Bitumen membrane in Alahsa: with a verifiable technical report
In short: In Alahsa (Alahsa), bitumen membrane (with a verifiable technical report) begins with the roof, falls and drains survey and the flood test; nothing is opened until the position is clear. The centre of Alahsa sits about 152 m above sea level (SRTM open elevation data). Published price: Bitumen membrane (per m²), SAR 15–35 per m²; anything else is quoted after the inspection.
Why bitumen membrane differs in Alahsa
Team note on Alahsa: 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 Alahsa sits about 152 m above sea level (SRTM open elevation data).
Bitumen membrane work in Alahsa starts with the ground and the roof as they actually are. The centre of Alahsa sits about 152 m above sea level according to SRTM open elevation data, which is useful background when a technician reviews how water is likely to drain across a site. Before any price is discussed, the first checks cover the surface condition, existing cracks, and whether the area being covered is flat, sloped, or heavily used. A bitumen membrane is typically priced at SAR 15–35 per m², and that range is only meaningful once the surface area and its condition are confirmed on site.
Several things are deliberately left to the site visit rather than assumed from a distance. These include the exact measured area, the state of any old membrane or coating, the presence of moisture in the substrate, and access for materials and workers. The technician will also decide whether a related task is needed, since the range for crack injection is SAR 40–120 per metre and that depends entirely on how many cracks are found and how long they run. Likewise, where bitumen sits alongside other systems such as liquid roof waterproofing at SAR 10–25 per m², or XPS boards at SAR 10–30 per m², the right choice cannot be made without seeing the structure in person.
For the technician, the most helpful information is a clear sketch or list of the areas, notes on previous leaks or repairs, and photographs taken in daylight showing the surface and any visible cracks or ponding. It also helps to state whether the space is a roof, a basement, or a water tank, because each carries different expectations. Tank internal coating, for example, is priced separately at SAR 25–60 per m², so a tank should be identified as such from the start. Providing these details early keeps the quotation grounded in what is really present, and it allows the technician to plan materials and time with fewer surprises once work begins.
Each job ends with a written report that carries a verification code you can check on our site.
When do you need bitumen membrane?
If you notice one of these signs in Alahsa, it is a good moment to talk to the team:
- Old rolls that are cracking
- A flat concrete roof that needs waterproofing
The most common causes
- Seams that were not welded properly — we check this before anything else.
- No protection layer.
Tools and methods, and when we use them
| Tool | What it finds | When we use it in Alahsa |
|---|---|---|
| Flood test | Whether the waterproofing holds before it is covered | Limits: for roofs with drains and wet areas before tiling |
| Roof, falls and drains survey | Ponding areas and the condition of the old layer | Limits: shows the condition, not the material alone |
How the work is done, step by step
- 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.
Alahsa in facts and sources
| Item | Value | Source |
|---|---|---|
| District profile | The centre of Alahsa sits about 152 m above sea level (SRTM open elevation data) | SRTM (NASA) open data |
| District profile | Team note on Alahsa: 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 (Alahsa) |
Questions from Alahsa
Is it possible to unclog drains without breaking the floors?
In most cases, yes: camera inspection and high-pressure water jetting clear the blockage from drain openings and inspection chambers without breaking anything, except when there is an actual break in the pipes.
Does renovation include treating dampness and insulation?
Usually yes, since dampness treatment is an essential part of renovation, especially in Al-Ahsa. The contractor identifies the source of the leak and then carries out the appropriate insulation. Mention the dampness problem in your request description.
What is the difference between foam insulation and roll insulation?
Foam is sprayed on as a continuous layer with no seams and provides both thermal and water insulation, while rolls are separate pieces that require joining and mainly focus on water insulation.
What is the first step of bitumen membrane (with a verifiable technical report)?
We start with preparation (cleaning, priming and repairs), then torch welding (overlaps are welded and checked).
How much does bitumen membrane cost in Alahsa?
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 receive
You receive: photos of the welds and the flood-test result, in a technical report with a verification code.
Practical notes for residents of Alahsa
- 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.
- 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).
Sources and method
- SRTM (NASA) open data
- Kashf team
- Customer questions (reviewed)
- Owner price list for Alahsa
- 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