Roof waterproofing in Aldarb: cost & published offers

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

What is specific about Aldarb for roof waterproofing

The centre of Aldarb sits about 79 m above sea level (SRTM open elevation data). Aldarb is about 18.7 km from the sea coast (OpenStreetMap).

Roof waterproofing in Aldarb begins with the location itself. The centre of Aldarb sits about 79 m above sea level (SRTM open elevation data), and the town is about 18.7 km from the sea coast (OpenStreetMap). These two facts shape how a roof is checked: it is not a coastal, salt-exposed setting, but a raised inland one, so the first questions concern how water runs off the roof surface and whether the drainage outlets are clear and sloped correctly. Before any price is discussed, the technician looks at the roof's falls, outlets and any ponding areas, because standing water is the most common cause of early failure on a flat roof.

The published offers for this work cover a range of systems, and the right one depends on what is found on the roof. Liquid roof waterproofing is listed at SAR 8–25 per m², bitumen membrane at SAR 15–35 per m², and XPS boards at SAR 12–30 per m². Where the roof has cracks, crack injection is priced at SAR 40–120 per metre, and spray foam at SAR 20–45 per m². Epoxy coating is listed at SAR 35–90 per m². These figures are starting points only. The final choice, and therefore the final cost, is set on site once the roof's condition, its size and the access arrangements are known.

Several points are left to the site visit rather than settled by a price list. The technician checks the substrate for moisture, loose screed, old coatings that need removing, and the condition of parapets, upstands and penetrations such as pipes and vents. The exact area is measured on the roof itself, not estimated from a plan. Where a water tank sits on the roof, its internal coating is a separate item, listed at SAR 25–60 per m², and its condition is assessed separately. Information that helps the technician includes the age of the roof, any past leaks and where they appeared, whether the roof is used for storage or as a terrace, and any previous repair records. Sharing these details at the first contact allows a more accurate inspection and a clearer proposal.

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

Signs worth paying attention to

These are the signs most often linked to roof waterproofing:

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

The most common causes

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

How we choose the tool in Aldarb

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.

Aldarb in facts and sources

Questions from Aldarb

Mistakes that cost more

• 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.