Bitumen membrane in Aldarb: preventive periodic check

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

What is specific about Aldarb for bitumen membrane

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

An owner of a villa or small apartment block with a flat concrete roof in Aldarb often notices the problem only after the first leak stain appears on a ceiling below. By then, water has usually been travelling through the roof slab for some time, and the repair is more costly than the upkeep would have been. A periodic check of the bitumen membrane, carried out before the rainy months, is the simplest way to avoid that surprise.

The local facts shape how often and how carefully this should be done. Aldarb sits at roughly 79 m above sea level, so it is not a low-lying site where water collects in hollows, but the town is still about 18.7 km from the coast, which means the roof is exposed to strong sun and dry heat for much of the year. Heat and sun make bitumen soften, blister and lose its surface protection, while sudden storms push water into any small gap. For an owner, this means the membrane needs attention on its exposed surface and along its upturns, not only at the drains. Bitumen membrane itself is priced at SAR 15–35 per m², so a full replacement is a significant decision, which is why a regular inspection that catches early damage is worth the effort.

Start the check by walking the whole roof after a dry spell and marking any cracks, bubbles, bare patches or lifted edges with chalk. Next, clear leaves, sand and debris from the drains and outlets so water can leave quickly. Then examine the joints where the roof meets parapets, walls and rooftop fixtures, since these are the most common points of failure. Note the location of every defect and photograph it so changes can be tracked from one check to the next. Small cracks can be treated early, and crack injection work is priced at SAR 40–120 per metre, which is far less than repairing water damage inside the building. Finally, record the date and findings in a simple log, and schedule the next check before the rains begin.

Preventive checks follow a written schedule instead of waiting for a fault.

Signs that call for bitumen membrane

The following signs are worth checking before they grow:

• Old rolls that are cracking
• A flat concrete roof that needs waterproofing

Causes we see in the field

• Seams that were not welded properly — we check this before anything else.
• No protection layer — we check this before anything else.

How we choose the tool in Aldarb

How the work is done, step by step

1. Preparation: Cleaning, priming and repairs.
2. Torch welding: Overlaps are welded and checked.
3. Details: Upstands, drains and bases.
4. Protection and flood test: Protection is laid after a successful flood test.

Facts and costs — Aldarb

Common questions about bitumen membrane in Aldarb

Mistakes that cost more

• Leaving the membrane exposed without protection

The written outputs

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