Tongue & groove pine
The inside of this porch is finished using tongue and groove pine. We framed up the walls with pressure treated lumber than then covered it with the T&G boards. The trim was ripped from pine 1×8. The pine has a lot of character with the heavy grain and knots showing through. It can be left with a natural finish or easily stained. It will be protected with a coat of polyurethane to keep out moisture.