Roof waterproofing for schools in Ahad Rafida

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

Before we start: what we know about Ahad Rafida

Team note on Ahad Rafida: 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 Ahad Rafida sits about 2055 m above sea level (SRTM open elevation data).

Main roads in or near Ahad Rafida: King Khalid Road.

Roof waterproofing for schools in Ahad Rafida starts with the altitude. The centre of Ahad Rafida sits about 2055 m above sea level (SRTM open elevation data), so the first thing a technician checks is how the roof surface and its drainage handle heavy rain and cold, and whether standing water can collect in any low spot. At this height, temperature swings between day and night can stress coatings and joints, so the condition of existing seams, parapets, and outlets is examined before any material is chosen. Schools often have large flat roof areas with many penetrations, such as vents, pipes, and access hatches, and each one is inspected for lifting or cracking.

Several decisions are left to the site visit, because they depend on what the technician finds on the roof itself. The choice between liquid roof waterproofing (SAR 8–25 per m²), bitumen membrane (SAR 15–35 per m²), and XPS boards (SAR 12–30 per m²) depends on the substrate, the slope, and how much the roof is used. Where cracks are present, crack injection (SAR 40–120 per metre) may be needed, and the length of each crack can only be confirmed once the surface is exposed. Access arrangements, working hours around school activities, and the sequence of work across different roof sections are also agreed on site, since classrooms below may be in use.

Information that helps the technician is worth gathering before the visit. Please share the roof plan with the drawn area in square metres, any previous waterproofing records, and a note of where leaks have appeared inside the building, especially after rain. Tell us which sections of the roof are accessible without disturbing lessons, and mention any water tanks or plant rooms on the roof, since tank internal coating (SAR 25–60 per m²) is a separate item. Clear answers to these points let the technician prepare a more accurate assessment and avoid repeat visits.

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

When do you need roof waterproofing?

These are the signs most often linked to roof waterproofing:

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

The most common causes

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

Tools we use in Ahad Rafida

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.

Quick comparison: facts and costs in Ahad Rafida

Short answers for Ahad Rafida

Mistakes that cost more

• 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.