BUILDING ENVELOPE CONSULTING
SERVICES
CONSTRUCTION COMPLIANCE TESTING
STORM RELATED ROOF DAMAGE ASSESSMENTS
FORENSIC INVESTIGATIONS
LITIGATION SUPPORT
FM GLOBAL 1 – 52 FIELD UPLIFT TESTS
ASTM E 907 FIELD TESTING UPLIFT RESISTANCE
OF ADHERED MEMBRANE ROOFING SYSTEMS
ASTM E 1105 STANDARD TEST METHOD FOR
FIELD DETERMINATION OF WATER PENETRATION
OF INSTALLED EXTERIOR WINDOWS,
SKYLIGHTS, DOORS, AND CURTAIN WALLS
NEGATIVE PRESSURE TESTING
SIMULATING WIND UPLIFT
PRESSURE TO VERIFY
RESISTANCE OF LOW-SLOPE
MEMBRANE ROOFS
FM GLOBAL
1-52
ASTM E 907
WIND
WIND ACTS A FLUID
FLOWING OVER AND
AROUND
STANTIONARY
OBJECTS
WIND
~ 25 psf
WIND
CAUSES
AND
CAN
CAUSEAA
POSITIVE PRESSURE
NEGATIVE
(UPWARD)
ON
THE WINDWARD
PRESSURE
ON THE
SIDE OFROOF
THE OBJECT
25 psf
WIND
AFTER THE STORM
BUR - DELAMINATION
Poor Adhesion Between
Insulation and Cover Board
Poor Adhesion Between Cover
Board and Membrane
Poor Adhesion Between Deck
and Insulation
BUR - DELAMINATION
Poor Adhesion Between Cover
Board and Membrane
TPO - DELAMINATION
Poor Adhesion Between
Insulation and Membrane
TPO - DELAMINATION
BUR - FASTENER FAILURE
BEFORE THE STORM…
NEGATIVE PRESSURE TESTING
CONSTRUCTION COMPLIANCE AND RISK
ASSESSMENT
NEGATIVE PRESSURE TESTING
NEGATIVE PRESSURE TESTING
5’ SQ Chamber Imposes
an Uplift Force on the
Membrane
Pressure is
Incrementally Increased
to the Design Test
Pressure
Deflection of the
Membrane is Measured
and Compared to
Performance Criteria
NEGATIVE PRESSURE TESTING
Fastener holding adequately at
test pressure
NEGATIVE PRESSURE TEST

Application
Acceptance of new (including re-roofed and re-covered)
above-deck roofing assemblies by FM Global…in
regions that are both prone to hurricanes, typhoons or
tropical cyclones and where design wind speeds are at
least 100 mph (FM 1-52).
 Field verification of adhesion of low-slope roof for the
issuance of a certificate of insurability. For example
WPI-8 for the Texas Department of Insurance (TDI).

NEGATIVE PRESSURE TEST

Application
 Risk
Assessment – as part of the evaluation of a
property this test could be used to determine
probable loss at incremental pressure (Hurricane
Strengths).
CURTAIN WALL TESTING
NEW CONSTRUCTION
FORENSIC INVESTIGATIONS
RISK ASSESSMENT
DUE DILIGENCE
CURTAIN WALL TESTING
Rack Calibrated to
Deliver 5 gal / sf / hr
CURTAIN WALL TESTING
CURTAIN WALL TESTING
Pressure Differential
Imposed Across System
CURTAIN WALL TESTING
CURTAIN WALL TESTING
CURTAIN WALL TESTING
CURTAIN WALL TESTING
CURTAIN WALL TESTING
Water Infiltration
FORENSIC – COMPONENT ISOLATION
The Forensic Version of
the Test Allows For
Isolation of Various
Components to
Determine Mode of
Failure.
FORENSIC – COMPONENT ISOLATION
FORENSIC – COMPONENT ISOLATION
IR Images During Test Help
Indentify Path of Water Intrusion
FORENSIC – COMPONENT ISOLATION
IR Images During Test Help
Indentify Path of Water Intrusion
DESTRUCTIVE OBSERVATIONS…SOMETIMES YOU
JUST NEED TO OPEN THE WALL AND SEE WHAT
IS HAPPENING
FORENSIC INVESTIGATIONS
LITIGATION SUPPORT
WATER INFILTRATION INVESTIGATIONS
WATER INFILTRATION INVESTIGATIONS
WATER INFILTRATION INVESTIGATIONS
WATER INFILTRATION INVESTIGATIONS
WATER INFILTRATION INVESTIGATIONS
Remove Finish Materials
WATER INFILTRATION INVESTIGATIONS
Document MC of
Framing
WATER INFILTRATION INVESTIGATIONS
Run Component Isolating Water
Test to Determine Mode of
Failure
BUILDING ENVELOPE SURVEY
NEW CONSTRUCTION
LITIGATION SUPPORT
FORENSIC INVESTIGATIONS
RISK ASSESSMENT
DUE DILIGENCE
BUILDING ENVELOPE SURVEYS
BUILDING ENVELOPE SURVEYS
BUILDING ENVELOPE SURVEYS
BUILDING ENVELOPE SURVEYS
BUILDING ENVELOPE SURVEYS