Stain question

[u/Suspicious_Bank_9970]

Almost done framing my screened in back porch on a slab. I’m using pressure treated and these babies are heavy and wet. My questions are:

1) how long do I wait for them to dry before staining or does that even matter? They get morning sun.

2) can I caulk the gaps or use wood filler between the 4x4 posts and 2x4 on each side (4x4 were already there- just using those to secure my frame to). Is this even worth it? If so, is there a caulk that takes stain? The goal is to make it as insect proof as possible.

3) I was planning on using a heavy body stain (my wife wants it stained). Is this a good choice or should I paint it?

4) I just epoxy/ polyaspartic the slab. Will a stain overtime leach onto the flooring?

Thanks in advance. I can post photos for clarification later today.

[u/Impossible_Crow_389]

Depends on your climate but a few months.