Task Group to Develop Voluntary Standards For Window Performance
Under Hurricane Conditions
To ensure more reliable door and window performance in the most
extreme wind driven rain conditions, testing is being evaluated
by the American Architectural Manufacturers Association (AAMA),
to assist in the development of a voluntary standard specification
that includes a permissible level of water penetration during these
extreme events. Last fall, the AAMA Southeast Region formed a Hurricane
Water Penetration Standard Development Task Group, with the specific
objective of addressing the water control issue, according to AAMA's
certification manager, Dean Lewis.
"In the mid-1990s, AAMA was instrumental in developing hurricane
performance standards for impact-resistant windows which were incorporated
into building codes for Florida and other coastal regions,"
states Lewis. "The first priority of those codes was to upgrade
structures in order to prevent damage from excessive winds and windborne
debris. The ability of newer structures, which utilize impact-resistant
windows and glass doors, to better withstand hurricanes has been
clearly demonstrated over the last two years," said Lewis.
According to Lewis, AAMA is again taking a leadership role in standard-setting,
recognizing that a limited amount of water infiltration through
a window or door must be anticipated in hurricane conditions. Cycling
test data is being gathered to measure indoor/outdoor pressure differentials
due to hurricane wind-gusting and turbulent wind flow.
"At this preliminary stage, the permissible quantity of water
that actually passes the inner plane of the product is targeted
to be no more than two ounces after 300 pulsating wind cycles. This
translates to approximately two ounces of water every ten minutes
during a 100 mph hurricane," explains Lewis. "Although
it is possible to design a window or door that is leakproof under
the most severe conditions, AAMA's goal is to balance performance
requirements with realistic design considerations -- and manufacturing
costs," concludes Lewis.
For more information about the voluntary performance standard or
to become involved, contact Dean Lewis at firstname.lastname@example.org.