Floor & balcony waterproofing in Khafji: cost & published offers

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

Before we start: what we know about Khafji

Main roads in or near Khafji: King Abdullah Road. 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..

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

Floor and balcony leaks in Khafji usually start at the joints and edges rather than in the middle of a slab. Hairline cracks where the floor meets a wall, around drains and at the threshold of a balcony door let water track down into the structure, and the damage often shows first as staining or flaking paint below. Because the problem is usually small and localised at the start, it is worth checking these weak points before deciding that the whole area needs treatment.

Khafji sits about 9 m above sea level, and the centre is about 2 km from the coast. That combination matters. Rain runs off the higher ground toward low points and drains, so balconies and floors with poor falls can hold water for longer than expected. Salt-laden air near the coast also works on exposed surfaces and fixings over time. For this reason, the approach here should focus on clean surface preparation, good falls to drains, and a membrane or coating that stays sound under both standing water and salty air. A crack injection, which is priced per metre, is often the right first step at a joint, while a full liquid or bitumen layer may be needed where the whole surface has lost its seal. Spray foam and XPS boards suit other situations, so the right choice depends on what is actually found on the day.

Before the visit, ask the provider to state the area being treated and the method proposed for each zone, such as liquid waterproofing, bitumen membrane, epoxy coating or crack injection, so you can compare them clearly. Ask how they will check the falls and drainage, what surface preparation is included, and whether any cracks will be injected separately and charged per metre. Request an itemised quote showing the rate per square metre or per metre for each item, and confirm what is excluded, such as tile removal or making good afterwards. Finally, ask how the work will be inspected before the area is returned to use. Clear answers on these points will show you whether the quote reflects the real condition of your floor and balcony.

Prices shown on this page come from our own published price list for the city; the final price is set after inspection.

Signs worth paying attention to

These are the signs most often linked to floor & balcony waterproofing:

• Damp under the light well
• A wrong fall towards the door threshold
• Water passing from the balcony to the floor below

The most common causes

• A blocked drain — we check this before anything else.
• Incorrect falls.
• A threshold without waterproofing — we check this before anything else.

How we choose the tool in Khafji

From the first visit to the report

1. Checking the falls: Where water collects and where it should go.
2. Details: Thresholds, drains and upstands.
3. Waterproofing: The layer is applied and protected.
4. Flood test: Tested before the finish goes on.

Facts and costs — Khafji

Questions from Khafji

Mistakes that cost more

• Tiling a balcony without waterproofing

What you get after the work

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