||Level Advice for Low-Slope Roofing
When test methods in ASTM D 6630, Standard Guide for Low Slope Insulated Roof Membrane Assembly,
are applied before installation, potential problems of low-slope
roof assemblies can surface. What minimum service-life can be
expected from the waterproofing material, underlying substrate,
and other parts of the assembly? How do these components work
as a system?
New in February, D 6630 offers tests methods that can establish
minimum performance requirements for low-slope assemblies on roofs
either with or without insulation. Key material attributes include
static and dynamic indentation resistance, cyclical fatigue, heat
conditioning, water exposure, tear resistance, and response to
artificial weathering tests, said Rene M. Dupuis, Ph.D., P. E.,
chairman of the task force that developed D 6630.
Pertinent design and installation information for users was compiled
by a 25-member ASTM task force that operated in Subcommittee D08.20
on Roofing Membrane Systems under Committee D08 on Roofing, Waterproofing, and Bituminous Materials. The group
included roofing manufacturers, contractors, designers, architects,
engineers, consultants, and government agencies. Voting members
of the Asphalt Roofing Manufacturers Association, Single Ply Roofing
Institute, National Roofing Contractors Association, Midwest Roofing
Contractors Association, and other low-slope roofing stakeholders
reviewed the guide as it was being developed.
Dupuis, a principal with Structural Research, Inc., Middleton,
Wis., said the greatest benefits of using D 6630 are:
A uniform methodology is used for single ply, built-up, modified
bitumen and spray polyurethane foam roofing systems regarding
design concerns and material performance as a finished roof system.
It incorporates existing ASTM material standards and test methods.
It allows for new roofing materials to be incorporated with
performance tests that are designed to evaluate their durability
as a roof membrane to the extent possible. The design of the roofing
assembly including thermal insulation is presented in a unified
manner along with the material attributes.
For further technical information, contact Rene M. Dupuis, Ph.D., P.E., Structural Research, Inc., Middleton, Wis. (phone:
608/831.5333). Committee D08 meets June 24-27 in Norfolk, Va.
For meeting or membership details, contact Staff Manager Pat Picariello, ASTM (phone: 610/832-9720). //
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