Bitumen membrane in Aljumum: without breaking
In short: In Aljumum (Aljumum), bitumen membrane (without breaking) begins with the roof, falls and drains survey and the flood test; nothing is opened until the position is clear. The centre of Aljumum sits about 200 m above sea level (SRTM open elevation data). Pricing starts from Bitumen membrane (per m²) (SAR 15–35 per m²), and other items are quoted after the visit.
Why bitumen membrane differs in Aljumum
The centre of Aljumum sits about 200 m above sea level (SRTM open elevation data). 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..
Will a bitumen membrane on my roof in Aljumum crack open if the job is done without care? The answer depends on the surface underneath and the way the membrane is laid, not on the material alone. Aljumum sits about 200 m above sea level, so the roofs here are exposed to strong sun and sudden temperature swings. A bitumen membrane priced at SAR 15–35 per m² is a practical choice for flat roofs, but it only performs well when the base is sound and the layers are bonded properly. Shortcuts at this stage are what lead to blisters, lifting edges, and leaks that appear months later.
Before any material goes down, the installer should walk the roof and check the substrate for cracks, loose screed, old ponding marks, and blocked outlets. Drains and outlets are checked for flow, upstands at walls are inspected for height and condition, and any old membrane is assessed to decide whether it can stay or must be removed. Cracks that are wider than a hairline are noted for separate treatment, since crack injection is priced separately at SAR 40–120 per metre. Moisture in the screed is tested as well, because trapped water beneath a new membrane can push it up in hot weather. The inspection ends with a written list of what must be repaired first, so the membrane is laid over a surface that is ready for it.
To make the visit efficient, have the roof access open and clear of stored items, and make sure the roof hatch or stair key is available on the day. Note any past leaks, including the rooms below where stains appeared and the season they occurred, since this helps the inspector find the source. Gather any earlier waterproofing records, warranty papers, or photos showing the roof before repairs. Clear the rooftop of satellite fittings, water tanks, or planters around the perimeter, or tell the inspector in advance so they can plan access. Keep pets and children away from the roof during the walk, and let the building neighbours know the work will need access to shared areas if the roof is shared.
The aim is to locate the cause with instruments first, so any opening is limited to one point.
Signs worth paying attention to
These are the signs most often linked to bitumen membrane:
- A flat concrete roof that needs waterproofing
- Old rolls that are cracking
Causes we see in the field
- A common cause: no protection layer.
- Seams that were not welded properly.
Tools we use in Aljumum
| Tool or method | What it measures | Why it is chosen here |
|---|---|---|
| Roof, falls and drains survey | Ponding areas and the condition of the old layer | Limits: shows the condition, not the material alone |
| Flood test | Whether the waterproofing holds before it is covered | Limits: for roofs with drains and wet areas before tiling |
The steps in order
- Preparation: Cleaning, priming and repairs.
- Torch welding: Overlaps are welded and checked.
- Details: Upstands, drains and bases.
- Protection and flood test: Protection is laid after a successful flood test.
Facts and costs — Aljumum
| Item | Value | Source |
|---|---|---|
| District profile | 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. | Kashf team |
| District profile | The centre of Aljumum sits about 200 m above sea level (SRTM open elevation data) | SRTM (NASA) open data |
| Bitumen membrane (per m²) | SAR 15–35 per m² | Owner price list (Aljumum) |
Questions from Aljumum
What is the first step of bitumen membrane (without breaking)?
We start with preparation (cleaning, priming and repairs), then torch welding (overlaps are welded and checked).
How much does bitumen membrane cost in Aljumum?
From our published price list: Bitumen membrane (per m²) SAR 15–35 per m². Quantities are confirmed at the inspection.
What do I get at the end?
Photos of the welds and the flood-test result, in a technical report that carries a verification code.
What we advise against
- Leaving the membrane exposed without protection
What you get after the work
The written output: photos of the welds and the flood-test result. The report is numbered and can be checked with its verification code.
Practical notes for residents of Aljumum
- Prices are in Saudi riyals (SAR); the final price is confirmed after the inspection, before any work starts.
- Have access ready to the water meter, the tank hatches, the roof and the main valve; in apartment buildings the roof keys are often with the building guard (haris).
- If you rent, tell your landlord or building management before the visit and agree in writing who pays; the written report can be shared with them.
- Keep photos of the problem and of any earlier repairs — they help the technician compare before and after.
Sources and method
- SRTM (NASA) open data
- Kashf team
- Owner price list for Aljumum
- Local pages are published only after a quality gate: real local facts, text similarity of no more than 15% with any other English page, and a claims check.
- النسخة العربية