[Fat Charlie]

Bubble wrap is good extra insulation. My garage doors are on the upwind side of the house and I've got heater pipes above them. The pipes have frozen twice (-20F winters). I bought some rolls of bubble wrap with mylar at Orange Depot and now a few CFLs keep the garage from freezing. The heating pipes are nice and safe.

A couple years ago I got tired of my daughter's room being too cold so I bubble wrapped window. Then she started to complain that her room was too hot. Now I've got layers of bubble wrap for all of our upstairs windows in the winter. The wife fliped out at first, but I explained that when we're home it's dark and the shades stay down all the time- so the wrap isn't taking away any view. The bubble wrap is clear so if there is any sunlight, it'll come around the shades just like it always has.