Bitumen membrane for villas in Allith

Prepared by the technical team · editorial review · last updated 13 November 2026 · Sources

Before we start: what we know about Allith

Main roads in or near Allith: Al Laith Road, Amr Bin Al Aas Street. The centre of Allith sits about 5 m above sea level (SRTM open elevation data).

Allith is about 1.2 km from the sea coast (OpenStreetMap).

Allith sits about 5 m above sea level, and its centre lies roughly 1.2 km from the coast. For villa owners, that combination means a dry, sun-exposed setting with salt-laden air drifting in from the shore. Roofs here take strong daytime heat and the occasional rain shower, so the membrane needs to handle thermal movement as well as water. Because the land is low and close to the sea, we check drainage paths and roof falls carefully before any bitumen is laid.

The practical effects follow from those facts. The modest distance from the sea means salt can reach exposed flashings and parapets, so we pay close attention to edge detailing and upstands. The elevation of about 5 m means rainwater has little natural fall in some plots, so we confirm that outlets and gutters carry water away quickly to prevent ponding on a bitumen roof. Bitumen membrane is priced at SAR 15–35 per m², and that range reflects how much preparation the substrate needs, how many laps and upstands are involved, and how the surface is finished against heat. Owners comparing it with liquid roof waterproofing at SAR 8–25 per m² should weigh the membrane's stronger sheet build against the lower entry cost of a liquid system.

Owners in Allith often make the same few mistakes, and our crews avoid them. The first is laying bitumen over a damp or dusty deck, which stops the layers from bonding. The second is skipping the upstands at walls and drains, where most leaks start. The third is ignoring existing cracks; a crack that is not sealed first will telegraph through the new layer, and crack injection is priced separately at SAR 40–120 per metre. The fourth is leaving the roof unprotected from sun, which shortens membrane life. Addressing these points at the start keeps the finished roof dry for years.

In a villa, tanks, the roof and the yard lines are usually yours to look after, so it helps to know where the main valve and tank hatches are.

Signs that call for bitumen membrane

The following signs are worth checking before they grow:

• A flat concrete roof that needs waterproofing
• Old rolls that are cracking

The most common causes

• No protection layer — we check this before anything else.
• Seams that were not welded properly.

Tools and methods, and when we use them

The steps in order

1. Preparation: Cleaning, priming and repairs.
2. Torch welding: Overlaps are welded and checked.
3. Details: Upstands, drains and bases.
4. Protection and flood test: Protection is laid after a successful flood test.

Facts and costs — Allith

Questions from Allith

What we advise against

• Leaving the membrane exposed without protection

What you receive

You receive: photos of the welds and the flood-test result, in a technical report with a verification code.