Pre-construction treatment for duplexes in Jazan

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

What is specific about Jazan for pre-construction treatment

Team note on Jazan: 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 centre of Jazan sits about 7 m above sea level (SRTM open elevation data).

Jazan is about 1.9 km from the sea coast (OpenStreetMap).

The centre of Jazan sits about 7 m above sea level, and the sea coast is about 1.9 km away. Those two facts shape how pre-construction treatment is planned for duplexes here. A site this close to the coast and this low in elevation stays humid and warm for much of the year, which favours termites and wood-boring insects. Before work starts, the foundations, ground-level walls and timber elements should be inspected and treated, because moisture that collects at the base of a building is harder to correct once walls and finishes are in place.

Each of these conditions has a direct effect on the service. Because the ground is low and the coast is near, soil treatment is usually scheduled before any concrete is poured, so the barrier is continuous under the slab. Termite treatment is priced at SAR 10–25 per m², and the area measured is the footprint and perimeter of each unit in the duplex, so both halves of the building are covered. Bird control, priced at SAR 30–80 per m, is considered early for roof lines and ledges, since nesting sites that are sealed off during construction cost far less to manage than birds that have already settled. Rodent control, at SAR 200–500 per visit, should be planned around the same stage, with entry points around service ducts and drains closed as they are installed.

Owners in Jazan commonly make a few avoidable mistakes. The first is treating only the finished building and skipping the pre-construction soil and timber work, which leaves gaps that cannot be reached later. The second is assuming one visit is enough: a follow-up visit at SAR 100–250 per visit is normally needed to confirm the treatment is holding. The third is leaving the choice of ongoing cover until after handover; a pest-control visit at SAR 150–400 per visit, or an annual contract at SAR 500–1,500 per month, is easier to set up at the start, when the site is open and access is simple. Planning these steps together keeps the duplex protected from the first day of construction.

In a duplex, the two floors often share lines, so tests are done floor by floor.

Signs that call for pre-construction treatment

These are the signs most often linked to pre-construction treatment:

• New land before the slab is poured
• Taking over a new unit

Where the problem usually comes from

• A common cause: site moisture.
• A common cause: untreated soil.

Tools we use in Jazan

The steps in order

1. Site inspection: Soil and moisture conditions.
2. Treatment: Applied at the right construction stage.
3. Documentation: A record for the property file.

Facts and costs — Jazan

Common questions about pre-construction treatment in Jazan

Common mistakes we see

• Postponing treatment until after construction

What you receive

The written output: a treatment report for the property file. The report is numbered and can be checked with its verification code.