How do I insulate my home to reduce cold and flight noise ?

My home is getting very cold this winter, easily going down to 50 degrees. I also hear flight noise though my home is not in the flight path. In general, noise insulation is poor in my home. I want to know what I need to do to diagnose the problem and solve it.

If you have a recommendation for any good local business in san jose to solve these issues, that will be great too.

Often the solution to both noise and heat escaping from your house is to add double paned windows to your house. This is often very expensive, unfortunately, but you can call a windows specialist from the Yellow Pages in your area who can come and give you an estimate. If windows are old, rattly, and don't fit very well in the frames, it's likely cold and noise are getting in and it's time to replace your windows.

A cheaper, but less attractive alternative, is to get heavyweight clear plastic and line your windows with in in the wintertime. This is a lot less expensive, but it reduces the light that comes into your house and isn't as attractive. My parents did this when I was growing up, and it cut down the electric bill a lot. You can get this at Home Depot or other hareware/home supply stores.

You can also insulate the attics and walls of your home as well. This is also expensive because you often have to get into the walls of your house to do it, but you will often make up the difference in electric bills over the life of your house.

There's some good information about insulation in the link below.

I've heard of window plugs. You should check them out: http://store.yahoosoundproofing.com/soundproofing/winsoun.html