I have read many, many, many of the composite vs capped vs PVC threads and I think I've decided on the Fiberon Horizon. I've posted below a quick sketchup of what I plan to do with the picture frame and field. Outer frame will most likely be rosewood, and inner will be greystone. I realize there will be a lot of reframing around the perimeter to accomplish this. Planning on doubling the rim and the joist at the transition, then hanging headers between the two. Might have to get a little creative on the 45* corners for support of the mitre. Anyone see any major issue with what I am planning?
My other question is regarding the capped composite. From the pics I can find on google,the rosewood has a grayish center. What do you guys do at the mitres? I was planning on using a hidden fastener and spacing the same as the side gaps on the rest of the deck, but not sure if that gray center will be visible. Do you guys butt the mitres tight? Just not sure what to do there, might be a non issue but I do tend to over think things a bit. Any input from the experts would be greatly appreciated!
Pics below for reference.
Joist to beam non-connection
Thanks in advance for any input!