Solid oak flooring planks (Guestling, Hastings)

These had to be taken out of 2 rooms in my house to insulate underneath. We couldn’t reuse them because the tongue and groove sides had been glued.
Before we dispose of them, could anyone use them to make oak parquet?
There is about 45m2 but some pieces might be a bit damaged.
We’re not sure they should be burned in a woodburner because they were varnished previously.
This could be sanded off.

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