Roof waterproofing in Aljumum: cost & published offers

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

Before we start: what we know about Aljumum

Team note on Aljumum: 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.. The centre of Aljumum sits about 200 m above sea level (SRTM open elevation data).

Roof waterproofing in Aljumum starts with the ground itself. The centre of Aljumum sits about 200 m above sea level (SRTM open elevation data), so roofs here are exposed to a dry, open climate where sun and temperature swings matter as much as rain. Before any price is discussed, the technician checks the roof surface for cracks, ponding areas, and old membrane that has lifted or blistered. Liquid roof waterproofing is typically priced at SAR 8–25 per m², while bitumen membrane runs SAR 15–35 per m², so the choice of system is usually decided by what the existing surface can hold.

The final method, the exact area to be covered, and any repair work can only be confirmed at the site visit. The technician measures the roof, notes parapets, drains, and roof penetrations, and checks whether old layers need removal. Crack repairs are priced separately at SAR 40–120 per metre, so the number of cracks and their length will change the total. Where a roof is connected to other areas, such as a bathroom above or a water tank beside it, the technician also looks at those points. Bathroom waterproofing is quoted at SAR 15–40 per m², and tank internal coating at SAR 25–60 per m², so these items should be listed clearly. XPS boards at SAR 12–30 per m² and spray foam at SAR 20–45 per m² may also be suggested depending on the roof structure and access.

To help the technician prepare, the homeowner should provide any previous waterproofing invoices, a note of where leaks have appeared and when, and access details for the roof and water tank. Mention whether the roof is used as a terrace, as this affects the surface finish chosen. Photos of leak marks inside the building are useful, especially after rain. Confirm whether the quote will cover only the roof or also the tank and bathroom. Clear information at this stage keeps the site visit short and the quote accurate, which is the purpose of this checklist.

Prices shown on this page come from our own published price list for the city; the final price is set after inspection.

When do you need roof waterproofing?

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

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

The most common causes

• Cracks in the roof slab.
• A common cause: wrong falls towards the drains.
• Damaged waterproofing around tank and AC bases.

How we choose the tool in Aljumum

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.

Quick comparison: facts and costs in Aljumum

Short answers for Aljumum

Mistakes that cost more

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

The written outputs

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