Most "high dollar" motorhomes have either ceramic, porcelain or marble tile flooring to go along with the "hydrophonic in floor heating". They use a "flexible grout" which doesn't break as easily as the cement grout used in S&B flooring. Typically, you'll see the tile break rather than the grout separate.
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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