In June 2001, the Roof Tile Institute (RTI) and Western States
Roofing Contractors Association (WSRCA) released an industry-based
installation manual that provides recommendations for installing
concrete and clay roof tiles in moderate climate regions of North
Before the manual's release, there were more than 50 manuals
written by various tile manufacturers throughout North America.
Almost all North American tile manufacturers now have formally
replaced their manuals with the new manual.
As RTI commenced a series of training workshops in fall 2001 in
the West, it became apparent the new manual was not only highly
informative but also well-received in the design community. But
some resistance emerged as traditional roofing practices that were
not included in the existing tile installation guides or new
industry manual were being touted as the preference of roofing
contractors. In one session, I was confronted with the statement,
"We will not comply with these changes until we see it in writing
from the code authorities." In this case, the person was referring
to the Uniform...
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