My house was built in 1995 and I have an enclosed sunporch. I want a wood floor - but not really a "hardwood" floor. In September 2008, page 36 there is a floor of barn wood -- are these boards just butted against each other (which is what I have thought of doing) or have they been routed with a tongue and groove. What would happen if I used 1x6's and butted them together for the floor? This area is not heated during the winter.