Build my own SIPs, or just frame it?
I am in the planning phase of building a second home and a shop on my property. I have access to as much insulation material as I need in 22″ wide and various length (from 36″ to 64″) rigid foam insulation (door cut outs with the skins still on r 6.25 and 1 3/4″ thick) for free!
Thinking of either constructing sips panels by using construction adhesive to glue the pieces together inside of a plywood and dimensional lumber frame or just framing a double stud wall and filling in the void with the insulation. I am planning on R30 or better exterior walls. Property is located in climate zone 4c.
Building will have to be engineered anyway because of other issues so I would not anticipate a significant change in cost based on which method I use to construct the walls. I also don’t anticipate a large materials cost difference between the two methods (but some careful math is in order).
Finally, if I decide to go with 2×4 framing, I plan to install 2 layers of the insulation on the exterior of the home prior to installing building wrap, rain screen and siding. Other than added labor and trim/ flashing issues is there any compelling reason not to consider this method as a way to prevent thermal bridging etc.?
For a novice builder which method would you recommend as more feasible for construction, permitting and long term durability?
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