Bitumen membrane for warehouses in Jazan
In short: In Jazan (Jazan), bitumen membrane for warehouses begins with the roof, falls and drains survey and the flood test; nothing is opened until the position is clear. The centre of Jazan sits about 7 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 Jazan
The centre of Jazan sits about 7 m above sea level (SRTM open elevation data). Jazan is about 1.9 km from the sea coast (OpenStreetMap).
Team note on Jazan: 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..
An owner of a warehouse in Jazan usually has a large, flat roof that takes the full force of the sun and the occasional heavy rain. Over the years the surface can split, lift at the edges, or let water seep into stored goods below. Many owners only notice the problem once a ceiling stain appears, by which point the damage has spread. Planning a waterproofing layer before that happens keeps stock dry and avoids costly repairs later.
The local facts shape how that planning should be approached. The centre of Jazan sits about 7 m above sea level, so the site is low-lying in relation to the land around it, and water that runs off a roof needs a clear route to drain away rather than pooling in gentle dips. Jazan is also about 1.9 km from the sea coast, which means the air carries salt and humidity that can wear down surfaces over time. A bitumen membrane, priced at SAR 15–35 per m², is a practical choice for a wide roof because it forms a continuous, sealed skin that copes well with the ongoing movement caused by temperature swings.
For a sound result, begin by inspecting the whole roof and marking every crack, blister, and wet patch. Next, clean the surface and remove loose material, since the membrane will only bond to a dry, sound base. Then repair any cracks, and where a longer split runs along the surface, treat it as a separate item priced at SAR 40–120 per metre. Lay the bitumen membrane in overlapping strips, working from the low point of the roof upward so that each layer sheds water over the one below. Check that upstand edges and drain outlets are sealed tightly. Finally, schedule a follow-up inspection after the first heavy rain to confirm that water is running off as intended and not finding a way underneath.
For warehouses, work is phased around operations and stored goods.
When do you need bitumen membrane?
These are the signs most often linked to bitumen membrane:
- A flat concrete roof that needs waterproofing
- Old rolls that are cracking
The most common causes
- A common cause: no protection layer.
- Seams that were not welded properly.
Tools and methods, and when we use them
| Tool | What it finds | When we use it in Jazan |
|---|---|---|
| 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 |
From the first visit to the report
- 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 — Jazan
| Item | Value | Source |
|---|---|---|
| District profile | Jazan is about 1.9 km from the sea coast (OpenStreetMap) | © OpenStreetMap contributors (ODbL) |
| District profile | The centre of Jazan sits about 7 m above sea level (SRTM open elevation data) | SRTM (NASA) open data |
| District profile | Team note on Jazan: 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 |
| Bitumen membrane (per m²) | SAR 15–35 per m² | Owner price list (Jazan) |
Common questions about bitumen membrane in Jazan
What is the first step of bitumen membrane for warehouses?
We start with preparation (cleaning, priming and repairs), then torch welding (overlaps are welded and checked).
How much does bitumen membrane cost in Jazan?
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.
Mistakes that cost more
- Leaving the membrane exposed without protection
The written outputs
You receive: photos of the welds and the flood-test result, in a technical report with a verification code.
Practical notes for residents of Jazan
- 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).
- Prices are in Saudi riyals (SAR); the final price is confirmed after the inspection, before any work starts.
- Keep photos of the problem and of any earlier repairs — they help the technician compare before and after.
- 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.
Sources and method
- SRTM (NASA) open data
- © OpenStreetMap contributors (ODbL)
- Kashf team
- Owner price list for Jazan
- 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