Roof waterproofing for restaurants in Alrass

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

What is specific about Alrass for roof waterproofing

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.

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..

Roof leaks are the most common problem for restaurant roofs in Alrass. Kitchen extraction units, rooftop plant and heavy foot traffic from staff all put stress on the membrane, and small cracks or lifted seams often go unnoticed until water reaches the dining room ceiling. Because a restaurant cannot easily close for repairs, owners usually want a fix that is fast, clean and durable.

The local facts shape how we approach this. The centre of Alrass sits about 695 m above sea level, so the roof is exposed to strong sun and wide temperature swings between day and night. That means the surface must be able to move with the building rather than crack under expansion. For this reason, liquid roof waterproofing, typically priced at SAR 8–25 per m², is often a good match for flat restaurant roofs with irregular shapes, while bitumen membrane, at SAR 15–35 per m², suits areas that need a more traditional sheet system. Where insulation is also needed to keep kitchen heat down, XPS boards at SAR 12–30 per m² can be added beneath the waterproofing layer. Spray foam, at SAR 20–45 per m², is another option for quick coverage on certain roof types. Crack injection, priced at SAR 40–120 per metre, is used to seal specific defects before a full coating goes down.

Before the visit, ask the provider a few clear questions. Which system do they recommend for your roof surface, and why? Will they inspect the existing membrane, drainage outlets and any rooftop plant before quoting? Is the price given per square metre, and what does it include for preparation and cleaning? How will they plan the work around your opening hours and kitchen ventilation? Finally, ask how they will check that the repair is watertight before handing the roof back to you.

For restaurants, visits are planned outside service hours and recorded for the premises file.

When do you need 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

Where the problem usually comes from

• Damaged waterproofing around tank and AC bases — we check this before anything else.
• A common cause: wrong falls towards the drains.
• A common cause: cracks in the roof slab.

Tools we use in Alrass

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 — Alrass

Short answers for Alrass

Mistakes that cost more

• 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.