Roof waterproofing for villas in Al Mlz, Riyadh

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

Why roof waterproofing differs in Al Mlz

The centre of Al Mlz is at 24.6561, 46.7275, about 8.3 km from the centre of Riyadh, with an approximate radius of 2.8 km. The service-area circle on the map below is drawn from this point. Main roads in or near Al Mlz: University Street, Salah al-Din al-Ayyubi Road, Omar bin al-Khattab Road.

Al Mlz is mainly apartment buildings. The centre of Al Mlz sits about 592 m above sea level (SRTM open elevation data).

Does a villa roof in Al Mlz really need waterproofing, and what does it cost? Al Mlz sits about 8.3 km from the centre of Riyadh, with its centre at 24.6561, 46.7275 and an approximate radius of 2.8 km. The area is mainly apartment buildings, so many owners of villas here find that roof work is a different job from what they are used to. Roof waterproofing is priced per square metre, and the rates for liquid roof waterproofing run from SAR 10–25 per m², while bitumen membrane runs from SAR 15–35 per m². Spray foam sits at SAR 20–45 per m², and XPS boards at SAR 15–30 per m². Your choice of system depends on the roof's condition and how it is used.

A visit to inspect a villa roof usually begins by walking the full surface to look for ponding, blistering, cracks and old repairs. The inspector checks the joints around parapets, drains and rooftop fixtures, since these are the points where water most often gets in. Where cracks are visible, the cost of crack injection is set per metre, at SAR 40–125 per m, so the length of each crack is measured. Next, the inspector notes the condition of any existing membrane and decides whether it can be overlaid or must be removed. The result is a written scope that lists the area in square metres and each linear metre of crack work, so you can compare the quote against the rates above.

Before the visit, clear the roof of stored items, loose tiles and garden pots so the surface can be fully checked. Note any past leaks, the rooms they affected, and the dates they happened, because this history guides the inspector's checks. Measure the roof's approximate area in square metres if you can, and list any cracks or wet patches you have already seen. If the villa has a basement or water tanks, mention these too, since basement waterproofing costs SAR 55–160 per m² and tank internal coating costs SAR 25–65 per m². Having this information ready lets the visit cover the whole property in one trip.

Villas often have several lines and tanks; we test them one at a time so the cause is clear.

When do you need roof waterproofing?

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

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

Causes we see in the field

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

How we choose the tool in Al Mlz

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 — Al Mlz

Short answers for Al Mlz

Mistakes that cost more

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

What you receive

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