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An example of a particle barrier:
Basaltic Termite Barrier (BTB)
BTB is classified as a particle barrier because it uses rock
particles of a specific size to prevent termite penetration.
The principle behind BTB is simple. The particles of BTB are
small enough that they pack tightly and do not allow termites to
squeeze through. They are also big and heavy enough that the
termites can't pick them up and move them. Finally, the
particles are too hard for the termites to chew.
BTB can be installed prior to pouring a foundation, under and around
foundation retaining walls during construction, or around the perimeter
of existing slabs.
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| Installing BTB |
The drawback with particle barriers is the difficulty of installation
in some situations. Unstable or uncompacted soil, rough or irregular
surface edges, or inadvertent mixing with soil may give rise to problems.
BTB is produced under a license agreement between the University of Hawaii and Ameron HC&D.
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An example of a metal mesh barrier:
TERMI-MESH
TERMI-MESH
is a marine-grade 316 stainless steel mesh which has been available in
Hawaii since 1995.
The mesh has an aperture size which is much too small for
Formosan subterranean termites to squeeze through. The stainless
steel is also too hard for the termites to chew.
TERMI-MESH can be installed under concrete slabs and around
electrical and plumbing conduits. It can also be used to prevent termite
penetration through hollow-tile retaining walls, to seal cold joints and
concrete cracks, and as a "boot" or "sock" to
protect utility poles and wooden fence posts.
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| Preparing to
install TERMI-MESH |
Care must be taken while installing TERMI-MESH to insure seamless
bonding to construction elements to prevent termites from circumventing
the barrier.
TERMI-MESH is a product of TERMI-MESH Australia Pty. Ltd. |
FACT:
Physical termite barriers do not kill termites. Instead, they create a physical
roadblock that is difficult for termites to penetrate directly.
