As temperatures plummet, drafty windows that once seemed a minor inconvenience can wreak havoc on your morale and your energy bills.  At times, the issue can be remedied temporarily with caulking or weather-stripping, but in most cases the full addressing of the situation requires calling in a reputable contractor who can diagnose the problem and recommend window replacement options.  Here are the five most common reasons drafty windows need replacement. Causes Of Window Drafts 1. Window Seal Failure Argon gas is found in the glass packs of double and triple pane windows.  In the event that the argon gas escapes,…