Since 1955, Columbia Manufacturing Co. Ltd., the leading Canadian skylight manufacturer, has produced products of the highest quality, designed to meet the challenging demands of our climate. Our product line is innovative, and utilizes industry leading materials. Our gold standard warranty supports our product line, and it has withstood the test of time. Columbia has been building skylights that you can count on, for over 65 years.This Columbia Venting Self Flashing glass skylight is designed for the do-it-yourselfer with built in white vinyl curb and flashing, saving you time and money. Includes our Condensation Control Technology, a wide rigid gutter that prevents water staining in your light shaft.LoE3 clear glass is the industry standard and features a dual pane filled with argon gas, providing superior condensation resistance and blocks 95% of UV rays. MINIMUM 3:12 ROOF PITCH IS REQUIRED on VSF & OVSF models. Available in ONT, QC & Atlantic Canada.