There are a lot of posts on here for fixing up leaky windows. Here's mine.
http://ecorenovator.org/forum/conser...html#post16189
I also did a solar screen project to allow for better cooling of the Den during summer.
http://ecorenovator.org/forum/renova...n-project.html
That one
greatly exceeded expectations!
I don't know if that foam under the siding helped a lot, since it was done so long ago.
IR readings off the walls don't show anything really awful..
Since you have a 1979 house, it might have pretty good insulation.
Check out the attic and see how thick it is up there. You might be able
to add some up there..
In the early 70s, we had an oil scare and people became more aware of Insulation and it's many uses..
One word you used, was
"downstairs".. Do you have an open stairwell?
Because, I've seen a LOT of houses that had big heat losses,
since all the heat was escaping upstairs.. (Making it too hot up there in some cases).
They do okay in the summer, since cool air stays downstairs then..
But don't try sleeping on the second floor during the summer!
