Re: Wood flooring, expansion in boarders
The size of the expansion gap will be relative to the size of the wood flooring area. A large room, say, 16x16 is going to have far more expansion and contraction than a room, say, 5x5. You will have more movement over a raised foundation than you will on slab, because an elevated floor will fluctuate in temp and humidity more than a slab will.
Going around an island, as in your example, the gap will be commensurate with the space between the island and the next solid object. I would not leave more than maybe 3/8" - 1/2" for a walkway of 4'or 5' wide and up to the suggested 3/4" on the dining room side where there is a larger expanse of material to move around.
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