This property has had a extensive beetle infestation. The damage that can be caused through woodworm is immense. it can in-fact get to a point where the timber has no structural strength left in it. There are various types of beetle infestation, and this is dependent of the type of wood. The beetles eat up and down the heart of the timber and exit only to breed, so even if there are not many exit hole the damage can be extensive as shown in the picture where the joist is completely hollow. in this instance as it was impractical to remove the timber without causing major disruption, it was treated and a epoxy resin repair induced making the timber stronger than it was originally.