Double panes are installed. Minimum windows facing the road 200+ feet away through woods. Patio door isn't in yet so when the pileated woodpeckers are calling from a tree 20' from the house it sounds like they're inside! Anyone who doesn't know pileated's; they're the size of a raven or small hawk and have an extremely loud call. Think woody woodpecker obnoxiously loud only the whole head isn't red, just the crest. Really cool birds. They're big and don't make wood chips, they make wood chunks...