Roof waterproofing for restaurants in Al Wzarat, Riyadh

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

What is specific about Al Wzarat for roof waterproofing

The centre of Al Wzarat is at 24.6769, 46.7135, about 5.6 km from the centre of Riyadh, with an approximate radius of 1.6 km. The approximate area shown on the map is centred here. Main roads in or near Al Wzarat: Makkah Road, King Saud Road, Prince Abdulaziz bin Musaed bin Jalawi Road.

The centre of Al Wzarat sits about 602 m above sea level (SRTM open elevation data).

Roof work for a restaurant in Al Wzarat starts with the location itself. The centre of Al Wzarat sits at 24.6769, 46.7135, about 5.6 km from the centre of Riyadh, with an approximate radius of 1.6 km, so most sites here are close to the city's busy commercial core and see heavy daily traffic from kitchens, delivery vehicles and rooftop equipment. The centre of the area also sits about 602 m above sea level, which means technicians look closely at how rainwater and condensation drain from the roof surface. Before any product is named, the first check is whether the existing roof falls toward its outlets, whether ponding forms after rain, and whether the membrane or coating already in place has lifted at its edges. Liquid roof waterproofing typically falls within SAR 10–25 per m², and bitumen membrane within SAR 15–35 per m², so the choice of system usually depends on the condition of the substrate rather than on cost alone.

The points below are left to the site visit, because they cannot be judged from a description. These include the exact slope and drainage capacity of the roof, the age and thickness of any existing layer, the condition of parapets, penetrations for extraction ducts and air conditioning units, and whether rooftop plant or tanks sit on the surface. Crack injection, priced at SAR 40–125 per metre, is only confirmed once cracks are measured and traced. Where insulation is wanted beneath the new layer, XPS boards at SAR 15–30 per m² are considered only after the surface has been inspected and the load and fixing method understood. Coatings such as epoxy, at SAR 35–95 per m², and spray foam, at SAR 20–45 per m², are also chosen on site, since their suitability depends on the roof's exposure and how it is used.

To help the technician arrive prepared, the restaurant team should share a few details in advance: when leaks have appeared and whether they follow heavy rain or kitchen activity, which parts of the roof are walked on or used for storage, and any previous repair records. Clear access to the roof, the location of drains and any rooftop tanks should also be noted. With this information, the visit can focus on the roof itself, and the choice of system can be made on the basis of what is actually found there.

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

Signs that call for roof waterproofing

The following signs are worth checking before they grow:

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

Causes we see in the field

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

How we choose the tool in Al Wzarat

From the first visit to the report

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 — Al Wzarat

Short answers for Al Wzarat

What we advise against

• 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.