But it does mean a thorough investigation should be made to find the root causes. Still others may require major foundation surgery. Termites and Rot 1. Unsound wood can be caused by either termites or rot. Rot can be arrested by shutting off the source of moisture.
Termites call for chemical warfare.
If at all unsure about the cause of bad wood, call in the experts. The Attic 1. Most houses before 1940 had no built-in insulation. However, some old houses will have had insulation added. Houses with brick or stone walls rarely have any wall insulation.