I saw styrofoam pads at ECSS Hoofcare products, but I'd rather have a sheet of styrofoam on hand that I can cut to size.

What kind of 2" thick construction-grade styrofoam do you source at a big box store like Home Depot? I find rigid styrofoam foam board for insulation in 4x8 ft sheets with about 5 different R-values. Do I want R-10? R-5? R-7? I don't think I can buy the blue board in California, only the pink board. https://www.homedepot.com/p/Owens-Corning-FOAMULAR-NGX-F-250-2-in-x-4-ft-x-8-ft-SSE-R-10-XPS-Rigid-Foam-Board-Insulation-52DDNGX/315197962

Differences described here:
 https://bernardibuildingsupply.com/buy-insulation-supplies-toronto/the-difference-between-blue-and-pink-foam-board-products/
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Cass, Sonoma Co., CA 2012
ECIR Group Moderator
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Usually, the R-value is related to the thickness of the board - the thinner the board, the lower the R-value. You don't care about the R-value, just the thickness of the board, so go with the 2" thick one.

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Lavinia
Jan 2005, RI

Moderator/ECIR Support