I am having to replace my 2 x 6 decking due to some rot issues (bad pressure treating) I think. The current deck boards abutt my raised concrete screen room on one side and are flush with the brick edging that surrounds the concrete. Since I am at it I want to add on to the deck for a bigger footprint which will extend on the other open side of the screen room. Here is the kicker: I don't want to go back with 2 x 6 decking, I want to use 5/4 x 6.
The NEW framing on the addition will be raised 1/2" to compensate for the thickness difference. How should I go about getting the extra 1/2" needed on the OLD deck framing to bring the new boards flush ?