Here's a couple of shots of my current project. Normally, I run 1x3 metal (1" up behind siding, 3" out over joist/ledger connection) but HO wanted to be able to remove the deck board closest to house to sluice out tree debris (HEAVY pine tree canopy surrounding the house) so I used 1 1/2" x 1 1/2" metal.I didn't really like it, but it works well. I wish they had a more positive connection seal on the ends. How do you do it Mac?
After everything, I put the trim underneath the ledger and in between the channels (which was a lot of work, but it looks very finished.)
The whole deck is spaced 3/8 according to Trex it must be because it is considered a sleeper system. They said they would not have warrantied the deck if I would have done it at a 1/4. Something I never knew before.