Darley’s HarbourView Bottom Rolling Multi-Fold Door System is the ideal choice for modern architectural requirements, meeting current design trends as well as performance specifications. The system benefits from weight load being distributed in the sill rather than the head, meaning there is less structural loading in the head.

With self-cleaning roller and highly adjustable hardware, Darley’s HarbourView Bottom Rolling Multi-Fold door system provides users with a future proofing design allowing for smooth operation for years to come.

As with all of the HarbourView systems, the bottom rolling multi-fold door has been tested and exceeds Australian Standard AS2047.

U-value

U-value measures how well a product prevents heat from escaping.

It is a measure of the rate of non-solar heat loss or gain through a material or assembly.

U-value ratings generally fall between 2.0-10.0 W/m2.K for Australian products. The lower the U-value, the greater a window’s resistance to heat and cold flow and the better its insulating value.

Solar Heat Gain Co-efficient (SHGC)

SHGC measures how well a product blocks heat caused by sunlight. SHGC is expressed as a number between 0 and 1. The lower a window’s SHGC, the less solar heat it transmits.

Under the Building Code of Australia, we are required to produce windows and doors that meet mandatory minimum specifications under Australian Standard (AS) 2047 – including AS1288.