FIRST of All, You NEED to look at the Floor. USALLLY in An Old House Always Walks The Floor. In Those Places Whey Walk the Boards, They Need to Be Carefully Removed. You Also Need to Check the Other Places of the Floor To Make Sure That robes are not rantent and are not eaten by beetles. In Order to Determine that Rotten Board Needs to Be Pressed with a Chisel in the Place Were is a Rotten Board Becomes Loose. The Boars Rot Well if the ImproperoproProProProProProProProProProPROWEEN BRICK PILLARS and LAGS.