Roof waterproofing for schools in Aldawadmi

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

Why roof waterproofing differs in Aldawadmi

Team note on Aldawadmi: 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 centre of Aldawadmi sits about 976 m above sea level (SRTM open elevation data).

Main roads in or near Aldawadmi: King Abdulaziz Road, Dawadmi Bujadiyah Road.

Will a flat school roof in Aldawadmi hold up to the heat and the rain? Many property owners ask this before planning repairs, and the answer depends on the roof's surface, its condition and the method chosen. Aldawadmi's town centre sits about 976 m above sea level according to SRTM open elevation data, so the roof is exposed to strong sun and wide temperature swings. Liquid roof waterproofing is priced at SAR 8–25 per m², bitumen membrane at SAR 15–35 per m², and XPS boards at SAR 12–30 per m². Each option suits a different roof, so the choice should follow a proper look at the surface rather than price alone.

The visit starts with a walk across the whole roof to find cracks, ponding areas, blistered sheets and failing joints. Where cracks are found, crack injection is quoted per metre at SAR 40–120 per m, so the inspector measures the length of every open crack and marks it for the quote. Drains, outlets and upstands around plant units are checked for blockage and seal failure, since these are the most common leak points on school buildings. The inspector also notes the existing surface type, because a membrane cannot simply be laid over a surface that is not ready to take it. Photos and measurements are recorded so the school can compare options side by side.

Before the visit, the school should gather any previous roof records, repair invoices and warranty papers, and note where water has appeared inside the building, including the dates and rooms affected. Clear access to the roof must be arranged, with the keys, ladder and roof hatch ready, and any classroom or staff areas beneath the work zone should be informed. It also helps to list the roof area in square metres and any rooftop tanks or equipment, because the tank internal coating is quoted at SAR 25–60 per m². Having this information ready lets the inspector give an accurate scope and a realistic estimate for the school's budget.

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 Aldawadmi, 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

Where the problem usually comes from

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

How we choose the tool in Aldawadmi

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.

Facts and costs — Aldawadmi

Questions from Aldawadmi

Common mistakes we see

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

What you get after the work

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.