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.
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.