Should I insulate just my single pane windows or my new windows as well? Also should I put the plastic on the inside, outside or both? Thanks.
Not outside at all Use the wrap on all windows double panes too cuz it all helps here's how tape the double side tape to the moulding of the window not the window itself or wall because the more air space the better here place wrap on the tape secure so no gaps or airspace use hair dryer to shrink use good stuff foam (have nail polish remover and latex gloves) on half inch or bigger gaps around the house and caulk the rest
Plastic on the inside. Putting it outside will subject it to wind and weather. It will be noisier and will not last all winter. If your new windows are double or triple pane, I would not do them. Look for places where drafts come in around windows, doors, fireplaces. Many of these can be sealed with caulk and are very efficient.
