Q: When inspecting the porch floor joists of an 1880s farmhouse in Illinois, I was surprised to see that the joists and the underside of the tongue-and-groove fir decking appeared velvety, and looked like they were covered with matted dog hair. The surfac
Q: While renovating a home in New Jersey, I found a fungus-like growth a few inches long growing between the tile floor and the base molding in the bathroom. The house is on a concrete slab. Is there anywhere I can have this growth tested to see if it is poria?