Should you insulate an A-frame cottage with cathedral ceiling from the exterior or interior?

J Genereaux
Updated: Oct. 31, 2020

We have a 20'x30' Aframe cottage that we have started a reno on.  We have removed the panelling inside and the outside boards are visible and in great shape.  Shingles were incorrectly installed though, so need replaced,  and we were planning to put a steel roof on instead.  The boards inside are exactly the look we are wanting inside.  We were going to create an air space on the boards, put the panelling back on and insulate before adding our interior walls of new tongue and groove.  However is there a way we could keep the interior as it is, and insulate on the outside? We then have to figure out a way to hide the wiring.  It is located in Ontario where winters can vary between freezing and -20.  Thank you!

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