Roof waterproofing for apartments in Unaizah

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

What is specific about Unaizah for roof waterproofing

The centre of Unaizah sits about 667 m above sea level (SRTM open elevation data). Team note on Unaizah: 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 leaks in apartment buildings usually start small. A hairline crack in the screed, a blocked outlet or a lifted edge lets water track into the top floor, and by the time staining appears on a ceiling the problem has often been growing for months. In Unaizah, the most common complaint from apartment owners is exactly this: water entering through the roof slab during heavy rain, with the damage showing up in the flat directly below. Because the roof is shared by every unit in the block, a leak that goes unaddressed can affect several households at once.

Unaizah sits at about 667 m above sea level, which shapes how a roof should be treated. Rain arriving at this height, combined with strong daytime heat that expands and contracts the roof surface, puts repeated stress on the membrane and on any joints. For this reason, a roof repair here usually means choosing a system that can flex with those temperature swings, rather than a rigid patch. Liquid roof waterproofing, priced at SAR 10–25 per m², is often suitable for flat roofs with moderate exposure, while bitumen membrane at SAR 15–35 per m² is commonly used where a thicker, more durable layer is needed. Where the roof also carries insulation, XPS boards at SAR 10–30 per m² can be added to limit heat transfer into the apartments below, which matters in the warmer months.

Before booking a visit, ask the provider a few direct questions. Ask whether they will inspect the roof surface, outlets, parapets and any cracks, and whether they will check the flat directly beneath for signs of moisture. Ask which system they recommend and why it suits your roof, and request a written breakdown of the area being treated and the rate per m² for each stage. Confirm who is responsible for the work on a shared roof and whether the building management needs to approve access. Finally, ask how the area will be prepared and how long the roof should be kept clear of foot traffic after completion.

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

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

• 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.
• Wrong falls towards the drains — we check this before anything else.
• Cracks in the roof slab — we check this before anything else.

How we choose the tool in Unaizah

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.

Unaizah in facts and sources

Questions from Unaizah

What we advise against

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

What you receive

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.