Floor & balcony waterproofing in Najran: before buying or handover

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

Floor & balcony waterproofing in Najran: the local context

Team note on Najran: 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 Najran: Al Jarba Street.

The centre of Najran sits about 1309 m above sea level (SRTM open elevation data).

An owner in Najran who is buying a flat or a villa with a balcony, or taking over a newly finished unit, often focuses on the paint, tiles and fittings and leaves the floor and balcony until a leak appears. By then, water has already found its way into the slab edges, the railing joints or the corners where the floor meets the wall. The first signs are usually small: a stain on the ceiling below, a damp patch near the sliding door, or tiles that sound hollow when tapped.

The centre of Najran sits about 1309 m above sea level, which matters more than it first seems. At that elevation the city experiences a wide daily temperature swing, so surfaces expand and contract through the day and night. This movement is a common reason hairline cracks open up in floors and balcony slabs. Rain, though not frequent, tends to arrive in short, heavy bursts, so the water that gathers on a balcony needs a sound drainage path and a sealed surface to avoid soaking into the concrete. For owners, this means that a balcony or floor which looks sound on handover still deserves a close check before the first rainy season arrives.

Start by walking the floor and balcony in daylight and marking any crack, hollow tile or soft patch with chalk. Ask the seller or developer for records of any waterproofing already applied and check whether it covers the balcony edges and drain outlets. Where you find cracks, get the crack repaired by injection before any surface work, and price it per metre, since typical rates for this work fall between SAR 40 and SAR 120 per m. For balcony roofs or exposed slabs, a liquid roof system at SAR 8–25 per m² or a bitumen membrane at SAR 15–35 per m² are common options, and you should compare the coverage each offers. Finally, once the repairs are done, test the surface with a controlled hose test before furniture or tiles are fixed in place, and keep the written scope and the photos for your records.

Before buying or taking over a property, an inspection gives you findings in writing before you sign.

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

Causes we see in the field

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

How we choose the tool in Najran

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.

Najran in facts and sources

Short answers for Najran

Mistakes that cost more

• 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.