Best way to attach bracket to timber?
This is for a structure that will support solar panels. I know the Building and Safety inspector will want to know that the attachment method is such that it will protect the joist from moisture incursion through the mount point.
What I'm thinking at this point is to drill a pilot hole, squirt silicone caulking in there with a gun and apply some on the bottom of the L bracket. A good amount will ooze out and I should get a good seal. An alternative for the brackets would be to make rubber gaskets out of some thin (about 0.030 in) rubber sheets I have. I could also dip the lag bolts in something like Tung oil or something else before installing them.
Normally these brackets and rails go on a roof. Not sure they do anything special to the holes but they probably do install a rubber sheet along with some flashing to divert rain water.
Any thoughts? Easier is better. I just need to make the inspector happy and protect the structure from early moisture damage.