There need to be more specific protocols for meeting the requirements in this credit, in particular: e-ii) how much sand / diatomaceous earth? Where? How deep? How fine must the sand/DE be?e-iii) how fine must the mesh be? Where must it be installed?e-iv) what kind of non-toxic termite bait systems are acceptable? How large must the system be?
e-ii) The sand/diatomaceous earth (DE) should be in a 20-inch band on the soil surface or in trenches next to foundation walls. The layer should be 4 inches thick at the foundation, and feather out to meet grade at the outer edge of the 20-inch band. For trench installations, trenches should be 4? deep and 6? wide. The sand should be approximately 16-grit. For sand barriers in conjunction with slab foundations, the sand or cinder must be applied before the foundation is poured.e-iii) Stainless steel mesh barriers should have mesh openings of approximately 0.66 mm x 0.45 mm maximum. It is wrapped around foundations, pipes, and posts to prevent termite intrusion. Include a submittal(s) to show the mesh size used.e-iv) Acceptable non toxic and least toxic termite bait systems include: nematodes (microscopic worms), boric acid bait blocks or stations (placed around the structure; attract the pests to consume termiticides without broad application of chemicals), thermal, freezing, or electrical eradication techniques, and desiccating dusts. Install the stations/systems completely around the structure, and target known or suspected sites of termite activity (e.g., near tree stumps).
Updated 10/1/13 for rating system applicability.