Roof waterproofing for duplexes in Al Azyzya, Riyadh

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

Roof waterproofing in Al Azyzya: the local context

The centre of Al Azyzya is at 24.5877, 46.7701, about 17 km from the centre of Riyadh, with an approximate radius of 3 km. The approximate area shown on the map is centred here. Main roads in or near Al Azyzya: Southern Ring Road, Southern Ring Road, Al-Kharj.

The centre of Al Azyzya sits about 589 m above sea level (SRTM open elevation data).

Before any product is chosen for a duplex roof in Al Azyzya, the first thing to check is the location itself. The centre of Al Azyzya sits at 24.5877, 46.7701, about 17 km from the centre of Riyadh, with an approximate radius of 3 km, so the district is a sizeable residential area rather than a compact core. It also sits about 589 m above sea level, which matters because a roof here is exposed to strong sun and dry air for long periods. Liquid roof waterproofing is typically priced at SAR 10–25 per m², bitumen membrane at SAR 15–35 per m², and XPS boards at SAR 15–30 per m², and these ranges are a reminder that the material should be matched to the roof's actual condition, not chosen on price alone.

What is left to the site visit is the part that only an inspection can settle. The technician needs to see the current roof surface, whether there are cracks, ponding areas, failed old coatings, or drainage outlets that are blocked. The roof's slope, the state of the parapets, and how water currently leaves the roof should be recorded on the spot. The same applies to the walls and junctions where the roof meets the upper floor of the duplex, since leaks often start at those joins. Crack injection, priced at SAR 40–125 per metre, may be relevant where cracks are found, but whether it is needed depends on what the visit reveals. Any decision about the scope of work should wait until these points are confirmed on the roof itself.

For the technician, the most useful information is a clear picture of what the homeowner has already seen and tried. Notes on past leaks, the season when they appear, and any earlier repairs help narrow the options quickly. It also helps to know whether the duplex is shared, since agreement between the two households may affect access and timing. Measuring the roof area in square metres before the visit allows the technician to give a sensible comparison against the per-m² ranges above. Bring a note of which rooms show damp below the roof, so the inspection can trace the water path from the roof down to the ceiling.

In a duplex, the two floors often share lines, so tests are done floor by floor.

Signs worth paying attention to

If you notice one of these signs in Al Azyzya, 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.
• A common cause: wrong falls towards the drains.
• A common cause: damaged waterproofing around tank and AC bases.

Tools we use in Al Azyzya

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 — Al Azyzya

Questions from Al Azyzya

What we advise against

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

What you get after the work

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.