Hi we are re-storing a 250 year old cabin.It is in need of some beam re-building ,or replacing.We have already done major foundation strengthening and restoration.So we have a good foundation,now we need to re-build the rotting beams ,mostly on the outside.It is a building that is in Pennsylvania,and will be for showing only,I heard of some product that you can re-build beams with,is that true? or must we re-place?