We have Massey do our termite protection at both houses and when we had our last inspection I asked about ground coverings and he said mulch was not worse than rock as long as you don't let it decay and start breaking down. At that point it becomes candy for the termites. I brought up that I always thought it breaking down was a good thing as it contributed to the soil especially down here where it is so handy. He said rake the decomposing mulch a few feet from the foundation and only keep fresher mulch there and you're good. He said rocks can create shade and dampness just like mulch can which is what allows termites to camp out. I was surprised thinking rock would always be better.
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