Roof waterproofing in Alzulfi: without breaking

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

What is specific about Alzulfi for roof waterproofing

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

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..

Roof waterproofing in Alzulfi starts with the height of the ground itself. The centre of Alzulfi sits about 615 m above sea level (SRTM open elevation data), which means a roof here is exposed to strong sun and wide temperature swings between day and night. Before any product is chosen, the technician checks how the existing roof surface has aged, whether the old membrane is lifting, and where water has been pooling or tracking through. Liquid roof waterproofing is priced at SAR 8–25 per m², and bitumen membrane at SAR 15–35 per m², so the choice of system is usually decided by the condition of the roof rather than by price alone.

Several points can only be settled at the site visit. The technician needs to walk the full roof, mark every crack and blister, and judge whether the substrate is sound enough to take a new layer without being stripped first. The slope, the drainage outlets, the parapet junctions and any rooftop tanks or pipe penetrations all affect where water will travel, so they are inspected in person. Crack repairs are priced separately at SAR 40–120 per metre, so the length of each crack found on the visit changes the final cost. Whether the roof needs insulation under the new finish is also decided on site, where boards are priced at SAR 12–30 per m² for XPS.

To help the technician arrive prepared, the homeowner can note when leaks have appeared, whether they follow rain or occur during heat, and any earlier repairs to the roof. Access arrangements matter too: confirm where the roof can be reached, whether the water supply to the building can be shut off during the work, and whether any rooftop tank will need its own treatment. If the roof also feeds a water tank, mention it, because tank internal coating is priced at SAR 25–60 per m² and is handled as a separate job. Clear answers to these questions let the visit focus on the roof itself and keep the work within a single, well-planned visit.

The aim is to locate the cause with instruments first, so any opening is limited to one point.

Signs worth paying attention to

The following signs are worth checking before they grow:

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

The most common causes

• Wrong falls towards the drains.
• Damaged waterproofing around tank and AC bases.
• Cracks in the roof slab — we check this before anything else.

Tools and methods, and when we use them

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 — Alzulfi

Common questions about roof waterproofing in Alzulfi

Common mistakes we see

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

The written outputs

You receive: a quality record with photos and the flood-test result, in a technical report with a verification code.