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cookerg t1_j5ku5sc wrote

I was told the bottom is left slightly open to accommodate the floor expanding and shrinking due temperature and humidity changes.

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3Dinternet t1_j5l6lug wrote

Yes many types of floors are "floating"

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cookerg t1_j5lgsqi wrote

I did some more research, and some supposed experts recommend flexible caulk that allows the floor to move but still seals out drafts insects etc.

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