I may be able to assist those of you that need assistance on roof ventilation. I hold a number of patents regarding intake vents and other vents to create ventilation in any style building, new or retrofit. I would be glad to help anyone that has residential homes or commercial buildings. We advertise in Fine Home Building among other magazines and think it is a very informative and educational magazine. If you would like to visit my website prior to asking a question, please visit www.DCIProducts.com so you can familarize yourself with some products that are available through roofing wholesalers across the country and Canada. Thanks and I will await some questions on solving some roof ventilation problems you may have.