Bitumen membrane in Qatif: before summer & rain season

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

Why bitumen membrane differs in Qatif

Qatif is about 2.5 km from the sea coast (OpenStreetMap). The centre of Qatif sits about 5 m above sea level (SRTM open elevation data).

Team note on Qatif: 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..

Qatif sits about 5 m above sea level at its centre, and the coast is roughly 2.5 km away, so the first things a technician checks on a bitumen membrane job here are drainage and exposure rather than elevation alone. Water tends to pool where the roof falls short, around outlets, parapets and upstand edges, and a membrane that looks sound in dry weather can fail there once the rain season arrives. Salt-laden air from the nearby coast also affects the surface, so the lap joints and the flashing at walls need close attention before any work begins. Pricing for this type of work runs from SAR 15 to SAR 35 per m², and a clear view of the roof's condition helps set the right scope from the start.

The detailed assessment is left to the site visit, where the technician walks the roof and records what the plan cannot show. This includes the current state of any existing membrane, whether it has blistered, cracked or lifted at seams, and whether the old layer should be removed or can be bonded over. The technician will check the slope, the position of drains and roof penetrations, and the condition of the concrete substrate, marking any cracks that may need crack injection, which is priced at SAR 40 to SAR 120 per metre. Where a roof is used for storage or water tanks, the site visit also notes access, the weight to be carried and any tank coating that may be needed, priced at SAR 25 to SAR 60 per m². The visit ends with a decision on whether the work can be completed before the rain season or should wait.

To help the technician arrive prepared, it is useful to have the building's age, the number of previous repairs and the date of the last waterproofing work ready to share. Note any past leaks, including the rooms affected and the season they appeared, since leaks in the rain season point to different causes than leaks in summer heat. Photographs of the roof taken after a rainfall, showing where water stands, are very helpful. Confirm access to the roof, the position of water tanks and any rooftop equipment that must be moved or protected. With this information in hand, the technician can plan the work around the weather and the building's daily use.

Checks before summer and before the rain season catch problems while they are still small.

Signs that call for bitumen membrane

These are the signs most often linked to bitumen membrane:

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

Where the problem usually comes from

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

How we choose the tool in Qatif

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.

Qatif in facts and sources

Common questions about bitumen membrane in Qatif

What we advise against

• 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.