Roof waterproofing for duplexes in Allith
In short: Roof waterproofing for duplexes in Allith starts with the roof, falls and drains survey, then the moisture meter for ceilings and walls, before anything is opened. Allith is about 1.2 km from the sea coast (OpenStreetMap). Published price: Liquid roof waterproofing (per m²), SAR 8–25 per m²; anything else is quoted after the inspection.
What is specific about Allith for roof waterproofing
Allith is about 1.2 km from the sea coast (OpenStreetMap). The centre of Allith sits about 5 m above sea level (SRTM open elevation data).
Main roads in or near Allith: Al Laith Road, Amr Bin Al Aas Street.
Roof waterproofing work in Allith begins with the location itself. The centre of Allith sits about 5 m above sea level, and the town lies about 1.2 km from the sea coast. Because the ground is low and the air is salt-laden near the coast, technicians check how water drains off the roof surface and whether salt deposits have already started to weaken old coatings. These two facts decide where the first inspection starts, before any product is chosen.
Several points are left to the site visit, because they cannot be judged from a distance. The technician will look at the age and type of the existing roof finish, the size and depth of any cracks, and whether a bitumen membrane, liquid coating or insulation board is already in place. They will also check the slope of the roof, the condition of parapets and drain outlets, and any water staining on the ceiling below. Prices depend on the area and the method chosen, so a quote is given only after these checks are complete. 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, but the right option for a given duplex is decided on site.
To help the technician, residents should gather a few details before the visit. Note when leaks first appeared and whether they occur after heavy rain or during the summer heat. Mention any previous repairs, the year the roof was last sealed, and whether the upper floor is occupied. Clear access to the roof hatch and a safe route to the top of the building will speed up the inspection. If there is a water tank on the roof, say so, since tank internal coating is priced separately at SAR 25–60 per m². Accurate answers to these questions let the technician plan the work and explain the options clearly.
In a duplex, the two floors often share lines, so tests are done floor by floor.
When do you need roof waterproofing?
These are the signs most often linked to roof waterproofing:
- Water pooling on the roof
- Stains on the top-floor ceiling after rain
- The old waterproofing is cracking
Where the problem usually comes from
- A common cause: wrong falls towards the drains.
- Damaged waterproofing around tank and AC bases — we check this before anything else.
- Cracks in the roof slab — we check this before anything else.
How we choose the tool in Allith
| 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 |
| 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.
Allith in facts and sources
| Item | Value | Source |
|---|---|---|
| District profile | The centre of Allith sits about 5 m above sea level (SRTM open elevation data) | SRTM (NASA) open data |
| District profile | Allith is about 1.2 km from the sea coast (OpenStreetMap) | © OpenStreetMap contributors (ODbL) |
| Roads | Main roads in or near Allith: Al Laith Road, Amr Bin Al Aas Street | Kashf data (owner) |
| Liquid roof waterproofing (per m²) | SAR 8–25 per m² | Owner price list (Allith) |
| Bitumen membrane (per m²) | SAR 15–35 per m² | Owner price list (Allith) |
Questions from Allith
Where does roof waterproofing for duplexes start in Allith?
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 Allith?
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.
What we advise against
- 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.
Planning the visit in Allith
- 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
- © 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