They will need to address these alterations in the workplace which adds no money to their pocket and brings more problems, not related into the work, for them to deal to. Air leakage is simply the holes and gaps left by builders, electricians, plumbers, and heating contractors. http://Www.nuursciencepedia.com/index.php/Must_Have_Tools_-_Tools_Every_Single_Home_Owner_Must_Have_For_Household_Repairs