by Guest » Thu Sep 21, 2006 11:00 pm
If room is 12' x 12', perimeter (sum of four sides) is 48' The first tier of your border will be 48 linear feet long. 2nd and 3rd will be slightly less, but just go with 48 x 3 = 144 linear feet of darker border.
Balance of roim will be just under 11' x 11' because of width reduction of border. Just assume 11 x 11 = 121 sq ft.
Because boards are 2.25" wide, each square foot requires 12/2.25 = 5.333 linear feet, so 646 linear feet.
I would boost both those numbers by at least 5% allowance for miscuts, waste, etc.