jetsam
Minister of Fire
Thanks we like em both too, I do have double pane vinyl replacement windows they still bleed some air where the top sash and bottom sash come together in the middle. We replaced all 24 single pane windows many years ago.
We have Insulated all we can in the walls and 12" in the attic as well. The main issue is this is a two story house and the stairway is a giant passage way for heat as well as people up to the second floor which we do not use often. We have a second bath up there if not for that I would build an insulated doorway to close it off for the winter months. I can get the main house up to 68-72 but that's it.
We have a forced hot air furnace in the cellar for back up in case of a winter trip or something, but keep the thermostat set to 60* so it does not come on too much. We also have a 20x20 addition off the main floor Bedroom bath and walk in closet . That whole area has radiant floor heat,.. we have an on demand gas hot water heather for that system.
So the stove is really the main source of heat for the home really the radiant heat is good but the stove helps it a bunch I think, keeps it from running too much.
Another issue is the cellar it is not heated and some of the cold seeps up into the main house above. It would benefit from spray foam but with all the wiring and plumbing on the cellar ceiling not sure how that would all work out... Ya know burying all that under insulation and all.
If your windows are leaking between sashes, contact the manufacturer and tell them you need replacement weather seal for that area. Might be free. (Could also be a bowed sash or an out of square frame.)
Basement-wise, if the walls are dry, consider studding them out with 2x4- that lets you put R15 up, and if you want to get fancy you can also put up drywall and call it a 'finished basement'. Insulating the walls and floor of a basement can help it to be less of a heat sink- but I'd bet you could get more bang for your buck elsewhere first.