Roof waterproofing for warehouses in Alzulfi

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

Roof waterproofing in Alzulfi: the local context

The centre of Alzulfi sits about 615 m above sea level (SRTM open elevation data). Main roads in or near Alzulfi: King Fahd Road, Sheikh Ibn Baz Square, King Salman Road.

Team note on Alzulfi: 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..

Before any quote is given for a warehouse roof in Alzulfi, the first thing a technician checks is the altitude of the site. The centre of Alzulfi sits about 615 m above sea level (SRTM open elevation data), and that height matters for how a roof is planned and protected. Elevation shapes the local weather and the way water and heat act on exposed surfaces, so the surface system has to be chosen with that in mind. Liquid roof waterproofing is typically priced from SAR 8–25 per m², while a bitumen membrane runs SAR 15–35 per m², and the choice between them depends on the roof's condition and how much movement the structure shows. Those figures are a starting range only and are confirmed once the roof has been inspected.

Several things can only be settled at the site visit. The technician needs to see the roof surface, the state of any existing coating, and every crack or joint that may need repair. Crack injection is charged per metre at SAR 40–120 per m, so the length and location of the cracks drive that part of the cost. The technician also judges whether the roof needs insulation under the waterproofing, where XPS boards at SAR 12–30 per m² may be considered, and whether any drainage points or upstands need attention. Access, roof load, and the condition of any parapets are also assessed on the day, because they change how the work can safely be carried out.

To help the technician prepare, it is useful to have the warehouse floor area and the roof's approximate area to hand, along with any previous waterproofing records, leak reports, and photographs taken after rain. Note where water has been seen inside the building and whether the leaks appear at the same spot after each storm. If the warehouse also has a water tank, mention it, since tank internal coating is priced at SAR 25–60 per m² and is often arranged during the same visit. Clear information at the start means the site visit is shorter and the written quote reflects the real condition of the roof.

For warehouses, work is phased around operations and stored goods.

Signs that call for roof waterproofing

The following signs are worth checking before they grow:

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

Causes we see in the field

• Damaged waterproofing around tank and AC bases — we check this before anything else.
• 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.

Facts and costs — Alzulfi

Questions from Alzulfi

Mistakes that cost more

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

The written outputs

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.