Hopefully, your storage facility will be not only insect but also rodent
free.  Mice love paraffin blocks, leave nasty teeth marks and unwantable,
Hanta-variety calling cards.  A cool, dry place is ideal, if temperatures
get too high, blocks will actually get stuck together.  Been there and had
both these problems. 
Gayle Callis
MT,HT,HTL(ASCP)
Research Histopathology Supervisor
Veterinary Molecular Biology - Marsh Lab
Montana State University - Bozeman
S. 19th and Lincoln St
Bozeman MT 59717-3610

406 994-6367 (lab with voice mail)
406 994-4303 (FAX)

email: gcallis@montana.edu