Roof waterproofing for duplexes in Abu Arish

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

Why roof waterproofing differs in Abu Arish

The centre of Abu Arish sits about 67 m above sea level (SRTM open elevation data). Team note on Abu Arish: Kashf teams serve this city and its nearby districts with the same documented inspection standard: device-based leak detection without demolition, a written report, and a clear scope before any work begins..

The most common roof problem in duplexes in Abu Arish is water getting in through old, cracked surfaces that were never properly sealed. Because each duplex shares a roof structure with its neighbour, a leak can affect both households and make it harder to tell where the water is coming from. Liquid roof waterproofing is usually the first option considered, and for many roofs it sits at SAR 8–25 per m², while a bitumen membrane runs SAR 15–35 per m². Choosing between them depends on the condition of the existing surface, not on price alone.

Abu Arish sits at about 67 m above sea level, which places it in a setting where roofs are exposed to direct sun and heat for long periods. This matters because heat cycles can open small cracks that later let water through. A good approach here starts with checking for cracks and checking joints around roof edges and drains, then deciding whether the fault is a small line that suits crack injection at SAR 40–120 per metre, or a wider surface problem better handled with a full membrane or coating. Insulation can also be part of the plan, and XPS boards at SAR 12–30 per m² are sometimes added where heat gain is a concern. The local height and climate are reasons to look closely at the surface before choosing a system.

Before the visit, ask the provider to explain which system they recommend for your roof and why, and to say whether they will inspect the joints and drains as well as the main area. Ask for the price range that applies to your roof, and confirm whether the figure is per square metre or per metre of crack. Ask how they will handle a shared roof if your duplex neighbour is affected, and who will be responsible for the work. Finally, ask what they will check on the day, so you know the visit will focus on the actual cause of the leak rather than simply covering the surface.

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

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

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 — we check this before anything else.

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.

Quick comparison: facts and costs in Abu Arish

Common questions about roof waterproofing in Abu Arish

Mistakes that cost more

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

What you get after the work

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