Floor & balcony waterproofing for duplexes in Jeddah
In short: Floor & balcony waterproofing for duplexes in Jeddah starts with the roof, falls and drains survey, then the moisture meter for ceilings and walls, before anything is opened. The centre of Jeddah sits about 15 m above sea level (SRTM open elevation data). Published price: Bathroom waterproofing (per m²), SAR 15–40 per m²; anything else is quoted after the inspection.
What is specific about Jeddah for floor & balcony waterproofing
Team note on Jeddah: 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 Jeddah sits about 15 m above sea level (SRTM open elevation data).
Jeddah is about 2 km from the sea coast (OpenStreetMap).
Jeddah's centre sits about 15 m above sea level, and the city lies about 2 km from the sea coast. For duplex owners on the balcony and floor level, this combination means a home is close enough to the coast to feel humid air and salt-laden moisture, yet high enough that rainwater tends to run off rather than pool around the building. Our survey starts with these conditions in mind, because the moisture a duplex faces here comes from both the air and the occasional heavy shower, not only from the ground.
Because the site is close to the coast, we check balconies, terraces and the joints where floors meet walls, since salt and damp can work into small gaps over time. The short distance from the sea also means that coatings must handle humidity during application, so we plan work around drying conditions rather than rushing a single pass. The modest height above sea level means the rainwater drains from the roof and balcony surfaces, so falls and drain outlets are checked to make sure water leaves the slab properly. Pricing for each area is based on the surface measured, with liquid roof waterproofing at SAR 10–25 per m² and bitumen membrane at SAR 15–35 per m² for the main slab options, while bathrooms at SAR 15–40 per m² are handled as a separate, wetter zone.
Owners often avoid several common mistakes that we see in this area. The first is covering a cracked slab without first injecting and sealing the crack, which is priced at SAR 40–125 per metre and should come before any surface layer. The second is skipping the bathroom and balcony edge details, where water most often finds a route under finishes. The third is choosing a cheap surface treatment for a floor that carries standing water, when epoxy coating at SAR 35–95 per m² or spray foam at SAR 20–45 per m² may suit that specific condition better. Careful inspection before work starts keeps these errors from becoming costly repairs later.
In a duplex, the two floors often share lines, so tests are done floor by floor.
When do you need floor & balcony waterproofing?
These are the signs most often linked to floor & balcony waterproofing:
- Damp under the light well
- Water passing from the balcony to the floor below
- A wrong fall towards the door threshold
The most common causes
- A blocked drain.
- A common cause: a threshold without waterproofing.
- A common cause: incorrect falls.
Tools we use in Jeddah
| Tool or method | What it measures | Why it is chosen here |
|---|---|---|
| Roof, falls and drains survey | Ponding areas and the condition of the old layer | Limits: shows the condition, not the material alone |
| Moisture meter for ceilings and walls | Where water is entering now, from inside | Limits: measures the effect, not the water path |
| Flood test | Whether the waterproofing holds before it is covered | Limits: for roofs with drains and wet areas before tiling |
How the work is done, step by step
- Checking the falls: Where water collects and where it should go.
- Details: Thresholds, drains and upstands.
- Waterproofing: The layer is applied and protected.
- Flood test: Tested before the finish goes on.
Quick comparison: facts and costs in Jeddah
| Item | Value | Source |
|---|---|---|
| District profile | Team note on Jeddah: 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 |
| District profile | Jeddah is about 2 km from the sea coast (OpenStreetMap) | © OpenStreetMap contributors (ODbL) |
| District profile | The centre of Jeddah sits about 15 m above sea level (SRTM open elevation data) | SRTM (NASA) open data |
| Bathroom waterproofing (per m²) | SAR 15–40 per m² | Owner price list (Jeddah) |
Short answers for Jeddah
Can I use household chemicals instead of calling a technician?
Using unsuitable chemicals may corrode pipes and does not fix the root cause of the blockage, so it is better to rely on a specialist technician.
What is the difference between foam insulation and other types of insulation?
Foam insulation is easy to apply on uneven surfaces and forms one continuous layer with no joints, while other types, such as bitumen rolls, need the joints to be welded. The contractor decides which is most suitable after inspecting the site.
Can thermal insulation be applied to an existing building?
Yes, thermal insulation can be installed on the roofs and walls of existing buildings without the need for major structural modifications. The contractor prepares the surface, then applies the insulating material and the protective layer over it.
Where does floor & balcony waterproofing for duplexes start in Jeddah?
We start with checking the falls (where water collects and where it should go), then details (thresholds, drains and upstands).
What does floor & balcony waterproofing cost in Jeddah?
From our published price list: Bathroom waterproofing (per m²) SAR 15–40 per m². Quantities are confirmed at the inspection.
What do I receive after the work?
The flood result and photos of the details, in a technical report that carries a verification code.
Common mistakes we see
- Tiling a balcony without waterproofing
The written outputs
You receive: the flood result and photos of the details, in a technical report with a verification code.
Planning the visit in Jeddah
- You can message us on WhatsApp in English; the booking details are sent back to you in the chat to confirm before the visit.
- The Saudi weekend is Friday and Saturday; mention your preferred day and time when booking.
- 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
- © OpenStreetMap contributors (ODbL)
- Kashf team
- Customer questions (reviewed)
- Owner price list for Jeddah
- 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