In November, Clopay introduced a 3″ polyurethane-insulated door with a calculated R-value of 22.2.
Ideal for temperature-sensitive climates, Clopay’s Model 3730 features CFC- and HCFC-free polyurethane insulation injected between a 27-gauge exterior skin and a 28-gauge interior skin with a thermal break. The sections feature a continuous closed-cell foam tape for additional weather resistance.
The doors include a 4-3/4″ EPDM rubber astragal, 14-gauge hinges, commercial 10-ball steel rollers, and 10,000-cycle torsion springs. The 3730 is available in white or brown and with triplepane insulated windows in select sizes.