Roof waterproofing in Allith: preventive periodic check
In short: In Allith (Allith), roof waterproofing (preventive periodic check) begins with the roof, falls and drains survey and the moisture meter for ceilings and walls; nothing is opened until the position is clear. Allith is about 1.2 km from the sea coast (OpenStreetMap). Pricing starts from Liquid roof waterproofing (per m²) (SAR 8–25 per m²), and other items are quoted after the visit.
Before we start: what we know about Allith
Main roads in or near Allith: Al Laith Road, Amr Bin Al Aas Street. 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).
Ponding water and failed sealant around roof drains and parapets are the most common problems on flat roofs in this type of property, and they usually go unnoticed until a stain appears on a ceiling. A periodic preventive check looks for these weak points before water gets under the surface, which is far cheaper than repairing damaged insulation and plaster afterwards. For roof waterproofing, the usual scope covers the membrane or liquid coating, the upstands and the joints, and the drainage outlets that keep water moving off the surface.
Allith sits about 5 m above sea level, and the centre is roughly 1.2 km from the sea coast. That combination matters. The site is low-lying enough that drainage paths and outlets need to be clear, yet it is not so close to the shore that the same salt-exposure concerns apply as on a beachfront building. In practice, the check should focus on whether rainwater and condensation can pool at low points, and whether outlets and gutters are blocked by debris. The proximity to the coast also means the coating's condition at the edges and upstands deserves a close look, since these areas take the most wear from weather and temperature swings.
Before booking the visit, ask the provider to confirm which waterproofing method they plan to use and why it suits your roof. Liquid roof waterproofing is typically priced at SAR 8–25 per m², while a bitumen membrane sits at SAR 15–35 per m², so ask for a written breakdown by area. Ask whether they will inspect the drains, upstands and any existing cracks, and whether crack injection, priced at SAR 40–120 per metre, is included or quoted separately. Request a clear description of the surface preparation, and ask how they will record the condition of the roof so you can compare it at the next periodic check.
Preventive checks follow a written schedule instead of waiting for a fault.
When do you need roof waterproofing?
These are the signs most often linked to roof waterproofing:
- The old waterproofing is cracking
- Water pooling on the roof
- Stains on the top-floor ceiling after rain
Where the problem usually comes from
- Cracks in the roof slab — we check this before anything else.
- Wrong falls towards the drains — we check this before anything else.
- Damaged waterproofing around tank and AC bases.
Tools and methods, and when we use them
| Tool | What it finds | When we use it in Allith |
|---|---|---|
| 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 |
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 — Allith
| Item | Value | Source |
|---|---|---|
| Roads | Main roads in or near Allith: Al Laith Road, Amr Bin Al Aas Street | Kashf data (owner) |
| 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) |
| 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) |
Short answers for Allith
What is the first step of roof waterproofing (preventive periodic check)?
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 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 get at the end?
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.
If you live in Allith and are new to the area
- 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.
- 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.
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