Roof waterproofing in Khafji: for companies (annual contract)

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

Before we start: what we know about Khafji

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).

A facilities manager at a mid-sized company in Khafji oversees a low office block and a small warehouse, both with flat concrete roofs. Like many owners in the town, they want the roof kept dry through the year without having to arrange a new repair every season. They prefer one arrangement covering the whole property, with a single point of contact and a clear schedule, rather than calling a contractor each time water appears on a ceiling.

Khafji sits about 9 m above sea level and roughly 2 km from the coast, so its roofs are not in a low-lying flood zone, but they are still close enough to the sea to be exposed to salty, humid air that wears down surface coatings over time. For a company owner, this means the roof should be inspected and maintained on a regular cycle rather than left until a leak appears. The liquid roof waterproofing option, priced at SAR 8–25 per m², suits large flat areas, while the bitumen membrane at SAR 15–35 per m² gives a heavier, more durable layer for roofs that carry plant or foot traffic. Crack injection, at SAR 40–120 per metre, is often the first job when older roofs show hairline cracks at parapets and joints. Spray foam, at SAR 20–45 per m², and XPS boards, at SAR 12–30 per m², can also be considered where insulation is needed alongside the waterproofing.

Under an annual contract, the work usually follows a clear order. First, the roof is surveyed to map cracks, ponding areas, drains, parapets and any existing membrane that has lifted. Second, the surveyed defects are repaired, starting with crack injection and drain clearing, so the surface is sound before any new layer goes on. Third, the chosen coating or membrane is applied to the agreed areas, with the scope and rates set out in the contract. Fourth, the roof is checked after each season, and any small damage is logged and fixed before it spreads. Keeping a written record of each visit gives the company a clear history of the roof and makes budgeting for the year straightforward.

For companies, an annual contract sets the scope, the visit schedule and the reports in writing.

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.
• Damaged waterproofing around tank and AC bases — we check this before anything else.
• Wrong falls towards the drains.

How we choose the tool in Khafji

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.

Khafji in facts and sources

Short answers for Khafji

Common mistakes we see

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

What you receive

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