I have 1920's house in Minneapolis, I'm thinking about tearing the siding off and adding 12" deep Larsen trusses with dense packed cellulose. The guides I've see in Fine HomeBuiding magazine suuggest the best route is apply poly barrier on the outside as the R 40 gain from the trusses would stop any moisure from condensing on the poly. I would use 1/2" plywood for sheathing and a breathable house wrap then a rain screen and siding.
When using larsen trussees, what is the maximum spacing between TJIs
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Followup to the question How do you install Larsen Trusses on a home in Minneapolis?
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How do you do a vapor barrier in a dense pack cellulose wall?
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Can you mount heavy objects to a Passive House Larsen truss wall?
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