Redditor golftree has a composite deck. After a recent freeze, s/he found that one plank didn't cover with frost and is curious about why. The funniest proposal is from austin101123, who writes:
That board was probably placed upside down on accident, check for frost on the other side.
What's your explanation? Why did this one plank in the middle of the deck not frost over?
It's defective!
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It's probably a random untreated plank that got in with all the weather-treated planks. The water is absorbing into the wood while the sealed planks repel the water which has nowhere to go but form a frost on top.
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