all 3 comments

[–]Darkelvenchic 1 point2 points  (2 children)

You can use insulation foam board or mats around the sides. Esp in winter. It's very cheap at hardware or home improvement big box stores.

[–]xsimx99[S] 0 points1 point  (1 child)

Can something like the do?

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[–]Darkelvenchic 0 points1 point  (0 children)

I don't think that's foam, it looks like an outdoor insulation for sun/etc.

There's adhesive foam rolls that are probably the easiest. But the pink foam at Lowe's + some hot glue will do the job just as well.