Duro-Last DF50 User Manual
DURO-FLEECE™ 50 MIL MEMBRANE
Advantages:
Duro-Last
an excellent choice for projects requiring a long
lasting, energy efficient roofing membrane. The
combination of fleece and the proven performance of
Duro-Last roofing membrane results in an ideal
product for use in adhered and mechanically attached
applications over a wide variety of roof substrates. The
complete line of Duro-Last custom prefabricated
accessories is compatible with the DF50 membrane.
Description:
In addition to the fleece, DF50 membrane incorporates
a weft insertion knitted scrim within PVC films to
provide exceptional strength and waterproofing.
PVC Film - Proprietary thermoplastic PVC
formulation of resins, plasticizers, stabilizers,
biocides, flame retardants, and U.V. absorbents.
Scrim - An 18 x 9 polyester fabric construction
composed of 840 x 1000 denier threads provides
superior tear and puncture resistance. The polyester
thread is treated to prevent wicking.
Fleece - The 3.8 ounce per square yard needlepunched polypropylene fleece provides excellent
properties for adhering to, or mechanically attaching
over, a variety of substrates. Each roll of membrane
has one selvage edge where the fleece is held back
3 inches to provide for hot-air welding to the
underlying membrane.
Total Membrane Thickness – 50 mil, nominal.
®
Duro-Fleece® 50 mil (DF50) membrane is
PVC film above scrim – 28 mil
Energy Efficiency:
White DF50 membrane is an excellent product for
complying with California Title 24, LEED and other
energy efficiency programs requiring the use of a
highly reflective roof membrane.
Cool Roof Rating Council (CRRC)
Initial 3-yr Initial 3-yr Initial 3-yr
White 0.85 Pending 0.89 Pending 108 Pending
1
Duro-Last’s CRRC Product ID: 0610.
Solar
Reflectance
Thermal
Emittance
LEED & LEED-EB Credits - White DF50 membrane
alone can obtain 1 credit in either U.S. Green
Building Council’s LEED or LEED-EB programs. In
combination with other design criteria the membrane
may help attain many other credits.
LEED Credit Category Duro-Last Attribute
Sustainable Sites Credit 7.2
Heat Island Effect: Roof
LEED-EB Credit Category Duro-Last Attribute
Sustainable Sites Credit 7.2
Heat Island Effect: Roof
1
Solar Reflective
Index (SRI)
Solar Reflective Index
SRI = 108
Solar Reflective Index
SRI = 108
Overall Thickness (with Fleece) – 68 mil.
Weight – 0.33 lb. per sq. ft.
Color – White.
Warranty:
Duro-Fleece warranties are available for projects
utilizing DF50 membrane. Contact Duro-Last for
warranty details. Consequential damage coverage
Available Configurations:
Roll Good – Dimensions
Product
Name
DF50
Dimensions
10 ft. x 100 ft.
5 ft. x 100 ft.
Estimated
Coverage
975 sq. ft.
475 sq. ft.
Roll Weight
335 lb.
165 lb.
is not available for Duro-Fleece installations.
Available Warranties
10 Year Material Only
15 Year
20 Year
NDL High Wind Hail High Wind + Hail
Material Only Residential
NDL High Wind 15 + 5 Material
Material Only Residential
Duro-Last, “World’s Best Roof”, Duro-Fleece and Duro-Guard are registered marks owned by Duro-Last, Inc.
1 of 2 www.duro-last.com 800-248-0280
Updated: 11/21/2013
DURO-FLEECE™ 50 MIL MEMBRANE
Codes and Standards:
Underwriters Laboratories (R10128).
Storage:
Store rolls on pallets. Use tarps to keep rolls dry.
Membrane Attachment:
Adhered – DF50 membrane may be adhered to a variety of properly prepared roof decks, walls, cover boards
and insulations including structural concrete, gypsum, lightweight concrete, DensDeck
SECUROCK
existing built-up roof (BUR) by using Duro-Fleece
®
Gypsum-Fiber Roof Board, and Duro-Guard® ISO products. It may be adhered directly to an
®
Adhesive or splatter applied Duro-Grip® CR-20. Prior written
®
Prime Roof Board,
approval from the Duro-Last Engineering Services Department is required prior to adhering to BUR. Refer to the
Adhered Duro-Fleece Roofing System Specification for substrate preparation and acceptable adhesives.
Mechanically Fastened – DF50 membrane may be mechanically attached to a variety of roof deck and wall
materials. An appropriate slip sheet or cover board may be required. Refer to the Duro-Last Mechanically
Fastened Systems Specification for system requirements.
Physical Properties:
DF50 membrane has been subjected to the tests required by ASTM 4434 “Standard Specification for Poly (Vinyl
Chloride) Sheet Roofing” and has been classified as a Type III, internally reinforced sheet with a fabric backing.
The results of each test as well as typical values are listed below.
Physical Property Test Method ASTM 4434 Requirement Result Typical Value
Overall Thickness ASTM D751
Thickness Over Scrim ASTM D7635
Breaking Strength1 ASTM D751 Grab Method
Elongation1 ASTM D751 Grab Method
Seam Strength ASTM D 751 Grab Method
Tear Strength1 ASTM D751 Procedure B
Low Temp. Bend ASTM D2136
Heat Aging ASTM D3045
Accelerated Weathering
Dimensional Stability1 ASTM D1204
Water Absorption ASTM D570
Static Puncture ASTM D5602
Dynamic Puncture ASTM 5635
1
Typical values are shown for both machine and cross machine directions. The machine direction results are listed first.
ASTM G154
(formerly G53)
Conditioned for 56 days in oven
Irradiance level of 0.68 W/m2-nm.
4 hour condensation at 122 F
Conditioned for 6 hours in oven
Immersed in water at 158 F
Allowable Weight Change: ≤ 3%
0.045 in.
0.016 in.
200 lbf./in.
15%
258 lbf.
(75% of Breaking Strength)
45 lbf
Must Pass at – 40 F
maintained at 176 F
5,000 hour total test time.
Cycle: 8 hour at 145 F,
maintained at 176 F.
Allowable change: ≤ 0.5%
for 168 hours.
33 lbf
14.7 ft-lbf (20 J)
PASS
PASS 28 mil
PASS 500 lbf x 344 lbf 1
PASS 32% x 77%
PASS 278 lbf
PASS 67 lbf x 160 lbf 1
PASS PASS
PASS PASS
PASS PASS
PASS 0.11% x 0.11% 1
PASS 2.7%
PASS
PASS
50 mil, nominal
(with fleece: 68 mil)
1
33 lbf
14.7 ft-lbf
Duro-Last, “World’s Best Roof”, Duro-Fleece and Duro-Guard are registered marks owned by Duro-Last, Inc.
2 of 2 www.duro-last.com 800-248-0280
Updated: 11/21/2013
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