Since 1955 Columbia Skylights, a Canadian company, has manufactured products of the highest quality, designed to meet the challenging demands of our climate. Columbia is the largest skylight manufacturer in Canada, designing innovative products using industry leading materials. Nothing can improve your home like the warmth of natural light and fresh air ventilation. Our excellent warranty is based on the fact we've been in business for over 65 years building products you can rely on.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. Triple glazed LoE3 is ENERGY STAR® certified across Canada and offers the industry's best thermal performance. Include 3 panes of tempered glass.Minimum 3:12 roof pitch is MANDATORY. VSF & OVSF models. ONLY AVAILABLE IN ONT, QC & Atlantic Canada.