Antique Pine Shiplap boards were very popular for barn siding and barn floors in the early 1900's.  These boards have laps on both sides, making them more

weather tight than the straight edged boards from the 1800's. 

These boards can be reused for flooring, ceilings or walls. 

Available in weathered and non-weathered boards, 

usually 3/4" thick and 7" or 9" wide.