11 January 2007
the Roof Repair Manual for Low-Slope Membrane Roof Systems for generic
components that make up these systems.
Identification of Leak Related Repair Work
The initial phase of repairing defects in roof components and systems related to
moisture infiltration is accurately identifying and locating the defect that is the
source of the moisture infiltration. This step can be relatively simple or complex
depending on the circumstances. Interior moisture infiltration that is observed
and reported as a roof leak can be a result of defects or inadequate systems at
adjacent elements of the structure, such as walls, windows, and rooftop
mechanical units. Maintenance personnel shall perform an investigation to
identify and locate leak damage related roof defects prior to performing repairs.
This investigation shall include the following steps:
Location of Leak
Locate the interior leak damage by measuring from a reference point that can be
easily identified on the roof. Typical penetrations such as vent pipes, drains and
curbs are useful in the field of the roof. Exterior or rising wall elements and
expansion joints can be used at perimeters. If roof defects are readily apparent
at the correlated location on the roof, proceed with roof repair work.
Other Potential Leak Sources
If roof defects are not readily apparent and adjacent building elements are
located close enough to be potential sources of the moisture infiltration, continue
to investigate to determine the source of the leak causing the damage.
Moisture Damaged Roof Components
Maintenance personnel shall investigate areas of defects in roof membranes and
flashings related to reported interior moisture infiltration to ensure that insulation
components and other substrates that have been wetted as a result of leaks are
replaced if necessary. In addition, should leak investigations conducted
according to paragraph 1-5.7 result in the determination that the source of the
moisture infiltration is an adjacent element and not the roof system, further
investigation shall be performed to determine if the moisture has infiltrated and
damaged the roofing substrates and components.
Any person involved in roofing maintenance or repair work and exposed to fall
hazards at heights shall be protected from falling to a lower level by the use of an
approved fall protection system. Fall protection systems shall be installed and
utilized in accordance with the US Army Corps of Engineers Safety and Health
Requirements Manual (EM385-1-1) and OSHA standards as applicable. Prior to
accessing the work location, it shall be determined that the roof has the strength