I rough cut the decking at the edges at about 3/8 " larger than the finished cut, I wanted to allow the material to acclamate and shink a little before I made the final cut. I'll let this sit for a week or so and then make the final cut and install the outside band of decking. With all the decking options I chose to go with stk( solid,tight,knot) 5/4 x 6 cedar. With the composites costing nearly tripple and the fact that I just don't like how the composites look after the age, I opted for real wood. The deck I removed was about 18 yrs old and the decking stk cedar was still solid.