Roof waterproofing for duplexes in Alula
In short: In Alula (Alula), roof waterproofing for duplexes begins with the roof, falls and drains survey and the moisture meter for ceilings and walls; nothing is opened until the position is clear. The centre of Alula sits about 697 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.
Roof waterproofing in Alula: the local context
Main roads in or near Alula: King Abdullah Road. The centre of Alula sits about 697 m above sea level (SRTM open elevation data).
The first thing checked on a duplex roof in Alula is the elevation, because the centre of Alula sits about 697 m above sea level (SRTM open elevation data). At that height the ground is an inland, desert-edge setting rather than a coastal one, and the roof is exposed to strong sun and wide daily temperature swings. These conditions stress the surface, so the technician first looks at how the existing finish has aged, where water has been ponding, and whether any previous repair has lifted at the edges. The price range for liquid roof waterproofing, SAR 8–25 per m², and for bitumen membrane, SAR 15–35 per m², helps the household understand the cost difference between systems before the roof is measured.
Several things are left to the site visit because they cannot be judged from a description. The true roof area, the slope, the number and condition of parapets, and the position of drains all change the quantity and the method. The technician also checks for cracks, since crack injection is priced at SAR 40–120 per metre, and for any water entering from below, where basement waterproofing at SAR 50–150 per m² or XPS boards at SAR 12–30 per m² may be relevant. Where a water tank sits on the roof, tank internal coating at SAR 25–60 per m² is a separate item. Spray foam at SAR 20–45 per m² and epoxy coating at SAR 35–90 per m² are also weighed against the surface and the access available on the day.
To help the technician, the household should have the following ready: any previous waterproofing invoices, the approximate age of the duplex, and a note of where leaks have appeared inside the upper floor. Clear access to the roof hatch, a safe place to stack materials, and a confirmed water supply for mixing and cleaning make the visit more efficient. Please also mention whether a bathroom on the roof side has been waterproofed recently, since bathroom waterproofing at SAR 15–40 per m² often shares a connection with the roof drainage. With this information, the site visit can focus on the real problem rather than on guesswork.
In a duplex, the two floors often share lines, so tests are done floor by floor.
When do you need roof waterproofing?
If you notice one of these signs in Alula, it is a good moment to talk to the team:
- The old waterproofing is cracking
- Water pooling on the roof
- Stains on the top-floor ceiling after rain
The most common causes
- Cracks in the roof slab — we check this before anything else.
- Wrong falls towards the drains.
- A common cause: damaged waterproofing around tank and AC bases.
Tools and methods, and when we use them
| Tool | What it finds | When we use it in Alula |
|---|---|---|
| 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 |
| Flood test | Whether the waterproofing holds before it is covered | Limits: for roofs with drains and wet areas before tiling |
The steps in order
- 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 — Alula
| Item | Value | Source |
|---|---|---|
| District profile | The centre of Alula sits about 697 m above sea level (SRTM open elevation data) | SRTM (NASA) open data |
| Roads | Main roads in or near Alula: King Abdullah Road | Kashf data (owner) |
| Liquid roof waterproofing (per m²) | SAR 8–25 per m² | Owner price list (Alula) |
| Bitumen membrane (per m²) | SAR 15–35 per m² | Owner price list (Alula) |
Common questions about roof waterproofing in Alula
What is the first step of roof waterproofing for duplexes?
We start with survey (falls, drains and the condition of the old layer are recorded), then preparation (cleaning and repairs before any new layer).
How much does roof waterproofing cost in Alula?
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 get at the end?
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
What you get after the work
The written output: a quality record with photos and the flood-test result. The report is numbered and can be checked with its verification code.
Practical notes for residents of Alula
- 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.
- 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.
Sources and method
- SRTM (NASA) open data
- Kashf data (owner)
- Owner price list for Alula
- 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