Roof waterproofing in Alkharj: with a verifiable technical report
In short: Roof waterproofing (with a verifiable technical report) in Alkharj starts with the roof, falls and drains survey, then the moisture meter for ceilings and walls, before anything is opened. The centre of Alkharj sits about 439 m above sea level (SRTM open elevation data). Pricing starts from Liquid roof waterproofing (per m²) (SAR 8–25 per m²), and other items are quoted after the visit.
Before we start: what we know about Alkharj
Main roads in or near Alkharj: King Abdullah Road. The centre of Alkharj sits about 439 m above sea level (SRTM open elevation data).
Team note on Alkharj: 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..
Roof waterproofing in Alkharj starts with the ground itself. The centre of Alkharj sits about 439 m above sea level (SRTM open elevation data), so a roof here is exposed to a dry inland climate with sharp swings between day and night temperatures, and the technician checks the roof surface before anything else. Our checklist begins with the condition of the existing membrane, any ponding or drainage routes, and the outlet points, because these decide whether the roof can take a new layer at all. Each item is recorded in a verifiable technical report so the homeowner can see what was found and why the chosen method was selected.
Several things are left to the site visit, because they cannot be judged from a description. The technician measures the roof area in square metres and notes every upstand, parapet, and penetration for pipes, vents, and the water tank. Liquid roof waterproofing is priced at SAR 8–25 per m², bitumen membrane at SAR 15–35 per m², and XPS boards at SAR 12–30 per m², so the final method and cost range depend on the measured area and on whether the existing surface needs repair first. Crack injection, priced at SAR 40–120 per metre, is only quoted once cracks are mapped and their length is confirmed on site. Where a roof also feeds a rooftop tank, the tank's internal coating is priced separately at SAR 25–60 per m², and that scope is confirmed during the visit rather than assumed.
Information that helps the technician is simple to prepare. Please note when the roof last leaked, where water was seen after rain, whether the roof is accessible for foot traffic, and any earlier repairs or products used. Share photographs of cracks and drains, and confirm whether the building has a basement or bathrooms above the roof area, since those are separate waterproofing scopes. With this information ready, the technician can arrange a faster visit and produce a clear report that matches the actual condition of your roof.
Each job ends with a written report that carries a verification code you can check on our site.
When do you need roof waterproofing?
If you notice one of these signs in Alkharj, it is a good moment to talk to the team:
- Water pooling on the roof
- Stains on the top-floor ceiling after rain
- The old waterproofing is cracking
The most common causes
- Wrong falls towards the drains — we check this before anything else.
- Damaged waterproofing around tank and AC bases.
- A common cause: cracks in the roof slab.
Tools and methods, and when we use them
| Method | What it helps with | Its role in Alkharj |
|---|---|---|
| Flood test | Whether the waterproofing holds before it is covered | Limits: for roofs with drains and wet areas before tiling |
| Moisture meter for ceilings and walls | Where water is entering now, from inside | Limits: measures the effect, not the water path |
| Roof, falls and drains survey | Ponding areas and the condition of the old layer | Limits: shows the condition, not the material alone |
From the first visit to the report
- Survey: Falls, drains and the condition of the old layer are recorded.
- Preparation: Cleaning and repairs before any new layer.
- Primer: The base coat that the system needs.
- Waterproofing layers and details: Corners, upstands and bases get their own detail.
- Flood test: The roof is flooded and checked before it is covered.
Facts and costs — Alkharj
| Item | Value | Source |
|---|---|---|
| District profile | The centre of Alkharj sits about 439 m above sea level (SRTM open elevation data) | SRTM (NASA) open data |
| Roads | Main roads in or near Alkharj: King Abdullah Road | Kashf data (owner) |
| District profile | Team note on Alkharj: 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 |
| Liquid roof waterproofing (per m²) | SAR 8–25 per m² | Owner price list (Alkharj) |
| Bitumen membrane (per m²) | SAR 15–35 per m² | Owner price list (Alkharj) |
Questions from Alkharj
Does an underground tank require waterproofing even if it is new?
Yes, concrete is naturally porous, which can lead to leaks or groundwater seepage. Applying epoxy or cementitious insulation from the start maintains water quality and protects the structure from corrosion.
Do you need to evacuate the building during renovation work?
It depends on the type and scope of the work. Surface work such as plastering and painting usually does not require evacuation, while partial or full evacuation may be advised in cases of structural reinforcement, and the contractor determines this after inspection.
Where does roof waterproofing (with a verifiable technical report) start in Alkharj?
We start with survey (falls, drains and the condition of the old layer are recorded), then preparation (cleaning and repairs before any new layer).
What does roof waterproofing cost in Alkharj?
From our published price list: Liquid roof waterproofing (per m²) SAR 8–25 per m²; Bitumen membrane (per m²) SAR 15–35 per m². Quantities are confirmed at the inspection.
What do I receive after the work?
A quality record with photos and the flood-test result, in a technical report that carries a verification code.
Mistakes that cost more
- Ignoring the tank bases
- Covering the waterproofing before the flood test
The written outputs
You receive: a quality record with photos and the flood-test result, in a technical report with a verification code.
Planning the visit in Alkharj
- 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 data (owner)
- Kashf team
- Customer questions (reviewed)
- Owner price list for Alkharj
- 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