Roof waterproofing in Najran: before buying or handover
In short: Roof waterproofing (before buying or handover) in Najran starts with the roof, falls and drains survey, then the moisture meter for ceilings and walls, before anything is opened. The centre of Najran sits about 1309 m above sea level (SRTM open elevation data). Published price: Liquid roof waterproofing (per m²), SAR 8–25 per m²; anything else is quoted after the inspection.
What is specific about Najran for roof waterproofing
Main roads in or near Najran: Al Jarba Street. The centre of Najran sits about 1309 m above sea level (SRTM open elevation data).
Team note on Najran: 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 Najran starts with the altitude. The centre of Najran sits about 1309 m above sea level (SRTM open elevation data), which means a roof here is exposed to a different climate than one on the coast, with strong sun during the day and sharp temperature swings between day and night. Before you agree on a method, look at the roof surface for previous coatings, hairline cracks, blistering and any patches that have lifted. Ask what was used before and when it was last renewed, because the choice between a liquid system and a membrane depends on what is already on the slab.
The costs in the price guide give a sense of the range you may meet. Liquid roof waterproofing is listed at SAR 8–25 per m², bitumen membrane at SAR 15–35 per m², and XPS boards at SAR 12–30 per m². Spray foam is SAR 20–45 per m² and epoxy coating is SAR 35–90 per m². A quote far below the bottom of the range for a given system should prompt questions about what is included. Crack injection is priced per metre at SAR 40–120 per m, so ask how many metres of cracking were counted and whether the visit confirmed them.
Some points are left to the site visit and cannot be settled from a price list. The technician should check the fall of the roof so that water drains to the outlets, the condition of parapets, the sealing around pipes and drains, and whether the slab holds standing water after rain. The access route, the state of any existing screed and the presence of rooftop tanks or equipment that must be lifted or worked around also belong in the visit. Ask the technician to note these on the written quote.
To help the technician, prepare the roof before the visit: clear loose debris, note where leaks have appeared inside the building and when, and have any earlier contracts or warranty papers ready. Say which area you use for living, drying clothes or storing water, since that affects the finish you need. Clear answers on these points make the assessment faster and the quote more reliable.
Before buying or taking over a property, an inspection gives you findings in writing before you sign.
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
- Wrong falls towards the drains — we check this before anything else.
- A common cause: damaged waterproofing around tank and AC bases.
- Cracks in the roof slab — we check this before anything else.
Tools we use in Najran
| Tool | What it finds | When we use it in Najran |
|---|---|---|
| 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 |
How the work is done, step by step
- 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.
Najran in facts and sources
| Item | Value | Source |
|---|---|---|
| District profile | The centre of Najran sits about 1309 m above sea level (SRTM open elevation data) | SRTM (NASA) open data |
| Roads | Main roads in or near Najran: Al Jarba Street | Kashf data (owner) |
| District profile | Team note on Najran: 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 (Najran) |
| Bitumen membrane (per m²) | SAR 15–35 per m² | Owner price list (Najran) |
Short answers for Najran
Where does roof waterproofing (before buying or handover) start in Najran?
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 Najran?
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.
Common mistakes we see
- Ignoring the tank bases
- Covering the waterproofing before the flood test
What you receive
You receive: a quality record with photos and the flood-test result, in a technical report with a verification code.
Planning the visit in Najran
- 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
- Owner price list for Najran
- 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