I knew when we bought our Colonial built in '91 from teh bank on a forclosure we would have some issues. But what looked like a rotted kick plate under a side door turned out to be a non-suported pre-cast stainrs that sunk agains the house and the landing on top was pitched slightly towards the house for years. Rotted out the kiick plate all two inches of seven of the 6X2 studs under teh door and all the particle board sheeting under it to the foundation! Glad I caught it before teh mud room started to sag! Can't get access to teh crawl space under the mud room. So have to break the concrete stairs up witha 20 lb. sledge haul it away replace all the wood and siding under the door! Replace the stairs and riser with a PT one!