Bitumen membrane for schools in Allith
In short: Bitumen membrane for schools in Allith starts with the roof, falls and drains survey, then the flood test, before anything is opened. Allith is about 1.2 km from the sea coast (OpenStreetMap). Published price: Bitumen membrane (per m²), SAR 15–35 per m²; anything else is quoted after the inspection.
Bitumen membrane in Allith: the local context
Main roads in or near Allith: Al Laith Road, Amr Bin Al Aas Street. Allith is about 1.2 km from the sea coast (OpenStreetMap).
The centre of Allith sits about 5 m above sea level (SRTM open elevation data).
Bitumen membrane work for schools in Allith starts with the site's position. The centre of Allith sits about 5 m above sea level, and the town is about 1.2 km from the sea coast. Because of this, the first checks focus on how water moves across the roof and drains away from the building, and whether any low points could hold water after rain. Near-coast sites can also see salt-laden air, so the technician looks at existing surface condition before deciding how the membrane should be laid.
Some things can only be judged on the day. The technician walks the roof to confirm the slope, the state of the existing substrate, any blistering or lifting at laps, and the condition of upstands, parapets, drain outlets and penetrations for pipes and vents. The exact length of any cracks, the number of drains to be sealed and the amount of membrane needed are measured on the roof rather than estimated from plans. Access arrangements with the school, including timing around lessons and any safety rules for working near pupils, are also agreed during the visit.
For the technician, the useful points are these. Allith's elevation and nearness to the coast mean the roof should be reviewed for exposure and drainage before any scope is set. Bitumen membrane for this kind of roof is priced in the range of SAR 15–35 per m², while liquid roof waterproofing sits at SAR 8–25 per m² and XPS boards at SAR 12–30 per m², so the chosen system should be matched to the roof's condition and use. Where cracks are found in the surrounding structure, crack injection is priced at SAR 40–120 per metre, and that work is quoted separately. Bring photographs of each roof area, note any ponding after recent rain, and record the locations of all outlets so the quote reflects what is actually present.
For schools, the larger jobs are planned for weekends and holidays.
Signs that call for bitumen membrane
The following signs are worth checking before they grow:
- Old rolls that are cracking
- A flat concrete roof that needs waterproofing
The most common causes
- Seams that were not welded properly.
- A common cause: no protection layer.
Tools and methods, and when we use them
| Tool or method | What it measures | Why it is chosen here |
|---|---|---|
| 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 |
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 — Allith
| Item | Value | Source |
|---|---|---|
| Roads | Main roads in or near Allith: Al Laith Road, Amr Bin Al Aas Street | Kashf data (owner) |
| District profile | The centre of Allith sits about 5 m above sea level (SRTM open elevation data) | SRTM (NASA) open data |
| District profile | Allith is about 1.2 km from the sea coast (OpenStreetMap) | © OpenStreetMap contributors (ODbL) |
| Bitumen membrane (per m²) | SAR 15–35 per m² | Owner price list (Allith) |
Common questions about bitumen membrane in Allith
Where does bitumen membrane for schools start in Allith?
We start with preparation (cleaning, priming and repairs), then torch welding (overlaps are welded and checked).
What does bitumen membrane cost in Allith?
From our published price list: Bitumen membrane (per m²) SAR 15–35 per m². Quantities are confirmed at the inspection.
What do I receive after the work?
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
What you receive
The written output: photos of the welds and the flood-test result. The report is numbered and can be checked with its verification code.
If you live in Allith and are new to the area
- The Saudi weekend is Friday and Saturday; mention your preferred day and time when booking.
- You can message us on WhatsApp in English; the booking details are sent back to you in the chat to confirm before the visit.
- 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
- © OpenStreetMap contributors (ODbL)
- Kashf data (owner)
- Owner price list for Allith
- 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