Part M weather tested threshold

The Alumina aluminium bi-fold door has been weather tested at its maximum door size with a thermally broken low threshold – achieving incredible results.

The 2.5m x 1.2m aluminium sash bi-fold was found to beat the minimum requirements for both air and water tightness by more than double the most severe pressures within BS6375 Part 1 – even with a low threshold – which is highly unusual for a bi-fold of this size.

Full Tray

Low Threshold and Full Ramp

  • 26.5mm high
  • Makes the low threshold Part M compliant for wheelchair access
  • Requires no trench excavation, so is simple to install

Find out more about the other threshold options available for the Alumina bi-fold and discover your ideal bi-fold configuration here.