Roof waterproofing in Aljumum: with a verifiable technical report

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

Why roof waterproofing differs in Aljumum

Team note on Aljumum: 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 Aljumum sits about 200 m above sea level (SRTM open elevation data).

Does a roof in Aljumum really need a technical report before anyone starts work? Many owners ask this, and the answer depends on what the roof is exposed to. The centre of Aljumum sits about 200 m above sea level (SRTM open elevation data), so the roof is not a sea-level surface, but it still faces the same demands of rain, heat and sun that any roof here must handle. A written report gives you a record of what was found and what was recommended, so you are not relying on a verbal opinion when you compare options.

The inspection normally begins with a walk across the full roof surface to look for ponding, blistering, cracks, and failed joints around parapets, drains and rooftop fixtures. Where cracks are found, the report can note the length in metres so the repair can be priced against the rate for crack injection, which runs SAR 40–120 per m. The surface is then matched to a suitable system. 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 is recorded with its area, so the owner can see the figures side by side. Where a water tank sits on the roof, the report should also consider internal lining, which is listed at SAR 25–60 per m².

Before the visit, gather the building's drawings if you have them, any previous waterproofing records, and notes on past leaks, including the rooms affected and the season they occurred. Clear access to the roof, the stairwell and the plant area so the inspector can reach every section without delay. Mark the areas where water has been seen on ceilings, and photograph them if possible. Note which parts of the roof are used for storage, satellite equipment or air-conditioning units, since these must be moved or supported during works. Having this information ready lets the inspection focus on the roof itself and produces a report you can rely on when you decide.

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

Signs worth paying attention to

These are the signs most often linked to roof waterproofing:

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

Where the problem usually comes from

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

Tools we use in Aljumum

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 — Aljumum

Common questions about roof waterproofing in Aljumum

Common mistakes we see

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

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.