Roof waterproofing for apartments in Al Yrmwk, Riyadh

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

What is specific about Al Yrmwk for roof waterproofing

The centre of Al Yrmwk is at 24.8085, 46.7835, about 15.2 km from the centre of Riyadh, with an approximate radius of 3.2 km. The service-area circle on the map below is drawn from this point. The centre of Al Yrmwk sits about 598 m above sea level (SRTM open elevation data).

Main roads in or near Al Yrmwk: Dammam Road, Sheikh Jaber Al-Ahmad Al-Sabah Road, Imam Abdullah bin Saud bin Abdulaziz Road.

Is a leaking apartment roof in Al Yrmwk something I can fix without tearing up the whole slab? For most owners in this district, the answer begins with the right system for the right surface. Al Yrmwk sits at 24.8085, 46.7835, roughly 15.2 km from the centre of Riyadh, within an approximate radius of 3.2 km, and its centre lies about 598 m above sea level. Liquid roof waterproofing is priced at SAR 10–25 per m², and bitumen membrane at SAR 15–35 per m², so a roof can be sealed with a membrane suited to its condition and budget. Where cracks are the source of water entry, crack injection is priced at SAR 40–125 per metre, and spray foam at SAR 20–45 per m² is another option for certain surfaces. Insulation boards such as XPS, at SAR 15–30 per m², can also be part of a roof improvement plan.

A site inspection normally starts with a walk across the full roof to map cracks, blisters, ponding areas and the condition of parapets, drains and outlets. The inspector then checks the junctions where the roof meets walls, rooftop water tanks and any penetrations for pipes or ducts, since these are common entry points for water. Moisture is noted on the ceilings below, especially in the top-floor apartments, so the source can be traced rather than guessed. The surface is tested for cleanliness and dryness, because most coatings and membranes need a sound base to bond properly. The inspector will then describe which areas need crack injection, which need a full membrane, and whether the tank interior also needs a separate coating, with each item priced by its unit rate.

Before the visit, gather any earlier repair records, a note of when leaks first appeared and which rooms were affected, and photos taken after rain if you have them. Clear the roof of loose items, plants and stored materials so the full surface can be reviewed, and make sure access to the roof and any water tanks is open. Tell the inspector about any previous coatings, as old layers can affect how new materials adhere. Having the building's roof and tank details ready helps the inspection finish in one visit, and lets you compare the unit rates against a clear scope of work.

In an apartment, a problem may start in your unit or in a shared line; we separate the two before any work.

Signs that call for roof waterproofing

These are the signs most often linked to roof waterproofing:

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

Causes we see in the field

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

Tools and methods, and when we use them

The steps in order

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 Yrmwk

Questions from Al Yrmwk

What we advise against

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

What you get after the work

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