Floor & balcony waterproofing in Yanbu: before summer & rain season

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

Before we start: what we know about Yanbu

Team note on Yanbu: 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 Yanbu: King Abdulaziz Road, Umluj Road, Al Hanan Street.

The centre of Yanbu sits about 6 m above sea level (SRTM open elevation data). Yanbu is about 1.2 km from the sea coast (OpenStreetMap).

Yanbu sits about 6 m above sea level, and the city's coastline is only about 1.2 km away. For floors and balconies, this means salt-laden air and the moisture that comes with it are a constant presence, not an occasional one. Surfaces near the coast are exposed to humid air that can settle on tiles, concrete and metal railings, so a waterproofing layer that is not properly bonded to the substrate can allow moisture to creep underneath over time. Our survey begins with a check of the substrate and its exposure, so that the right system is chosen for the actual conditions on your floor or balcony.

The short distance to the sea also shapes how we approach drainage and detailing. Because the city centre is low-lying, rainwater can collect on flat balconies and roof slabs and find its way into joints and cracks. We therefore pay particular attention to falls, outlets and the edges where the membrane meets walls and railings. Where cracks are present, crack injection is often the first step, priced per metre, before any surface system is applied. For larger areas, liquid roof waterproofing and bitumen membranes are commonly used, with prices quoted per square metre so you can see the cost of each section before work begins.

Owners in Yanbu tend to avoid several common mistakes. The first is applying a coating to a damp or dusty surface, which prevents proper adhesion and leads to blistering. The second is ignoring small cracks, which grow with temperature changes and let water in at exactly the points that were supposed to be sealed. A third is treating balconies and bathrooms as minor jobs and leaving their junctions unsealed, even though these are where water most often finds a way through. Finally, many owners wait until the first heavy rain or the hottest weeks of summer to act. Scheduling the work before summer and the rainy season gives the materials time to cure properly and protects the floor beneath, which is far less costly than repairing damage after water has already entered.

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

When do you need floor & balcony waterproofing?

The following signs are worth checking before they grow:

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

Where the problem usually comes from

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

Tools we use in Yanbu

How the work is done, step by step

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 — Yanbu

Short answers for Yanbu

What we advise against

• Tiling a balcony without waterproofing

The written outputs

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