Roof waterproofing for rest houses & farms in Jazan

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

What is specific about Jazan for roof waterproofing

Jazan is about 1.9 km from the sea coast (OpenStreetMap). The centre of Jazan sits about 7 m above sea level (SRTM open elevation data).

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..

Do rest houses and farms near Jazan really need roof waterproofing, and how do you know when it is due? The centre of Jazan sits about 7 m above sea level, and the city is about 1.9 km from the sea coast. That closeness to the coast means salty, humid air reaches roofs and walls, so a roof that looks sound from the ground can still let water in during the wet season. Liquid roof waterproofing is priced at SAR 8–25 per m², bitumen membrane at SAR 15–35 per m², and XPS boards at SAR 12–30 per m². Spray foam, at SAR 20–45 per m², is another option for flat roofs. Epoxy coating, at SAR 35–90 per m², suits surfaces that need a harder finish. Crack injection, at SAR 40–120 per metre, is used where a single split line is the only problem.

Once a visit is booked, the inspection starts with a walk across the full roof surface to look for ponding, lifted edges, and old patches that have started to fail. The technician then checks the parapets, drainage outlets, and the joints where the roof meets walls, since these are the most common routes for leaks. Any cracks are measured in metres so the repair can be priced accurately. If water tanks sit on the roof, the inside of the tank is checked too, and tank internal coating is quoted at SAR 25–60 per m². Where a rest house has a bathroom or a basement, those areas are inspected separately, with bathroom waterproofing at SAR 15–40 per m² and basement waterproofing at SAR 50–150 per m². The findings are then explained so you can choose which parts to treat first.

To make the visit efficient, clear the roof of loose items, furniture, and stored equipment so the surface is fully accessible. Note any past leaks, including where they appeared inside the house and in which season, because that history guides the inspection. Let the technician know the approximate roof area in square metres and the number of cracks you have seen, if you can estimate them. If the property has a water tank, empty it or tell the team in advance so the inside can be checked. Keep access keys for gates, rooftops, and any storage rooms ready, and make sure someone who knows the property is present during the visit.

Rest houses and farms often have long buried lines, tanks and irrigation that need separate tests.

Signs that call for roof waterproofing

The following signs are worth checking before they grow:

• Water pooling on the roof
• Stains on the top-floor ceiling after rain
• The old waterproofing is cracking

The most common causes

• Wrong falls towards the drains.
• A common cause: damaged waterproofing around tank and AC bases.
• Cracks in the roof slab.

Tools and methods, and when we use them

How the work is done, step by step

1. Survey: Falls, drains and the condition of the old layer are recorded.
2. Preparation: Cleaning and repairs before any new layer.
3. Primer: The base coat that the system needs.
4. Waterproofing layers and details: Corners, upstands and bases get their own detail.
5. Flood test: The roof is flooded and checked before it is covered.

Quick comparison: facts and costs in Jazan

Short answers for Jazan

Mistakes that cost more

• Ignoring the tank bases
• Covering the waterproofing before the flood test

What you receive

You receive: a quality record with photos and the flood-test result, in a technical report with a verification code.