Flex TPO Self Adhered Reinforced Membrane - Manual (Page 4)

4
Resistance to water absorption
After 7 days immersion 158 °F (70 °C)
Change in mass, % ASTM D471
(top surface
only) 4.0 max.
2.0 typical
Resistance to microbial surface growth, rating (1 is very
poor, 10 is no growth) ASTM D3274
2 yr S. Florida 9-10 typical
Field seam strength, lbf/in. (kN/m)
Seam tested in peel ASTM D1876 25 (4.4) min.
60 (10.5) typical
Water vapor permeance, Perms ASTM E96 0.10 max.
0.05 typical
Puncture resistance, lbf (kN)
(see supplemental section for additional
puncture data) FTM 101C
Method 2031 250 (1.1) min. 45-mil
325 (1.4) typical 45-mil
300 (1.3) min. 60-mil
350 (1.6) typical 60-mil
Resistance to xenon-arc weathering 2
Xenon-Arc, 17,640 kJ/m
²
total radiant
exposure, visual condition at 10X
ASTM G155
0.70 W/m²
80 °C B.P.T.
No cracks
No loss of breaking
or tearing strength
1 Aging conditions are 28 days at 240 °F (116 °C) equivalent to 400 days at 176 °F (80 °C) for breaking strength,
elongation, tearing strength, ozone and puncture resistance
2 Approximately equivalent to 14,000 hours exposure at 0.35 W/m² irradiance B.P.T. is black panel temperature 6/07
SUPPLEMENTAL APPROVALS, STATEMENTS AND CHARACTERISTICS:
1. Flex TPO meets or exceeds the requirements of ASTM D6878 1 Standard Specification for
Thermoplastic Polyolefin Based Sheet Roofing.
2. Radiative Properties for E NERGY S TAR ®, Cool Roof Rating Council (CRRC) and LEED™
TEST METHOD WHITE
TPO
E NERGY S TAR initial solar reflectance Solar Spectrum Reflectometer 0.87
E NERGY S TAR solar reflectance after 3 years Solar Spectrum Reflectometer (after cleaning) 0.83
CRRC initial solar reflectance ASTM C1549 0.79
CRRC solar reflectance after 3 years ASTM C1549 (uncleaned) 0.70
CRRC initial thermal emittance ASTM C1371 0.90
CRRC thermal emittance after 3 years ASTM C1371 (uncleaned) 0.86
LEED thermal emittance ASTM E408 0.95
SRI (Solar Reflectance Index) ASTM E1980 110
An E
NERGY S TAR compliant low slope roof product must have an initial solar reflectance of at least
0.65 and a 3 year aged solar reflectance of at least 0.50. Cleaning of the aged roof surface is permitted
by the ENERGY STAR test protocol.
The Cool Roof Rating Council (CRRC) does not specify minimums for reflectance or emittance but
they do require specific protocols for testing and reporting. Cleaning of the aged roof surface is not
permitted for determination of radiative properties after 3 years.
A LEED “point” may be earned if a roof material is E
NERGY S TAR qualified and has a thermal
emittance of at least 0.90 as determined by ASTM E408.
California Title 24 requires an initial minimum reflectance of 0.70 and emittance of 0.75 as determined
by CRRC test protocol.