Floor & balcony waterproofing for restaurants in Jazan

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

Floor & balcony waterproofing in Jazan: the local context

Team note on Jazan: 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 Jazan sits about 7 m above sea level (SRTM open elevation data).

Jazan is about 1.9 km from the sea coast (OpenStreetMap).

An owner of a restaurant with a floor and balcony that need waterproofing usually notices the problem first as a stain, a soft patch of tile, or water running under a kitchen wall after a heavy rain. Dining areas and outdoor terraces take constant foot traffic, spilled liquids, kitchen cleaning water and hot cooking heat, so a surface that looked fine when the restaurant opened can slowly lose its seal. By the time guests see damp marks, the water has often already reached the slab below.

The local facts matter here. The centre of Jazan sits about 7 m above sea level, and the city is about 1.9 km from the sea coast. That means the site is close enough to the coast for salt-laden air and humidity to affect outdoor surfaces, while sitting low enough that rainwater and wash-down water have fewer natural paths to drain away quickly. For a restaurant balcony or terrace, this combination favours a continuous, well-bonded waterproof layer with good falls toward drains, rather than a thin decorative finish that traps moisture underneath.

Practical steps for a restaurant owner usually follow a clear order. First, survey the floor and balcony to locate cracks, blistered tiles, and areas where water pools, and mark every drain and upstand. Second, repair any cracks, since crack injection is priced per metre and should be done before any surface membrane is laid. Third, choose the system to suit the surface: liquid roof waterproofing and bitumen membrane suit exposed outdoor areas, while epoxy coating or spray foam can be considered for indoor kitchen and service floors where a seamless finish is needed. Fourth, have the surface prepared, primed and cured according to the system chosen, and keep foot traffic off until it is fully set. Finally, carry out a simple water test after completion and keep a record of the work for future maintenance.

For restaurants, visits are planned outside service hours and recorded for the premises file.

Signs worth paying attention to

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

Causes we see in the field

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

Tools we use in Jazan

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.

Quick comparison: facts and costs in Jazan

Short answers for Jazan

Common mistakes we see

• 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.