Roof waterproofing for rest houses & farms in Almajmaah

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

Roof waterproofing in Almajmaah: the local context

The centre of Almajmaah sits about 720 m above sea level (SRTM open elevation data). Main roads in or near Almajmaah: King Abdullah Road, King Fahd Road, King Salman Road.

Team note on Almajmaah: 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..

Roof leaks are the most common problem we see on rest houses and farms in Almajmaah, and they usually start in the same place: small cracks and worn surface coatings that let rainwater seep into the structure over time. On a farm or a rest house, the roof is often wide, flat and exposed, so a small weakness can spread quickly across a large area before anyone notices a stain on the ceiling.

The local setting changes how we approach the job. The centre of Almajmaah sits about 720 m above sea level, so the area is higher and cooler than many parts of the Kingdom, but the same roof still takes strong sun during the day and sharp temperature swings between day and night. That movement stresses the surface, which is why we look closely at cracks and joints first. For a flat roof we often compare liquid roof waterproofing, typically SAR 8–25 per m², with bitumen membrane at SAR 15–35 per m², and spray foam at SAR 20–45 per m². Where there are specific cracks, crack injection is priced at SAR 40–120 per metre, and water tanks on the property can be treated with tank internal coating at SAR 25–60 per m². Insulated roofs may also use XPS boards at SAR 12–30 per m², which suit properties where heat as well as water is a concern.

Before the visit, it helps to have a few answers ready. Tell us the roof type, whether it is flat or sloped, and how old the existing covering is. Point out where water has appeared, including any cracks, ponding after rain, or damp patches on walls below, and mention whether the property has a basement, bathrooms, or a water tank that should be checked at the same time. Let us know if the roof is used for anything regular, such as storage or gatherings, since foot traffic affects the coating we recommend. Clear answers to these questions let the inspection focus on the real problem and give you a clearer picture of the options before any work begins.

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

Signs worth paying attention to

The following signs are worth checking before they grow:

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

Where the problem usually comes from

• A common cause: damaged waterproofing around tank and AC bases.
• Wrong falls towards the drains.
• Cracks in the roof slab — we check this before anything else.

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 Almajmaah

Common questions about roof waterproofing in Almajmaah

What we advise against

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

The written outputs

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