorded.
2. Preparation: Cleaning and repairs before any new layer.
3. Primer: The base coat that the system needs.
4. Waterproofing layers and details: Corners, upstands and bases get their own detail.
5. Flood test: The roof is flooded and checked before it is covered.

Facts and costs — Alqurayyat

Common questions about roof waterproofing in Alqurayyat

Common mistakes we see

• Covering the waterproofing before the flood test
• Ignoring the tank bases

What you receive

You receive: a quality record with photos and the flood-test result, in a technical report with a verification code.