Can I add Larsen Trusses and cellulose to 1920s House in Minneapolis?
Ken TraefaldFeb. 17, 2020Last updated: Sept. 9, 2020
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.