I recently purchased a 1927 Colonial in Long Island, NY. The first floor has pine (original to the house) layed over a tongue in groove subfloor, running the SAME direction as the subfloor boards (?). The pine is in good shape, as is the rest of the house. What I would like to do is lay oak over the pine running the opposite way (90 degrees) using the the existing pine like a second subfloor, for strenth and stability. Anybody ever do this?