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

MichaelChang's Avatar

Join Date: Sep 2003
Posts: 749

06-21-17, 06:21 AM   #1  
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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stickshift's Avatar
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Join Date: Oct 2004
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06-21-17, 07:39 AM   #2  
Rigid foam is what's coming to my mind.

Pilot Dane's Avatar
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06-21-17, 08:56 AM   #3  
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.

Bud9051's Avatar

Join Date: Oct 2008
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06-21-17, 09:01 AM   #4  
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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