Bathroom waterproofing for villas in Al Nkhyl, Riyadh

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

Before we start: what we know about Al Nkhyl

The centre of Al Nkhyl is at 24.7422, 46.6375, about 5 km from the centre of Riyadh, with an approximate radius of 3.9 km. The approximate area shown on the map is centred here. Main roads in or near Al Nkhyl: King Fahd Road, Imam Saud bin Abdulaziz bin Mohammed Road, Al Takhassusi Road.

The nearest wadi channel is about 1.4 km from the centre of Al Nkhyl (OpenStreetMap). Al Nkhyl has both villas and apartment buildings.

The centre of Al Nkhyl sits about 622 m above sea level (SRTM open elevation data).

Bathroom waterproofing work in Al Nkhyl, Riyadh, starts with a look at the site's position, because it shapes what a technician checks first. The centre of Al Nkhyl sits at 24.7422, 46.6375, about 5 km from the centre of Riyadh, and it sits about 622 m above sea level. The nearest wadi channel is about 1.4 km from the centre of the district, so surface run-off and ground moisture are part of the picture when water tries to find its way into a villa. Because Al Nkhyl has both villas and apartment buildings, a technician will pay attention to how a villa's floors, walls and drainage connect to the ground below, not only to the bathroom surface itself. Rates for bathroom waterproofing in the district typically fall within SAR 15–40 per m², with epoxy coating at SAR 35–95 per m² and spray foam at SAR 20–45 per m² as common alternatives.

Some things can only be settled on the site visit. The technician will walk the bathroom and the rooms around it, sound the tiles, look for hairline cracks, and judge whether crack injection at SAR 40–125 per metre is needed before any new layer goes down. They will decide between a bitumen membrane at SAR 15–35 per m² and an XPS board approach at SAR 15–30 per m², based on the substrate and the floor build-up they find. If the bathroom sits above a basement, the basement waterproofing rate of SAR 55–160 per m² may come into the discussion, and that is only confirmed once the site is open. Any tank or roof connection raises its own questions, including tank internal coating at SAR 25–65 per m² and liquid roof waterproofing at SAR 10–25 per m², and these are assessed in person rather than assumed.

To help the technician arrive prepared, it is useful to have the following ready: the approximate floor area of each bathroom, the age of the building and any earlier waterproofing work, photos of any damp patches or stains, and a note of where water appears after rain or after use. Please keep access to the bathroom clear, including the ceiling space or shaft if it is reachable, and tell us whether the bathroom is in a villa or an apartment block so the right scope can be prepared. With these details, the visit can focus on the actual cause of the problem rather than on guesswork.

In a villa, tanks, the roof and the yard lines are usually yours to look after, so it helps to know where the main valve and tank hatches are.

Signs that call for bathroom waterproofing

The following signs are worth checking before they grow:

• Worn grout
• A stain under the bathroom on the floor below
• Damp around the shower

Causes we see in the field

• The area around the floor drain — we check this before anything else.
• A common cause: corners without waterproofing tape.
• A damaged floor layer — we check this before anything else.

How we choose the tool in Al Nkhyl

The steps in order

1. Finding the source: A supply-pipe leak is ruled out first.
2. Preparation: The floor is opened and cleaned where needed.
3. Corners and details: Tape and detailing at corners, drains and pipe entries.
4. Flood test: The floor is tested before tiling.

Quick comparison: facts and costs in Al Nkhyl

Common questions about bathroom waterproofing in Al Nkhyl

Common mistakes we see

• Waterproofing the floor while the supply pipe still leaks

The written outputs

The written output: the flood-test result and photos of each stage. The report is numbered and can be checked with its verification code.