This is the second winter we are using bubble wrap to insulate most of our windows at home. It’s turning out to be a great way to keep the house warm and is very inexpensive as well.
Currently, we bubble wrap all windows that isn’t being used for our viewing pleasure (ones that are mostly covered up by shades).
This technique if fairly quick and simple, all you need is bubble wrap and water. You can use this for all types of windows. The only downside is that you can’t get a clear view, but you can still get sunlight coming into your house.
If you would like to have a decent view, I suggest using larger size bubbles. Click the link below to get step-by-step instructions (with visuals) on how to insulate windows with bubble wraps.