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(mander.xyz)
A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.
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I've not tried tin foil. The insulation seems to be more robust, and it wants to lie flat. It's also optimised for IR reflection, tin foil isn't.
Downside, it's a near perfect blackout material. I only put them up when it's going to be ridiculously hot, and only on the sun facing side of the house.
Might give it a try, wonder how long before my cat decides its a scratch toy though. Another benefit to external window films.