Untitled - National Roofing Contractors Association

FOREWORD
The Handbook of Accepted Roofing Knowledge is
designed to provide designers, specifiers, owners, consultants
and roofing contractors with information on the
design and installation of quality roof systems.
These practices represent a consensus of opinion of roofing
contractors throughout the country. Application techniques
may vary according to climatic conditions. and
each geographical area may employ "area practices"
that are sound and time-proven. We do not mean to imply
by any exclusion that proven area practices are
unsatisfactory.
Roofing technology is currently experiencing revolutionary
changes. Recent problems have stimulated technical
research and investigations that are expanding our
knowledge of roof systems. In the interest of brevity, some
minor technical points have been excluded from this text.
If questions arise, designers are encouraged to contact
the National Roofing Contractors Association (NRCA)
members in their geographical area for specific advice.
The Built-Up Roofing Committee of the Asphalt Roofing
Manufacturers Association congratulates NRCA for the
preparation and publication of this Handbook of kcepted
Roofing Knowledge, an important contribution to the
built-up roofing industry.