OK thanks. I know for 100% the rot was not there at installation as I was part of the installation crew. I wish I had taken pics right after to show but I guess it does not matter anyway as it is there now.
they make railings now that slide over the PT wood to cover all those blemishes
I did not know that, that is a great idea. I will look into those.
I have scheduled a pest control company for inspection and I hope they are able to tell me I do not have termites. I did see termites swarming out from under the deck several weeks ago so I would not be surprised if that is not the case. But I have never seen any other evidence of termites other than that. And that is what made me think this is termite damage from already infested wood. But it sounds like it is just already rotted wood and if I do have termites it had nothing to do with this wood. And I assume the termite guy can tell me for sure.
OK thanks a lot for you help. I was really worried this wood had been termite infested and now my home would be infected but sounds like that is likely not the case. More like if I do have termites it is not becasue of this wood. Appreciate you taking the time to explain to someone who knows nothing abour wood and building materials
Forgot to ask - will this rot keep deteriorating? If so, is there anything I can do to stop it?