Roof waterproofing in Alrass: with a verifiable technical report

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

Before we start: what we know about Alrass

Team note on Alrass: 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 Alrass sits about 695 m above sea level (SRTM open elevation data).

Main roads in or near Alrass: King Abdulaziz Road, King Fahd Road, King Salman Road.

Alrass sits at about 695 m above sea level, and the centre of town is the reference point for this elevation figure drawn from SRTM open elevation data. For roof work, that height matters because it places the area on a plateau where the ground and rooftops are exposed to changing conditions across the day and season. Roofs here are not sheltered in the way that low, enclosed valleys can be, so the surface sees direct sun, wind, and rapid temperature swings that stress the waterproofing layer over time.

Because of this exposure, we start every roof assessment by checking how the membrane has aged, not only whether it leaks today. Liquid roof waterproofing, priced at SAR 8–25 per m², suits roofs with many small details such as parapets, pipe penetrations and corners, since it forms a seamless skin that can follow those shapes. A bitumen membrane, at SAR 15–35 per m², gives a more robust layer for larger flat areas. Where insulation is also needed, XPS boards at SAR 12–30 per m² can sit beneath a protective finish. Each option carries a different practical outcome, so the choice depends on the roof's shape, its traffic and how it drains.

Owners often avoid trouble by addressing a few common errors early. Cracks are frequently painted over instead of being repaired, when crack injection at SAR 40–120 per metre would seal the path water actually takes. Ponding water is ignored, even though a correct fall toward drains prevents most repeat failures. Roofs are also sometimes coated without cleaning dust and loose material first, which stops the new layer from bonding properly. Finally, many owners wait until a leak reaches the ceiling before acting, when a scheduled inspection of the surface would have caught the problem while the repair was still small and inexpensive.

Each job ends with a written report that carries a verification code you can check on our site.

Signs that call for roof waterproofing

If you notice one of these signs in Alrass, 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.

Tools we use in Alrass

The steps in order

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 — Alrass

Short answers for Alrass

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.