Proposed recycled polyiso wall insulation question
I am remodeling a old house located in Rochester NY and the climate zone is 4 and 5 marine. The exterior is covered in vinyl siding installed over unfolded 3/8″ foil faced EPS which covers beveled cedar siding. I have demolished the interior and exposed the 2″ x 4″ walls cavities and was wanting to provide an air barrier without removing the exterior at this time. I am proposing a wall section of:
Drywall over 2″ wood horizontal strapping ( paper faced Iso or XPS between strapping as a thermal break to the exterior studs), OSB plywood glued and nailed to the inside face of studs for structural stability ( the house creaks a lot in our high winds), 2″ x 4″ wall cavity with 3” or the combination of 1 ½ and 2” paper faced ISO foam boards to equal a 3 ½” paper faced ISO, ¾” T& G sheathing, tar paper, beveled cedar siding, 3/8″ foil faced EPS, vinyl siding.
**An alternative would be a second interior 3 ½” wall staggered in front of existing wall instead of the horizontal strapping, with a layer of XPS on the interior of the existing wall(though still sheathed in plwood for the above reason).
In the future I would like to remove the vinyl to be able to remove the beveled cedar siding and install a 1” continuous layer of foam insulation, unfaced or paper faced, no foil, and then a good house wrap in order to detail the windows and flashing that are now non-existent .
Any review of the section and recommendations would be greatly appreciated.
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