Bitumen membrane for apartments in Khafji

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

Bitumen membrane in Khafji: the local context

Team note on Khafji: 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.. Main roads in or near Khafji: King Abdullah Road.

The centre of Khafji sits about 9 m above sea level (SRTM open elevation data). Khafji is about 2 km from the sea coast (OpenStreetMap).

Is a bitumen membrane worth it for an apartment building in Khafji? For many owners the first question is whether the town's location makes a difference. The centre of Khafji sits about 9 m above sea level (SRTM open elevation data), and the town is about 2 km from the sea coast (OpenStreetMap). That means a coastal setting with modest height above the water, so moisture and salt exposure on roofs and below-ground walls deserve a careful look. A bitumen membrane is one option among several, and it is priced at SAR 15–35 per m², which places it in the middle of the range for roof and wall waterproofing work.

Before any work is quoted, the inspection should follow a clear sequence. Start with the roof and any exposed slabs, checking for ponding, cracks, and old membrane that has lifted or blistered. Then move to the walls and joints, looking for damp patches and hairline cracks. Where a crack is visible, it is measured by length, since crack injection is priced at SAR 40–120 per metre. Note which areas are below ground level and which are in wet rooms, because basement waterproofing (SAR 50–150 per m²) and bathroom waterproofing (SAR 15–40 per m²) are separate scopes. The inspector should record each area's measurements so the owner can compare the membrane option against the alternatives on the same basis.

Preparation makes the visit far more useful. Gather any previous waterproofing records, the building's floor plans, and notes on when leaks were first noticed and where they appear after rain. Clear access to the roof hatch, the stairwell, and the affected flats, and ask residents to report active damp in advance. If the building has a water tank, make sure the tank can be reached for an internal coating assessment, which is priced at SAR 25–60 per m². Having these details ready lets the inspector focus on the real problem areas and gives you a clear basis for deciding which work to approve.

In apartment buildings, the floor below is often where a leak shows first.

Signs that call for bitumen membrane

These are the signs most often linked to bitumen membrane:

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

Where the problem usually comes from

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

Tools we use in Khafji

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.

Quick comparison: facts and costs in Khafji

Short answers for Khafji

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.