Roof waterproofing for rest houses & farms in Tabarjal

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

Before we start: what we know about Tabarjal

Team note on Tabarjal: 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 Tabarjal sits about 548 m above sea level (SRTM open elevation data).

The first thing checked on a rest house or farm roof in Tabarjal is the altitude, because the centre of Tabarjal sits about 548 m above sea level, and that elevation shapes how water, wind and temperature act on an open roof. Before any product is discussed, the technician looks at how the roof drains and whether ponding has already begun at low points. Liquid roof waterproofing is priced at SAR 8–25 per m², while a bitumen membrane runs SAR 15–35 per m², so the choice between them is made with the roof's condition in mind rather than the cost alone. Spray foam at SAR 20–45 per m² and XPS boards at SAR 12–30 per m² are also weighed against the existing surface and how much load the roof must carry.

Some matters are left to the site visit, since they cannot be judged from a description. The technician needs to see the actual state of the roof surface, any cracks that may need crack injection at SAR 40–120 per metre, and whether the water tanks on the property will also need attention. A tank internal coating costs SAR 25–60 per m², and an epoxy coating on a walkable surface is SAR 35–90 per m², but neither can be quoted properly until the area and access are measured on the ground. Drainage outlets, parapets and the junction where the roof meets the walls are also inspected in person, because these are where leaks most often start.

To help the technician prepare, it is useful to have a rough sketch of the roof with its dimensions, the age of any existing waterproofing, and a note of any past leaks and the rooms beneath them. Information about which parts of the property are used for guests or livestock also helps, as it affects how quickly repairs must be finished. If there is a basement or bathroom linked to the roof problem, mention it at the outset, since basement waterproofing (SAR 50–150 per m²) and bathroom waterproofing (SAR 15–40 per m²) are separate jobs. Clear answers to these questions let the technician arrive ready to assess the roof properly on the first visit.

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

When do you need roof waterproofing?

If you notice one of these signs in Tabarjal, it is a good moment to talk to the team:

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

Where the problem usually comes from

• Wrong falls towards the drains.
• Damaged waterproofing around tank and AC bases — we check this before anything else.
• A common cause: 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 Tabarjal

Short answers for Tabarjal

Common mistakes we see

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

The written outputs

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