I have attached deck guardrail posts in a way shown on page 3 of Simpson Strong Tie's T-C-GRDRLPST22 bulletin.
There are couple of places where water could be trapped:
- Between double blocking or blocking and joists (along the length of blocking).
- Between guardrail post, rim joist, and blocking butts. Highlighted below.
For (1) I plan to use wide enough butyl joist tape to prevent water from getting in-between the boards.
I am not sure how to protect against (2). Is there a recommended approach to this?