"loosecanon" wrote in message
...
Hi Pat,

There is a product called graniteguard used to deter termites. Apparently
termites hate granite and will avoid it at all costs.


Cheers

Richard


Hi, the reason the granite fines works is because it is graded (screened or
sieved) to a specific size such that the interstitial space is too small for
the termites to fit through, and the product is hard and they therefore
cannot chew through it. Typically, smaller particles of crushed rock
(dependant to a large extent upon the type of crushing equipment used) tend
to be flacky and sharp edged. Basalt, andersite or any other hard rock will
achieve the same result if of the correct size. You are creating a barrier
similar the the stainless mesh mentioned.