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Cold weather stud finder
(thelemmy.club)
Share your self-made stuff and half-baked projects here.
Also check out !diy@beehaw.org
There is also a related XMPP chat.
Coincidentally, it is cold here too. Walked around the house with a USB drone camera. Window edges are radiating like crazy. There was no difference between a window with shades down vs. a window with shades up (I hoped to find a difference, but was disappointed). However, edges need considerable extra foam.