Buying A New Roof Part 4.1 – Ventilation

August 14, 2013 | Filed under: Buying A New Roof series, Home Ventilation, Roofing Help, Roofing Help Videos

Re-roofing your home is the time to also consider your ventilation needs. As we make our homes more weathertight, they often need more ventilation. Todd shares insider knowledge on how to address the ventilation needs of your home.

todd Miller

has spent his entire career in the metal building products manufacturing industry. He is president of Isaiah Industries, an organization recognized as one of the world’s leading metal roofing manufacturers. Todd is currently Vice President of the MRA (Metal Roofing Association) and a Past Chair of MCA (Metal Construction Association). Through his website, he strives to raise the bar on standards and practices to provide property owners with the best possible products for successful roofing projects.

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2 responses to “Buying A New Roof Part 4.1 – Ventilation”

  1. christopher garrett says:

    Hello Todd, we are installing a 36″ sheet steel roof for a client. We will be installing a 1″ poly iso insulation as well. Question is where to install my underlayment? To the deck itself? Thinking about picture framing the roof top with 1×4 and filling the gaps between with the iso. Should I strap on top of that again? Thanks for your time Todd.kindest regards.christopher garrett

    • toddmiller says:

      Thanks Christopher. There are always many variables as you know. However, assuming this is “normal” construction including a vented attic,you should not need the strapping. I would put the underlayment on top of the iso. I assume you’ll be using a synthetic underlayment of some sort? Good luck. Feel free to contact me anytime. You can always just email me at

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