Roof waterproofing for schools in Aldiriyah

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

Roof waterproofing in Aldiriyah: the local context

The centre of Aldiriyah sits about 655 m above sea level (SRTM open elevation data). Team note on Aldiriyah: 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..

Roof leaks are the most common waterproofing complaint at school buildings. Flat roofs collect rainwater and dust, and over time the surface cracks, lifts at the edges and lets water into classrooms, corridors and store rooms below. In Aldiriyah, the centre sits about 655 m above sea level, so the site is well inland and the roof is exposed to strong sun and heat for much of the year. That combination of heat expansion and occasional heavy rain is what usually breaks down the surface before the structure itself is at risk.

Because of this, the approach for a school roof in Aldiriyah starts with the roof surface itself. Liquid roof waterproofing, priced at SAR 8–25 per m², is often suited to large flat areas where the aim is to seal a continuous surface without adding much weight. Bitumen membrane, at SAR 15–35 per m², is another option for roofs that need a thicker, more robust layer. Where insulation is part of the work, XPS boards at SAR 12–30 per m² can be fitted beneath the waterproof layer. Crack injection, at SAR 40–120 per metre, is used for localised splits, and spray foam at SAR 20–45 per m² may suit irregular or hard-to-reach sections. Each option is chosen after the roof has been inspected, not from the list alone.

Before the visit, ask the provider to confirm which roof areas they plan to inspect and whether the quote covers the full roof or only the leaking sections. Ask how the price per m² is measured, and whether any repair to cracks or drainage is included or charged separately. Request a written note on the proposed system and on how the work will be scheduled around school hours, since classrooms and walkways may need to stay usable. Finally, ask who will be on site and how they will record the condition of the roof before and after the work, so the school has a clear reference for future maintenance.

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

Signs worth paying attention to

These are the signs most often linked to roof waterproofing:

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

Where the problem usually comes from

• Damaged waterproofing around tank and AC bases.
• A common cause: wrong falls towards the drains.
• Cracks in the roof slab.

Tools and methods, and when we use them

How the work is done, step by step

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.

Quick comparison: facts and costs in Aldiriyah

Questions from Aldiriyah

Common mistakes we see

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

What you receive

The written output: a quality record with photos and the flood-test result. The report is numbered and can be checked with its verification code.