I guess it would really depend on what type of home, the age of it and where it's located. Most of your older homes (prior to 1940) have a lot custom details you want to keep intact. If it's really ol ... read more
Verify that all window and door seals/weatherstriping is in good shape.
Check to be sure doors and windows are caulked properly (no gaps, cracks or missing).
If you have an attic access, treat it like ... read more