The main rule of insulation = If there is an air space on the cold side, it  needs to be vented.  If the space can not be vented, make sure there is no air space. (click here for insulation terms)

 THE PROOF IS IN THE PUDDING PICTURE!

This homeowner was experiencing high energy bills and was in need of better insulation in the stud cavities and roof. You can see the difference below, with the infrared camera picture taken before and after the job.
This is the picture taken with the infrared camera before the job. It shows heat loss coming through the walls and roof.
This is the picture taken after the job was done. The difference is dramatic. The homeowner is now paying significantly less on his energy bills, and he can physically see the difference.

DID YOU KNOW YOU COULD QUALIFY FOR A TAX CREDIT ON INSULATING YOUR HOME? (click here for information)