Roof waterproofing in Arar: when to call a technician

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

Why roof waterproofing differs in Arar

The centre of Arar sits about 553 m above sea level (SRTM open elevation data).

Arar sits about 553 m above sea level, which is a useful starting point for any roof assessment. At that height the desert air is dry and the sun is intense for much of the year, so the first things a technician checks are the condition of the existing surface, any cracks or blistering, and whether the membrane has lost its grip at the edges and upstands. Heat drives expansion and contraction, and over time that movement opens hairline cracks that let water track under the surface even when rain is rare. A technician will also ask how the roof drains, because standing water pooling in a low corner is the fastest way to shorten the life of any coating.

Several things can only be settled at the site visit. The technician needs to see the substrate with their own eyes, measure the actual roof area, and judge whether a liquid coating, a bitumen membrane, or spray foam suits the surface and its slope. Prices for liquid roof waterproofing typically fall between SAR 8 and SAR 25 per m², bitumen membrane between SAR 15 and SAR 35 per m², and spray foam between SAR 20 and SAR 45 per m², but where your roof lands in that range depends on what the inspection finds. Any crack that needs injecting is quoted per metre, at SAR 40–120 per m, so the length and depth of cracks must be measured on site before a figure can be given. Access, parapets and drainage outlets are also judged in person.

To help the technician arrive prepared, have the building's age, any previous waterproofing work, and the dates of any leaks ready to share. Note which rooms sit directly beneath the roof, and whether the leak appears after rain, after heavy sun, or both, as this points to different causes. Clear loose debris and furniture from the roof where possible, and tell the technician if there are rooftop tanks, since their coating is priced separately, at SAR 25–60 per m². Photographs of any damp patches taken over several days are very helpful. With this information in hand, the visit can focus on finding the cause rather than searching for it, and you will receive a clearer picture of the work needed.

Some signs can be watched for a few days; others need a technician straight away — the signs list above helps you decide.

When do you need roof waterproofing?

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

Causes we see in the field

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

Tools we use in Arar

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.

Facts and costs — Arar

Short answers for Arar

Mistakes that cost more

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

The written outputs

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.