Roof waterproofing for hotels & serviced apartments in Alrass

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

Before we start: what we know about Alrass

Main roads in or near Alrass: King Abdulaziz Road, King Fahd Road, King Salman Road. The centre of Alrass sits about 695 m above sea level (SRTM open elevation data).

Team note on Alrass: 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 waterproofing work for hotels and serviced apartments in Alrass starts with the elevation. The centre of Alrass sits about 695 m above sea level (SRTM open elevation data), so the first things we check are how water drains off the roof and where it would collect during heavy rain. A flat roof that falls toward a single outlet, or a parapet that traps water at its base, tells us a great deal before any product is chosen. We also look at existing upstands, drain outlets and any roof-mounted tanks or plant, because these set the lines along which a membrane must run and seal.

Several points are left to the site visit, because they depend on what is actually on the roof. The technician needs to see the substrate condition, whether it is sound concrete, screed or an old bitumen layer, and whether there are blisters, cracks or ponding that will change the method. The age and type of any existing waterproofing, the number and position of penetrations such as pipes, vents and satellite mounts, and whether the roof is in active use by guests or staff all shape the work. Access routes, the presence of occupied rooms below, and any restrictions on working hours are also confirmed on site rather than assumed from a desk.

To help the technician prepare, it is useful to share the roof's approximate dimensions, the number of floors below, and any previous leak history with dates and locations. Photographs of ceiling stains inside the building, the position of roof drains, and any tank or basement areas that share a wall with the roof area are valuable. Note which systems the property has already used, such as liquid coatings, bitumen membranes or insulation boards, since this affects compatibility. Clear information on when rooms can be closed and who signs off the schedule will let the crew plan materials and access before arriving.

For hotels and serviced apartments, rooms are handled in batches to keep units available.

Signs worth paying attention to

If you notice one of these signs in Alrass, 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

The most common causes

• Wrong falls towards the drains — we check this before anything else.
• 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.

Facts and costs — Alrass

Short answers for Alrass

Common mistakes we see

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

What you get after the work

The written output: a quality record with photos and the flood-test result. The report is numbered and can be checked with its verification code.