With green remodeling, the home owner is concerned with breaks in the thermal envelope where air infiltration will occur.

Although it sounds simple enough, looking for breaks in the envelope is best done by a professional  with a blower door test.

This test, also called a door rater test, is employed to determine the air leakage in a home. It uses a variable-speed fan to pressurize or depressurize a house. ...

Once the breaks are discovered,  the infiltration can be minimized. 

See thermal envelope

Contact Terry Jensen at 972 251-1532 or 817 545-0140.