Controlled Flow Seamless Eavestrough, owned and operated by Jeff Sinclair of Chatham, Ontario for over 5 years independently. A successful family based business, growing to accomadate many contractors and private home owners from Windsor to London, Ontario. By using high quality products and materials, we offer a wide range of potential for your home or business needs and welcome the chance to meet with you to discuss what's best for you and your home.