Bitumen membrane for residential buildings in Allith

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

What is specific about Allith for bitumen membrane

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).

Is a bitumen membrane the right choice for a house in Allith, given how close the area sits to the coast? Allith is about 1.2 km from the sea coast, and its centre sits about 5 m above sea level. That combination means damp air and salt-laden conditions are part of daily life for many buildings here, so roofs and below-grade walls need a reliable barrier. A bitumen membrane is priced at SAR 15–35 per m², which places it among the more affordable options when compared with epoxy coating at SAR 35–90 per m² or basement waterproofing at SAR 50–150 per m². Owners weighing cost against coverage will find it a practical middle ground for many residential roofs.

When a technician visits, the inspection usually follows a clear sequence. First, the roof surface is walked and checked for cracks, blistering, ponding areas and any lifted edges where the existing layer has separated. Next, the joints, parapets and drainage outlets are examined, since these are the most common points where water finds its way in. Where cracks are visible in concrete surfaces, the technician notes their length, because crack injection is priced at SAR 40–120 per metre and must be measured before a quote is set. Finally, the bathroom and any ground-level or basement walls may be checked for moisture, as bathroom waterproofing is quoted at SAR 15–40 per m² and basement work at SAR 50–150 per m². Each finding is recorded so the owner can see exactly which areas need attention.

Before the visit, it helps to gather a few things. Know the approximate roof area in square metres, since bitumen membrane pricing is calculated per m² and an accurate figure makes the estimate more useful. Note any past leaks, the rooms where stains have appeared, and the dates they were noticed. If the building has a water tank on the roof, mention it, because tank internal coating is quoted at SAR 25–60 per m² and is often reviewed in the same visit. Clear access to the roof and any basement or utility areas will also save time on the day. With this information ready, the inspection can move quickly and the owner can compare options with confidence.

For a whole building, a survey of the shared systems comes before unit-by-unit work.

Signs worth paying attention to

These are the signs most often linked to bitumen membrane:

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

Causes we see in the field

• A common cause: no protection layer.
• A common cause: seams that were not welded properly.

Tools and methods, and when we use them

From the first visit to the report

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

Short answers for Allith

Common mistakes we see

• 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.