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Frost Feather

Frost Feather
Frost Feather

This Frost Feather was actually on the bottom of a very well insulated window taken from the inside out with a flashlight doing the highlighting. Dark as pitch outside. COLD AS HECK…

Seeing this as it was small…

This was a TINY 1/2 inch growth which was just screaming to take it’s photo as frost is so Fractal in it’s design by the master architect of such things. Window frost forms as a pane of glass is exposed to sub-freezing temperatures on the outside freezing the relatively moist air on the inside.  Water vapor from the air condenses as frost on the inside surface of the window.  The picture above demonstrates a patch of window frost about the size of U.S. Quarter Coin. .  Window frost often makes elaborate patterns as the crystal growth is strongly influenced by the window surface because scratches, residual soap, cleaning streaks, etc., can all modify the way the crystals nucleate and grow.


Window frost was more common in the before about the 1970’s, when houses still had single-pane windows.  Snow used to actively blow in the windows of the 1970s ranch house we first moved into up here lol. The newer double-pane windows are working far better insulators and thus not so cold on the inside surfaces. Frost can cause damage because as it melts, it transfers moisture to whatever is next to it. If that’s a wooden window, it can discolor varnish and crack paint or even damage the wood. Frost can also melt off single-paned windows and seep down into a wall. resulting in damage of one kind or another.

If moisture is not handled swiftly and completely, mold can begin to grow. Keep it warm and dry inside to avoid the frost. A dehumidifier will help. But the best way is to replace older inefficient windows with double or triple layer windows. Boy they make some nice ones these day lolol. (Ours are 20 years old and one just lost a seal 😖. ).

We had a lot of moisture/rain/snow today. Wet year overall so far.

Location: Bliss DInosaur Ranch, Wyoming/Montana borderlands.

Frost Feather18 x 18 inch square aspect.