Step 1
Start in a corner and measure and mark the subfloor at two foot intervals from the corner along both walls.
Step 2
Mark the subfloor with a chalk line, matching each two foot mark from wall to wall. This will give you a 45 degree pattern across the first half of the room; repeat the process across the second half of the room.
Step 3
Start your hardwood install in the corner, cutting the wall ends of each row at a 45 degree angle. Note that the beginning triangle will be too small to install; this piece will be cut to fit and nailed in when you finish the room.
Step 4
Continue with the install as normal, taking care to align the installed rows with the two foot chalk lines.
Step 5
Reverse the angle of the 45 degree end cuts when you reach the midway point of the room; note that you will be able to use some of the scraps from the first half room cuts for starting and ending pieces the same as if you were installing a parallel floor.
Step 6
Finish the ending corner by reversing the starting process, cutting a triangle to nail in each corner when you finish the trim of the floor.