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Frost Heave

Over the past two or three days, frost heave has caused the 16X12 deck (housing my Beachcomber 720) to elevate on one side. I now have about 1.5 inches difference in water level from one side of my tub to the other. Water is still freely entering the filter chamber so the tub should be fine (?) and I have no real concerns about the overall structural integrity of the deck - it's built with tripled up 2X10s and single 2X8s. This is our first winter with our new tub so I was wondering if this is common for others and if you are still able to enjoy your tub on a temporarily uneven deck... as I assume the spring thaw will revert everything to even again?

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