So this is what we did....and why. My front porch - or a favorite spot to sit and watch it snow, or drink a Saturday afternoon coffee, or rock and read, etc. - the porch is about 25 years old. The tongue and grove fir flooring has absorbed moisture to the point that it is making "hills" in some spots and the wood was rotting under the columns. (the columns that I don't think fit the house)
This only hints at the rotting of the wood under the support columns....among other places.