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I know it'll be ugly but need to temporarily board up a window

I know it'll be ugly but need to temporarily board up a window


Old 06-21-17, 06:21 AM
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Join Date: Sep 2003
Location: Arlington, VA
Posts: 811
I know it'll be ugly but need to temporarily board up a window

I'll be boarding from the inside since this is not for security purposes but rather insulation purposes.
What is the lightest weight material that provides the most insulation, dryboard?

Last edited by MichaelChang; 06-21-17 at 07:36 AM.
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Old 06-21-17, 07:39 AM
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Join Date: Oct 2004
Location: WI/MN
Posts: 18,657
Rigid foam is what's coming to my mind.
Old 06-21-17, 08:56 AM
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Join Date: Mar 2003
Location: NC, USA
Posts: 17,767
Many big box home centers only stock 1/2" thick foam but if you check with a lumber yard they may have thicker. My local Lowes only carries 1/2" thick but my local, independent lumber yard stocks up to 2" thick.
Old 06-21-17, 09:01 AM
Join Date: Oct 2008
Location: New England
Posts: 9,996
Hi Michael. Covering the inside with rigid foam can be a problem with some windows because of their solar properties. it traps too much heat. if plain glass single or double pane it should be fine.

Since windows are such a poor insulator a major improvement can be achieved with just 1" of standard pink or blue foam board (r-5 per inch). Using polyisocyanurate at R-6.5 per inch is a bit better and usually comes with a foil face. I would leave the shinny side to the inside and perhaps paint the outward side white.


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