PU Void Filling to Prevent Settlement — Bangkok Bank, Rama 3

At Bangkok Bank's Rama 3 branch, the concrete slab around a gas control/metering station had begun to settle because the soil beneath it had washed out, leaving voids underneath. Left unchecked, the slab could drop and affect critical utility equipment. URETEK resolved it with PU Void Filling — injecting expanding polyurethane beneath the slab, with no need to break out or dig up the floor.

🕳️ The Problem: Voids Beneath the Slab by the Gas Station

Soil under the slab had been washed out or had subsided, creating cavities (voids) beneath the concrete. The slab began to settle and separate from its footing — and next to live gas piping and equipment, that calls for a careful, prompt fix.

🏦 The Brief: Work at a Bank, Without Disrupting Service

This is an operating commercial site with people on the premises and a live gas system. The repair had to avoid open excavation and heavy vibration, and could not disrupt the bank's opening hours.

💠 The URETEK Method: PU Void Filling — No Digging

We drilled small holes through the slab and injected polyurethane resin underneath. The resin expands and flows to fill every void and compact the surrounding soil, restoring full bearing support beneath the slab and preventing recurring settlement — all without excavating or removing the existing floor.

🌙 Clean, Fast, Overnight Work

The crew worked overnight to avoid affecting business hours, using compact equipment, keeping the area clean, and clearing up before opening. The slab carries load again as soon as the resin sets.

✅ The Result: A Stable Slab, Back in Use Immediately

The voids beneath the slab were filled, the slab is stable again, and settlement has stopped — with no lengthy closure and no major earthworks. Ideal for commercial buildings and infrastructure that must stay in continuous use.