Roof waterproofing in Al Aryja, Riyadh: cost & published offers

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

Roof waterproofing in Al Aryja: the local context

The centre of Al Aryja is at 24.6257, 46.6566, about 10 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. The centre of Al Aryja sits about 629 m above sea level (SRTM open elevation data).

The nearest wadi channel is about 0.3 km from the centre of Al Aryja (OpenStreetMap). Main roads in or near Al Aryja: Yazid bin Abi Sufyan Road, Imam Abu Hanifa Road, Prince Fahd bin Faisal bin Farhan Al Saud Road.

Before any material is chosen for a roof in Al Aryja, the first thing to check is location and drainage, because the area sits at a high point with a nearby channel. The centre of Al Aryja is at 24.6257, 46.6566, about 10 km from the centre of Riyadh, and it sits about 629 m above sea level. The nearest wadi channel is about 0.3 km from the centre, so water that runs off a roof and across open ground can reach a low point quickly during heavy rain. A technician will therefore look at how the roof falls, where the outlets and parapets send water, and whether the surrounding ground directs flow back toward the building.

The points below are left to the site visit, because they depend on the particular building and cannot be judged from a map. These include the condition of the existing screed and any cracks, the age and type of the current membrane if one is present, the number and state of roof drains and outlets, how the roof edge and upstands are finished, and whether there is ponding after rain. The technician will also check whether a liquid roof system, a bitumen membrane or an insulated build-up using XPS boards suits the load and use of the roof, and whether any crack injection is needed before the main coating goes on. Access, roof area and the height of the building will shape the final quote, so these are assessed on site rather than estimated in advance.

To help the technician, it is useful to have ready the roof plan or rough sketch with its approximate dimensions, any previous waterproofing invoices or warranties, and a note of where leaks have appeared and in which season. Details of any work already done to adjacent walls, the basement or water tanks on the same property are also helpful, since these can share lines of water entry. Published ranges for reference are liquid roof waterproofing at SAR 10–25 per m², bitumen membrane at SAR 15–35 per m², spray foam at SAR 20–45 per m², and XPS boards at SAR 15–30 per m². Final figures depend on the survey, so please share the access details and any photographs when you request a visit.

Prices shown on this page come from our own published price list for the city; the final price is set after inspection.

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

The most common causes

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

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 — Al Aryja

Questions from Al Aryja

Common mistakes we see

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

The written outputs

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