Spring is on the way, and that means you'll be opening the windows again to get some fresh air into the house. Before you do, take an inventory of all your windows. Check for torn or missing window screens and replace any that need it. If you spot any discolored wood around the windows, this could be a sign of moisture or rot. Make a note of any damaged areas and make sure to identify the source of the leak in order to prevent additional damage. Then repair the rotted wood along the interior or exterior of the house as the weather allows.