Insulating using the 1/3 2/3 rule in zone 7
I would like to get some opinions on the 1/3 2/3 rule for applying insulation in walls in Quebec, Canada. Could one get by applying the rules for insulating the sheathing noted in the GBA article "Calculating the minimum thickness of rigid foam sheathing" (http://www.greenbuildingadvisor.com/blogs/dept/musings/calculating-minim...)? For our region we would need to add R-15.
The proposed approach in our building is to insulate the 2x6 wall cavity with cellulose or roxul and insulating over our sheathing using cellulose or roxul filled larsen trusses. One other thought is to apply roxul ComfortBoard IS to the outside.
Posted Tue, 02/19/2013 - 10:34
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