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

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

Before we start: what we know about Alnuayriyah

The centre of Alnuayriyah sits about 49 m above sea level (SRTM open elevation data). Main roads in or near Alnuayriyah: King Abdulaziz Road.

Team note on Alnuayriyah: 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..

The centre of Alnuayriyah sits about 49 m above sea level, according to SRTM open elevation data. That is not a high point, but it is high enough that the ground here drains reasonably well, and the streets and plots do not sit in a natural hollow where rainwater pools for long. For a floor or balcony service, the practical effect is that the water we are protecting against usually arrives from above rather than from below. Balconies, roof edges and terrace slabs take the direct hit, so the work focuses on the surfaces that sit under open sky and on the joints where those surfaces meet walls and drains.

Because the area is built up and the rainfall is short but heavy when it comes, the surfaces most at risk are the ones that stay wet longest. Balconies with flat falls and blocked outlets hold water against the edge, and that water finds its way into hairline cracks at the slab-to-wall junction. Before any coating goes on, the crew checks falls, clears outlets and marks every crack for injection. Liquid roof waterproofing, priced at SAR 8–25 per m², and bitumen membrane, at SAR 15–35 per m², are the two systems most often chosen for open balconies and roof slabs, while XPS boards at SAR 12–30 per m² suit insulated roof decks where thermal load is a concern. The choice depends on how the surface moves and how much foot traffic it carries, and our surveyor will explain the reasoning on site before anything is quoted.

Owners in Alnuayriyah tend to avoid a handful of mistakes that cause early failure. The first is coating over a damp or dusty surface, which stops the new layer from bonding and lifts within a season. The second is skipping crack injection and relying on a surface coat alone, so the movement simply reopens the crack underneath. The third is ignoring the drain and the upstand at the wall, where most leaks start; sealing these properly costs little compared with repairing water damage in the rooms below. The fourth is treating a balcony as cosmetic, when its membrane does the same job as a roof membrane. Scheduling the work before summer, when surfaces are dry and cure times are predictable, lets each of these points be checked before the heat arrives.

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

Signs that call for floor & balcony waterproofing

The following signs are worth checking before they grow:

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

Where the problem usually comes from

• A common cause: a threshold without waterproofing.
• A common cause: incorrect falls.
• A common cause: a blocked drain.

Tools and methods, and when we use them

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.

Alnuayriyah in facts and sources

Questions from Alnuayriyah

Common mistakes we see

• Tiling a balcony without waterproofing

What you receive

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