Roofing and pest control

On my way to becoming a book conservator, I encountered a drugstore
beetle. To make a long story short, I now supervise an insect
monitoring program for our buildings. The HRHRC has seven floors, we
often find the most bugs on the top floor. Every August and September
the chirping of crickets sounds in the stacks. I suspect that
crickets (and in the past year three bats) are entering through an
expansion joint along the edges of the flat concrete, tar, and gravel
roof. "Soon" (administrative-speak for some time in the next year or
two or three) we will be replacing this roof. I'm looking for advice
from anyone who has experienced problems with their flat roofs. Has
anyone blocked bug access to a building through the expansion joint
with foam insulation? Other material? Thanks for your help,

Mary Baughman
Harry Ransom Humanities Research Center
University of Texas, Austin

                                  ***
                  Conservation DistList Instance 9:13
                 Distributed: Wednesday, July 26, 1995
                        Message Id: cdl-9-13-004
                                  ***