porch roof collum repair...
hankjmatt-I'm sure you would agree that a picture would be very helpful in this matter, but without one- -I'm a little confused as to bracing "under the railings, both on the upper landing and under the stair railings"? Is this a two story home with stairs leading to an upper floor? Even if it is, Yes you can brace the entrance roof so that you can repair the column(s) as necessary. BUT, I would not use just one 2 x 4 board to do so. Maybe two 2 x 4's nailed together and wedged in, one on each side of the existing column, even if it is a corner column. I have removed the complete columns for repair by proper bracing of the roof while the column is out. As far as using PT wood for the repair, that is up to you, I don't because PT wood around here shrinks a lot after a short time in this heat. Using a select grade of wood, good installation, along with proper priming and painting, and this repair will be hardly noticeable, and last a very long time. Please post a picture if you can and you will receive better advice I'm sure. Good Luck, David