Bathroom waterproofing for duplexes in Al Swydy, Riyadh

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

Why bathroom waterproofing differs in Al Swydy

The centre of Al Swydy is at 24.5912, 46.6730, about 13.6 km from the centre of Riyadh, with an approximate radius of 3.2 km. The approximate area shown on the map is centred here. The centre of Al Swydy sits about 619 m above sea level (SRTM open elevation data).

Al Swydy has both villas and apartment buildings. The nearest wadi channel is about 0.2 km from the centre of Al Swydy (OpenStreetMap).

Main roads in or near Al Swydy: Southern Ring Road, Al Suwaidi Tunnel, Al Suwaidi General Road.

Bathroom waterproofing work in Al Swydy starts with the location itself. The centre of Al Swydy sits at 24.5912, 46.6730, about 13.6 km from the centre of Riyadh, with an approximate radius of 3.2 km, and it sits about 619 m above sea level. The nearest wadi channel is about 0.2 km from the centre of Al Swydy, so the technician will look first at how water moves across the plot and whether run-off from outside could reach a ground-floor bathroom. Because the area has both villas and apartment buildings, the first check also separates a standalone duplex from a unit that shares walls, slabs and drainage with neighbours. Bathroom waterproofing is typically priced at SAR 15–40 per m², and that range is useful for comparing scope, though the actual figure depends on what the inspection finds.

Several things can only be judged at the site visit. The technician will test the existing floor falls and the outlet points, check for hairline cracks and where they run, and look for signs of old leaks such as staining under the wall tiles or softening at the skirting. The choice of system is also decided on site: spray foam (SAR 20–45 per m²), epoxy coating (SAR 35–95 per m²), or a bitumen membrane (SAR 15–35 per m²) each suits different substrates and wall heights. Where cracks are active, crack injection is priced at SAR 40–125 per metre, and that length is measured only once the cracks are mapped. If the bathroom sits over a space that is also treated, such as a basement, the basement rate of SAR 55–160 per m² applies to that area and is quoted separately.

To help the technician, it is worth sharing the age of the building, any previous repairs, the tiling and screed type, and a note of any leak that appeared after rain or after a neighbour's water use. Clear access to the bathroom, the floor above and the roof hatch shortens the visit. Mark the wet areas and indicate where the wall meets the shower tray. Keep the bathroom free of stored items and let the technician know whether the floor is still in use during the work, so the schedule and any temporary arrangements can be set before the first coat goes down.

In a duplex, the two floors often share lines, so tests are done floor by floor.

When do you need bathroom waterproofing?

The following signs are worth checking before they grow:

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

The most common causes

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

Tools and methods, and when we use them

From the first visit to the report

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 Swydy

Common questions about bathroom waterproofing in Al Swydy

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.