Bitumen membrane in Aldarb: emergency

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

Why bitumen membrane differs in Aldarb

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).

An owner of a flat or villa roof in Aldarb often notices a problem only after a heavy shower: a stain on the ceiling, a damp patch above a stairwell, or water pooling where the parapet meets the roof. The roof may have been covered with a bitumen membrane years ago, and the first sign of trouble can feel sudden, especially when the rain arrives without much warning. For a homeowner, the priority in that moment is to stop water entering the living space and to limit further damage to finishes and fittings.

The local facts shape what to expect. Aldarb sits about 79 m above sea level and roughly 18.7 km inland from the coast, so it is not in a low-lying hollow where water collects from the surrounding ground. That means that when a roof leaks, the cause is more often the membrane itself, an open joint, or a blocked drain than water rising from below. For bitumen membrane, the typical cost range is SAR 15–35 per m², so a leak that spreads across a large area can quickly become a significant expense. Where the damage is limited to a crack or a single joint, the price can be far lower, and a crack along a roof edge may be priced per metre at SAR 40–120 per m. Knowing these ranges helps an owner decide whether a targeted repair will do or whether the whole surface needs attention.

Start by clearing standing water from the roof surface, and make sure the outlets and drains are free of debris so water can run off. Move furniture, rugs and stored items away from the damp area below and place buckets or sheeting to catch drips. Photograph the stains and the affected areas before you do anything else, since this record will be useful when you discuss the work. Next, look for the likely entry point, such as a split in the membrane, a lifted edge at the parapet or a crack where the surface meets an upstand, and mark it with chalk. Once the source is identified, arrange a site visit with a contractor who can measure the affected area and confirm whether a patch repair or a wider membrane replacement is needed. Ask for the work to be described per square metre or per metre so that quotes can be compared on the same basis.

If water is flowing, close the main valve first, then call or message with photos.

When do you need bitumen membrane?

If you notice one of these signs in Aldarb, it is a good moment to talk to the team:

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

The most common causes

• A common cause: no protection layer.
• A common cause: seams that were not welded properly.

Tools and methods, and when we use them

From the first visit to the report

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.

Quick comparison: facts and costs in Aldarb

Short answers for Aldarb

Mistakes that cost more

• Leaving the membrane exposed without protection

What you receive

The written output: photos of the welds and the flood-test result. The report is numbered and can be checked with its verification code.