Bitumen membrane in Allith: before summer & rain season
In short: Bitumen membrane (before summer & rain season) in Allith starts with the roof, falls and drains survey, then the flood test, before anything is opened. The centre of Allith sits about 5 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 Allith
The centre of Allith sits about 5 m above sea level (SRTM open elevation data). Allith is about 1.2 km from the sea coast (OpenStreetMap).
Main roads in or near Allith: Al Laith Road, Amr Bin Al Aas Street.
Bitumen membrane on a flat roof is the most common problem in Allith, usually showing up as blistering, lifted laps at the edges, and cracks around roof drains and parapet walls. Once water gets under the membrane, it spreads quietly through the insulation and into the ceiling below, so a small patch can turn into a much larger repair. For a bitumen membrane job, the price typically falls within SAR 15–35 per m², but the real question is whether the existing surface can take a new layer at all, which is why the inspection matters more than the quote.
Allith sits about 5 m above sea level, and the centre is only about 1.2 km from the coast. That combination means roofs here are exposed to salt-laden air, strong summer heat that softens and expands the bitumen, and rain that arrives in short, heavy bursts during the rain season. Salt can speed up corrosion of metal flashing and fixings, and it can leave residues that stop new bitumen from bonding properly. Because the site is low and close to the sea, drainage outlets and roof edges need particular attention, since water that pools or backs up has fewer places to run. The approach therefore starts with cleaning off salt and debris, checking outlets and flashing, and making sure the surface is dry and sound before any new membrane goes down. Doing this before summer heat and before the rain season gives the work time to cure properly.
Before the visit, ask the provider to explain how they will inspect the roof for blistering, cracks, and failed laps, and whether they will check the drains and parapet junctions as well as the main field. Ask how they plan to deal with salt residue and whether they will test adhesion before laying the new layer. Confirm what is included in the per m² price, such as preparation, edge detailing, and removal of old material, and ask whether any extra cracks or outlet repairs will be quoted separately. Finally, ask how long the work will take and whether it can be scheduled outside the hottest hours and ahead of the rain.
Checks before summer and before the rain season catch problems while they are still small.
Signs worth paying attention to
The following signs are worth checking before they grow:
- A flat concrete roof that needs waterproofing
- Old rolls that are cracking
Causes we see in the field
- No protection layer.
- Seams that were not welded properly — we check this before anything else.
Tools we use in Allith
| Tool | What it finds | When we use it in Allith |
|---|---|---|
| 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.
Quick comparison: facts and costs in Allith
| Item | Value | Source |
|---|---|---|
| District profile | Allith is about 1.2 km from the sea coast (OpenStreetMap) | © OpenStreetMap contributors (ODbL) |
| District profile | The centre of Allith sits about 5 m above sea level (SRTM open elevation data) | SRTM (NASA) open data |
| Roads | Main roads in or near Allith: Al Laith Road, Amr Bin Al Aas Street | Kashf data (owner) |
| Bitumen membrane (per m²) | SAR 15–35 per m² | Owner price list (Allith) |
Common questions about bitumen membrane in Allith
Where does bitumen membrane (before summer & rain season) 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
The written outputs
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
- 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
- © 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