Zone 5, on the water in CT.

I have so many questions I don’t know where to begin. We have an architect on hand but no plans yet. We have met and like a local contractor/builder and he’s very reputable. There have been 5 additions over the years and a few may need demo and new foundations. No big deal if so.

Project scope is new roofs, windows, siding, doors, some walls moved, new kitchen and baths. Electrical and plumbing will most likely be totally replaced. Please don’t recommend a bulldozer. We like the house and there are zoning issues.

1) With the siding gone we will most likely have 1 x’s as sheathing. Would you recommend removing the existing boards and going with Zip and then insulating the outside, or going with a house wrap and then 2 inches of Foam board or Rockwool over the existing sheathing? Rain screen and cement board would follow either.

2) We’re thinking of removing the interior plaster and going with 2 inches of Spray foam inside the walls. With the exterior insulation we should more than meet code. Opinions?

3) I’m really interested in SHUCO windows but for the life of me can’t find any pricing whatsoever. Anybody?

4) We currently have oil/steam heat and it’s gotta go. No A/C. It’s a small 2 story home with attics and a basement and I’m not really thrilled with running duct work throughout. Should we go with a few mini splits and call it a day or bite the bullet and install the ducts?

What about water radiant floors for the 3 season porch and the 3 bathrooms? We could install a separate air to water HP for those and the DHW but then they won’t have A/C. ARGH!

Maybe electric radiant for the baths…

5) We are attempting to build as tight an envelope as is feasible with an old home. Same question as above for the roof. Should I just make a Zip sandwich on top of the roof sheathing with foam board in between, with the spray foam underneath on the rafters?

Thanks in advance. Not our first rodeo but we know just enough to be dangerous. LOL

Nick