I understand this is a DIY forum. The wife and I started this project and I became ill.
I am no longer able to do anything for more than about 5 minutes so we had the job finished
by someone else
I wanted to show this as some of the short falls
We installed 4 x 8 sheets of insulation using the pink foam type board.
Do not make that mistake use the 3/4 or 1 inch insulation with the foil backing. It is a little cheaper and has a better R factor than the other.
Make sure to install it first
The 2nd thing is use the Tyvek wrap and do as it says there is a lot of video on this and well worth the time doing it right. Our guy did not do all of it the same and we can tell the difference
Make sure you cut in the windows and lay it over and tape as it states
The insulation and the tyvek can be easily done by a DIY person if you follow the directions
The siding is the same way you can find a lot of info on the net
Be sure to start your starter course correctly if you don't then you are in trouble
As for windows do not use the cheapest ones out there go up a grade or two
Our windows are a real hassle to get the screens in and takes two people ,they also have warped really bad from the heat .
I do not think all windows do this ours are vinyl. We did not use the gas filled I think that is not needed just a good storm window does fine.
Be sure to put silicone or caulk around the window before installing