https://475.supply/en-int

2025 — PHI EnerPHit certification

A 100-year-old masonry carriage house in Brooklyn, transformed

into a foam-free, net-positive energy office, warehouse, and

showroom for 475 High Performance Building Supply.

— 99% foam-free enclosure with Rockwool Smartrock continuous

mineral wool insulation — first North American application

— Smart vapor control membrane with liquid-applied air barrier

for a thermal bridge–free shell

— Brink FLAIR ERV/HRV — PHI-certified heat and energy recovery

ventilation

— Triple-pane skylights for natural daylighting

— 8 kW rooftop PV array, net-positive energy production

— Nail-laminated timber (NLT) structure, 3-6-9 pattern

The building also achieved independent Phius certification,

becoming the first project in North America to hold both

PHI and Phius credentials simultaneously.