Masonite siding is a common exterior building material used as exterior cladding. However, masonite or what is known as “hard board” siding is susceptible to rot and deterioration when exposed to the elements. In this video, we show you how to identify the siding, what are commons signs of failing siding and what should be done about it. The best product to replace the hard board (or Masonite) siding with is James Hardie lap siding. In this case, some of the failing siding has been replaced with Beaded Smooth Lap Siding by James Hardie.