Question about deck rail post hardware.
I’m a pretty new framer, just 2 years in and have a question regarding 4by4 deck railing on a flat deck roof(my property). I was trying to avoid cutting into the roof to put in the posts and instead notching them and bolting them to the side, in through the header joist. What would be the best hardware? do I have to run Through bolts with nuts on the inside or can I use a trulok type screw? I’d rather use through bolts for more support but do I have to flash it or would caulking be sufficient seeing that it’s exposed to weather(rain/snow) Thanks. Seems like a basic question but I’m not a roofer and I haven’t dealt with a deck roof yet.