Bitumen membrane for schools in Aldarb
In short: In Aldarb (Aldarb), bitumen membrane for schools begins with the roof, falls and drains survey and the flood test; nothing is opened until the position is clear. Aldarb is about 18.7 km from the sea coast (OpenStreetMap). Pricing starts from Bitumen membrane (per m²) (SAR 15–35 per m²), and other items are quoted after the visit.
Bitumen membrane in Aldarb: the local context
Aldarb is about 18.7 km from the sea coast (OpenStreetMap). The centre of Aldarb sits about 79 m above sea level (SRTM open elevation data).
Would a school in Aldarb need a bitumen membrane on its flat roof, and what does that cost? The centre of Aldarb sits about 79 m above sea level, and the town is about 18.7 km from the sea coast, so school buildings here face a dry, inland climate that still puts real stress on roofs through heat and seasonal rain. For a flat roof on a school, a bitumen membrane is one of the waterproofing options to consider, and the price for this work is SAR 15–35 per m². That range is useful for a school board comparing the membrane with liquid roof waterproofing at SAR 8–25 per m² or spray foam at SAR 20–45 per m².
Before any work is quoted, the site visit usually begins with a walk across the whole roof to look at the surface, the edges, drains and any places where water has already left a mark. The inspector checks for cracks, blistered or lifted areas, and signs of ponding water that stays after rain. Where walls meet the roof, or where pipes and roof hatches pass through, those joins are looked at closely because they are common routes for leaks. The inspector also notes the roof area in square metres, since the membrane is priced per m², and records any stretches where cracks run in a line, which may need separate treatment at the crack injection rate of SAR 40–120 per metre.
To make the visit go smoothly, the school should gather any records of past roof repairs, dates of leaks it has noticed, and the location of rooms directly below the roof, such as classrooms, stores or the library. Clear access to the roof and its ladder or stair route should be arranged ahead of time, and staff should be told in advance so that students stay away from the work area. Having a rough plan of the roof with its measured area marked on it will help the visit cover everything on the first attempt.
For schools, the larger jobs are planned for weekends and holidays.
Signs worth paying attention to
The following signs are worth checking before they grow:
- Old rolls that are cracking
- A flat concrete roof that needs waterproofing
Where the problem usually comes from
- Seams that were not welded properly.
- A common cause: no protection layer.
Tools we use in Aldarb
| Method | What it helps with | Its role in Aldarb |
|---|---|---|
| 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.
Aldarb in facts and sources
| Item | Value | Source |
|---|---|---|
| District profile | The centre of Aldarb sits about 79 m above sea level (SRTM open elevation data) | SRTM (NASA) open data |
| District profile | Aldarb is about 18.7 km from the sea coast (OpenStreetMap) | © OpenStreetMap contributors (ODbL) |
| Bitumen membrane (per m²) | SAR 15–35 per m² | Owner price list (Aldarb) |
Common questions about bitumen membrane in Aldarb
What is the first step of bitumen membrane for schools?
We start with preparation (cleaning, priming and repairs), then torch welding (overlaps are welded and checked).
How much does bitumen membrane cost in Aldarb?
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
You receive: photos of the welds and the flood-test result, in a technical report with a verification code.
If you live in Aldarb and are new to the area
- 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.
- 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.
Sources and method
- SRTM (NASA) open data
- © OpenStreetMap contributors (ODbL)
- Owner price list for Aldarb
- 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