Growing success begins with a Poly Arch. The Poly Arch by Rough Brothers has been designed and field-tested to meet your demanding environmental needs. Whether utilized for production or retail, the energy efficient roof-vented Poly Arch will provide the environment you desire while providing you with the most economical gutter connected structure. Suitable for natural or fan ventilation, the Rough Brothers Poly Arch has a unique roof vent design which allows for maximum cooling: the bottom rail of the vent opens above the ridge, eliminating trapped hot air. An additional benefit of the raised bottom rail is the ability to easily vent regardless of outdoor conditions.