Roof waterproofing for schools in Arar
In short: In Arar (Arar), roof waterproofing for schools 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 Arar sits about 553 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.
Before we start: what we know about Arar
The centre of Arar sits about 553 m above sea level (SRTM open elevation data).
Arar sits at the northern edge of the Kingdom, and its centre lies about 553 m above sea level (SRTM open elevation data). That height means the town is a high plateau rather than a low desert basin, so school roofs here face a different mix of weather than those on the coast. Owners should plan roof work with the local climate in mind, not treat it as a copy of a job done in Jeddah or Dammam.
Because the centre of Arar is at this elevation, the practical effect on a school roof is that the surface is exposed to strong sun by day and to a noticeable drop in temperature at night. That daily swing makes the roof membrane expand and contract, which is why the choice of material matters. For flat school roofs, liquid roof waterproofing, priced at SAR 8–25 per m², forms a seamless layer that can follow the roof's shape. Bitumen membrane, at SAR 15–35 per m², is a sheet system that suits roofs where a firm, layered barrier is wanted. Where the roof needs extra insulation under the waterproofing, XPS boards at SAR 12–30 per m² add a thermal layer. Spray foam, at SAR 20–45 per m², is another option for flat roofs where a continuous, joint-free surface is important.
Owners of school roofs in Arar often avoid a few common mistakes. They do not wait for small cracks to grow, since crack injection is priced at SAR 40–120 per metre, and early repair costs far less than later damage. They also do not measure the roof area loosely, because each product is quoted per m², so an accurate figure keeps the budget clear. Finally, they avoid choosing a coating only on price, and instead compare the system with the roof's age, its drainage and the daily heat it faces. Basement, bathroom and tank coatings are separate jobs, so schools should quote each area on its own terms.
For schools, the larger jobs are planned for weekends and holidays.
Signs worth paying attention to
If you notice one of these signs in Arar, it is a good moment to talk to the team:
- Stains on the top-floor ceiling after rain
- Water pooling on the roof
- The old waterproofing is cracking
Causes we see in the field
- Damaged waterproofing around tank and AC bases.
- Wrong falls towards the drains.
- A common cause: cracks in the roof slab.
Tools and methods, and when we use them
| Tool | What it finds | When we use it in Arar |
|---|---|---|
| Flood test | Whether the waterproofing holds before it is covered | Limits: for roofs with drains and wet areas before tiling |
| 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 |
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 — Arar
| Item | Value | Source |
|---|---|---|
| District profile | The centre of Arar sits about 553 m above sea level (SRTM open elevation data) | SRTM (NASA) open data |
| Liquid roof waterproofing (per m²) | SAR 8–25 per m² | Owner price list (Arar) |
| Bitumen membrane (per m²) | SAR 15–35 per m² | Owner price list (Arar) |
Short answers for Arar
What is the first step of roof waterproofing for schools?
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 Arar?
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.
What we advise against
- Covering the waterproofing before the flood test
- Ignoring the tank bases
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 Arar
- 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.
- 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
- Owner price list for Arar
- 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