Bitumen membrane in Unaizah: without breaking
In short: Bitumen membrane (without breaking) in Unaizah starts with the roof, falls and drains survey, then the flood test, before anything is opened. The centre of Unaizah sits about 667 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.
Before we start: what we know about Unaizah
Team note on Unaizah: 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 Unaizah sits about 667 m above sea level (SRTM open elevation data).
Bitumen membrane waterproofing in Unaizah is priced at SAR 15–35 per m², and the most common problem we see with this property type is water getting under an old membrane that has lost its bond at the edges and seams. The damage usually shows as damp patches on ceilings below the roof, or as moisture rising through the top slab after a rainy period. Many owners assume the whole roof must be stripped out, but that is rarely the right first step. The aim is to find where water is entering and repair that area while keeping sound sections in place.
The local setting shapes that approach. The centre of Unaizah sits about 667 m above sea level, which places the town on higher ground than many nearby areas. Roofs there face strong sun, wide daily temperature swings and dry spells broken by occasional heavy rain. Those conditions cause bitumen to soften in heat and crack as it cools, so surfaces that look sound can hide weak laps and lifted corners. A careful inspection therefore starts with the parapets, drainage outlets, upstands and any penetrations such as pipes or access hatches, because these are where the membrane most often fails. Where the membrane is intact but worn, a fresh bitumen layer can be bonded over the existing surface, which avoids unnecessary removal and keeps disruption and cost down.
Before the visit, ask the provider to explain how they will locate the leak, whether they will test the drainage and outlets, and how they plan to treat the edges and joints. Ask whether they expect to repair sections or recoat the full roof, and what that means for the price per m² within the SAR 15–35 range. Check whether the quote covers the parapets and upstands, not only the flat area, and whether it includes clearing debris from drains beforehand. It is also worth asking which parts of the roof the work will affect, so you can plan access, furniture and any rooms beneath that may need protecting during the work.
The aim is to locate the cause with instruments first, so any opening is limited to one point.
Signs that call for bitumen membrane
These are the signs most often linked to bitumen membrane:
- Old rolls that are cracking
- A flat concrete roof that needs waterproofing
Causes we see in the field
- Seams that were not welded properly.
- No protection layer — we check this before anything else.
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 |
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.
Quick comparison: facts and costs in Unaizah
| Item | Value | Source |
|---|---|---|
| District profile | The centre of Unaizah sits about 667 m above sea level (SRTM open elevation data) | SRTM (NASA) open data |
| District profile | Team note on Unaizah: 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 (Unaizah) |
Questions from Unaizah
Where does bitumen membrane (without breaking) start in Unaizah?
We start with preparation (cleaning, priming and repairs), then torch welding (overlaps are welded and checked).
What does bitumen membrane cost in Unaizah?
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.
Common mistakes we see
- Leaving the membrane exposed without protection
What you get after the work
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 Unaizah 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
- Kashf team
- Owner price list for Unaizah
- 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