Reduce Heat Loss With Thermal Panel Window Insulation

Two simple, inexpensive ways to cover large windows.

Pop In Shutter
The pop-in shutter is one variety of thermal panel window insulation. After assembling a wooden frame to fit your window, lay it on a sheet of insulation so you can mark and cut out the beadboard. Do this again with another piece of insulation so that the shutter will be two layers thick.
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