Roof waterproofing for apartments in Alhait

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

Roof waterproofing in Alhait: the local context

The centre of Alhait sits about 980 m above sea level (SRTM open elevation data).

Before any material is chosen for a flat roof in Alhait, the technician starts by confirming the setting, because the town's height shapes what the roof has to handle. The centre of Alhait sits about 980 m above sea level (SRTM open elevation data), so the first checks are the roof's exposure to sun and wind, the condition of the parapet and drainage outlets, and any signs of water already tracking through the slab below. At this altitude the membrane is worked against strong daily temperature swings, which is why the existing surface is examined for blistering, splits and loose laps before any price is discussed. Liquid roof waterproofing usually falls in the range of SAR 8–25 per m², while a bitumen membrane runs from SAR 15–35 per m², so the surface check tells the team which of these routes, or an alternative such as XPS boards at SAR 12–30 per m², suits the roof in front of them.

Several things can only be settled on the site visit. The true area of each roof section is measured, along with the number and position of cracks, the fall towards the outlets and whether ponding forms after rain. The technician also records any rooftop equipment, water tanks, satellite fixings or access hatches that must be worked around, and confirms whether the building has a shared roof or separate roof rights for each flat. Where a crack runs along the slab, crack injection is priced at SAR 40–120 per metre, so the length is recorded accurately rather than estimated from the outside. Access, the building manager's approval and the timing of any noisy work are also agreed during the visit, not before it.

The information below helps the technician prepare and should be gathered when the visit is booked. Note the age of the building, any previous waterproofing and the name of the coating used, if known, and whether the residents have reported leaks in bathrooms or the flat below. If the roof stores water, the technician should know whether a tank sits on it, since tank internal coating is separately priced at SAR 25–60 per m² and needs its own assessment. Photographs of stains and of the roof surface, taken after rain, help the team plan the work before arriving. Keeping these details ready allows the technician to give a clear, site-specific proposal rather than a general estimate.

In apartment buildings, the floor below is often where a leak shows first.

Signs worth paying attention to

The following signs are worth checking before they grow:

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

The most common causes

• Wrong falls towards the drains — we check this before anything else.
• A common cause: damaged waterproofing around tank and AC bases.
• 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.

Alhait in facts and sources

Common questions about roof waterproofing in Alhait

Common mistakes we see

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

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.