Once you’ve made a decision what variety and thickness of window insulation kit works to suit your needs, you’ll really need to buy them. If you know your window dimensions and the volume of windows you’ll be masking, a little bit back-of-the-envelope math can inform you what number of kits https://blackheadsonnose14680.answerblogs.com/34847411/new-step-by-step-map-for-window-retrofit-kit