Rob R. The foam board insulation in the downstairs will have to come out when I remodel that area, Right now the downstairs is the living room, kitchen and dining room. It will be gutted to the walls and turned into the a larger kitchen and dining room. The concrete floor will be torn out and a new one poured with pex in it for heat. One zone for the kitchen and one for the dining room.
The addition will be the living room, it will also have a bathroom in it, the floor will be radiant also. I am going to have a wood/coal stove in there for emergency heat also.
Once the addition is finished the outside of the house will be sided with vinyl, the areas of the walls that are exposed block will be Strapped and an 1-1/2" of foam board insulation added between them then on the areas that are framed will get a 3/4" of foam board insulation. Then the whole house will get wind barrier installed and the siding put over it.
Fuel prices are not going to go down anytime soon.
So I would rather spend the money on insulation than wish I had.
Burning wood for the past 20 years has taught me that it is not the way to go. With the stove I have right now I burn 6 - 8 cord a year to heat the house. Burn 100 to 150 gallons of fuel oil to heat the existing shop on days I am working in there and my shop building is getting to the point it needs replaced.
With my height restriction here in this township I decided to stay at 12' eaves and not have to get a variance, that means the roof had to be a double "shed" style, outside it looks like a regular gable roof but inside it is open to the peak.
Sting, that is the rub here, not many coal boilers survived here. Coal stoves are around but not many boilers.
I have been looking at the different manufacturers sites to get an idea of what is available.
No big hurry right now as I am still in the research phase of this project.