Any is better than none, except for OBS ply sheets...1\4" -3\4" will work, naturally the thicker the better. Best quick attachment are tampcons, 3\16" drill bit, U need a drill & driver, bits are sold w\50 count or larger. Good luck....and remember, anything is better than nothing.
Regular 3/4 inch
Dont wait until the storm because you will not find a single sheet anywhere in the state. Before the storm, take measurements so you will know what you need and get them beforehand
If you have a mobile home how much wider than the window do you measure for it?
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