Originally published in Roofing Elements Magazine, July 2022.


Four days before Christmas 2020 I received an email from Ron Bastian, owner of Bastian Roofing, Richfield, Wisconsin. It included a series of photographs showing significant wood rot in a roof deck with the following short note from Bastian:

“The attic insulation is packed tight to the bottom of the roof deck and caused a lot of rot in three years. We did this roof 18 years ago and someone came along since to add insulation. It’s not fun tearing up my old work. This is not the Christmas present the homeowner wanted, I’m sure.”


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Additional Resources:


PodcastPodcast: Airing it Out with Air Vent, Episode 22: Insulation Mistakes that Impact Attic Ventilation

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