If your windows leak, wind or moisture can enter throughs or unsealed joints. Drafts can increase the cost of your electric bills by allowing warm air to escape or enter your home around the .Here is the definitive list of Henderson’s window repair companies as rated by the Henderson, NV community. Want to see who made the cut?.Water leaks from window frame What kind of professional do i need to diagnose and repair the issue? General repair? Ask Your Question..Short of tearing out the window and replacing it, what can be done to determine the actual source of the leak, and how can it be fixed? J.G..