I have a few bad deck joists that I replaced with new PT joists. These repairs are great.
Now I have a few more not too bad joists that will be rotted in a few years. I am thinking to add new PT joists sistering with the old ones. In addition, I will add carriage bolts to strengthen the two sistering joists together. My new joists can rest on a beam at one end, so the carriage bolts will be act like joints hangers.
Is the sistering repair an OK practice? Shall I go the complete repair to take the old joists off?