I bought a house in central Indiana that was built in 1910. I have a tounge and groove porch that is enclosed with walls and screening. The porch is about 15' by 8' and around 7 or 8 foot tall. There are 2 columns at the front and the walls are attached to them. The columns have a round area that sits on a base that looks like it was cut in triangular pieces and slid into place. The base and round area on the outside is all rotted. The board next to it is rotted as well but only around the base. The rest of the board is strong.? Can someone help me through this? I am a noobie when it comes to construction.