Quote:
Originally Posted by hayden55
If you can bury your ducts in insulation and seal your celing and wall penetrations with expanding foam you should be as efficient as the new houses that are spray foaming their roofs but you don't have to air conditon your attic and you can work with what you've got.
|
That expanding foam was used when new windows were installed in my apartment around 14 years ago. By now the building might be around 60 years old...