Looking for advice on adding insulation and air sealing to an old farmhouse, located in Dutchess County, NY climate zone 5. Here’s some background:

The homeowners are looking to purchase an old farmhouse built in the early 1900s and want to make it their forever home and do things right by tackling the fact that the house is very drafty and poorly insulated. No plans to renovate from the interior any time soon, so insulating and air sealing from the inside is not an option.

Proposed solution: Demo the stucco on the outside (Have never done this so not quite sure the exact assembly that is there or how daunting of a task this is) and strip it down to what is assume is board sheathing? Timberframe with nogging? Depending on the exact assembly, either add zip sheathing or a self adhered WRB like blueskin, add rockwool comfortbaord insulation, and then install furring and new lap siding. They are open to replacing the windows with a historic reproduction so doing it at this stage would be a no brainer.

I will attach some pictures for reference. Would love some insight on the staining as well if you have any. Red staining is face the north side.

Thanks!!

-Dan