Roof waterproofing for restaurants in Al Mhmdya, Riyadh

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

Roof waterproofing in Al Mhmdya: the local context

The centre of Al Mhmdya is at 24.7326, 46.6503, about 3.3 km from the centre of Riyadh, with an approximate radius of 2 km. The service-area circle on the map below is drawn from this point. Main roads in or near Al Mhmdya: King Fahd Road, King Abdullah Road, Al Takhassusi Road.

The nearest wadi channel is about 1.9 km from the centre of Al Mhmdya (OpenStreetMap). The centre of Al Mhmdya sits about 625 m above sea level (SRTM open elevation data).

Roof leaks are the most common waterproofing problem for restaurants in Al Mhmdya. Commercial kitchens generate heavy steam, grease-laden vents and constant foot traffic on rooftop plant areas, and over time these wear through the top layer of a roof and let water seep into the ceiling below. Many owners only notice the problem when a stain appears above a dining area or a kitchen hood starts dripping. By then, the damage has often spread beyond a single patch, so the work needs to be planned around the full roof rather than one spot.

The location shapes how we approach the job. The centre of Al Mhmdya sits at 24.7326, 46.6503, about 3.3 km from the centre of Riyadh, and its neighbourhood is around 625 m above sea level, so roofs here are exposed to strong sun and wide temperature swings that stress membranes. The nearest wadi channel is about 1.9 km from the centre, which means rain can arrive in short, heavy bursts and water must be drained away from the roof edges quickly. For restaurant roofs, we typically compare options such as liquid roof waterproofing at SAR 10–25 per m², bitumen membrane at SAR 15–35 per m², and spray foam at SAR 20–45 per m², then match the choice to the roof's condition, access and how long the kitchen can tolerate disruption. Cracks found during inspection can be treated with crack injection at SAR 40–125 per metre.

Before the visit, ask the provider a few clear questions. Ask whether they will inspect the roof surface, the drainage outlets and any areas around kitchen exhaust and plant units, and whether they will report what they find before quoting. Confirm the per-square-metre rate that applies to your roof, what is included in that rate, and how work will be scheduled so that cooking and service are not interrupted. Finally, ask how the roof will be checked after completion, so you know the repair has held through the first heavy rain.

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

Signs worth paying attention to

If you notice one of these signs in Al Mhmdya, it is a good moment to talk to the team:

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

Causes we see in the field

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

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.

Quick comparison: facts and costs in Al Mhmdya

Questions from Al Mhmdya

Mistakes that cost more

• 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.