Bitumen membrane in Alnuayriyah: before summer & rain season

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

Before we start: what we know about Alnuayriyah

Main roads in or near Alnuayriyah: King Abdulaziz Road. The centre of Alnuayriyah sits about 49 m above sea level (SRTM open elevation data).

Team note on Alnuayriyah: 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..

The most common problem with flat roofs in Alnuayriyah is water finding its way through a membrane that has aged, cracked or lifted at the edges and upstands. Heat in the dry months dries and splits the surface, and when the rain season arrives the water has a route into the slab, the ceiling below and the walls. Bitumen membrane is the usual answer for this type of roof, and the work is most effective when it is done before the hot season rather than after the first leak has appeared. Bitumen membrane is priced at SAR 15–35 per m², and the final figure depends on the condition of the existing surface and the detailing around drains, parapets and roof penetrations.

Alnuayriyah sits about 49 m above sea level, which is a useful reminder that the centre of the town is not a low-lying basin where water collects. Even so, the rain season brings short, intense downpours, and the important point is that water needs a clear path off the roof. A good approach checks that falls and drains are working, so that water does not pond on the membrane for long periods. Because the roof is exposed to strong sun for much of the year, the surface protection and the way the membrane is lapped and sealed at the edges matter as much as the sheet itself. Where a roof has an area that is used or walked on, the approach may also consider whether a liquid coating such as liquid roof waterproofing, at SAR 8–25 per m², is a better match for the surface.

Before the visit, ask the provider to walk the roof with you and explain what they see at the drains, the parapets, the corners and the joints with walls and upstands, and whether they expect to repair the substrate before any membrane is laid. Ask how they plan to handle the existing surface and whether the quote covers removal of old material or only new work on top. Check which elements are included in the per-m² figure and which are priced separately, such as crack repairs. Ask how the work will be scheduled around the hot months and the rain season, and what cleaning and protection will be left in place when the crew leaves. A clear answer to these questions will show whether the proposal fits the roof you actually have.

Checks before summer and before the rain season catch problems while they are still small.

When do you need bitumen membrane?

If you notice one of these signs in Alnuayriyah, it is a good moment to talk to the team:

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

Causes we see in the field

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

Tools we use in Alnuayriyah

How the work is done, step by step

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.

Quick comparison: facts and costs in Alnuayriyah

Short answers for Alnuayriyah

Common mistakes we see

• Leaving the membrane exposed without protection

What you get after the work

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