Pressure treated sill plate

[Ron Bishop]

Does anyone know when sill plates were required to be pressure treated?

[Jerry Peck]

When caveman discovered fire and started using tar pits to protect his wood from getting wet??? :)

I don't know, but it was a very long time ago. :D

[Brandon Whitmore]

R319 still just requires naturally decay resistant wood or pressure treated.

I start seeing pressure treated sill plates by about the mid 60's I believe-- could be wrong.

[Ken Rowe]

At least by the early 70's.