Roof thermal insulation for restaurants in Jazan

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

Before we start: what we know about Jazan

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).

A restaurant owner in Jazan often runs a kitchen that stays hot for long hours, with extraction fans, ovens and a busy dining room below a roof that takes the full force of the afternoon sun. Many owners notice that the upper floor or the staff area feels hotter than it should, and that cooling costs keep climbing through the warm months. They want the heat kept out of the space below without disrupting service, and they want to know which parts of the roof deserve attention first.

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 low-lying and close enough to the coast that salty, humid air is a constant presence on rooftops and external surfaces. For a restaurant roof, this points to choosing insulation and surface finishes that handle moisture well and do not trap it underneath. Insulation boards such as XPS, priced in the range of SAR 12–30 per m², are a common option for keeping heat out of the space below, while a liquid roof waterproofing layer at SAR 8–25 per m² can protect the surface that faces the sun and humid air. Where a flat roof is used for plant or storage, a bitumen membrane at SAR 15–35 per m² is another route to weigh against the upkeep it needs.

A practical sequence starts with a walk-over of the roof to note cracks, ponding areas, and any spots where the existing surface has lifted. Next, repair any cracks, with crack injection priced at SAR 40–120 per metre, so that moisture cannot reach the insulation later. Then decide the insulation layer, comparing the per-square-metre cost of XPS boards against spray foam at SAR 20–45 per m², and confirm the surface finish. Finally, schedule the work for cooler hours and quieter days so kitchen operations keep running, and ask for a clear measurement of the roof area before agreeing on a total cost.

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

Signs worth paying attention to

These are the signs most often linked to roof thermal insulation:

• The ceiling stays hot at night
• Strong heat on the top floor
• The AC runs for long hours in summer

Where the problem usually comes from

• A common cause: old insulation that has deteriorated.
• A common cause: no thermal insulation under the roof protection.

How we choose the tool in Jazan

The steps in order

1. Thermal survey: Hot areas of the roof are mapped.
2. Choosing the system: The material and thickness are agreed in the quote.
3. Installation: The layer is installed and protected.
4. Measurement and documentation: Thickness is measured at spread-out points.

Quick comparison: facts and costs in Jazan

Questions from Jazan

Mistakes that cost more

• Relying on reflective paint alone on an uninsulated roof

What you get after the work

You receive: the documented thickness, materials and batch numbers, in a technical report with a verification code.