Duro-Last DL40 Membrane - Manual

Duro-Last, “World’s Best Roof”, Duro-Bond and Duro-Guard are registered marks owned by Duro-Last, Inc.
Updated: 11/19/2013
DURO-LAST
®
40 MIL MEMBRANE
1 of 2 www.duro-last.com 800-248-0280
Advantages:
Duro-Last ® 40 mil (DL40) membrane is an excellent
choice for projects requiring a long lasting, energy
efficient roofing membrane. The membrane is
available in prefabricated sections or as roll goods.
The complete line of Duro-Last custom prefabricated
accessories is compatible with the DL40 membrane.
Description:
DL40 membrane is composed of PVC film laminated
to both sides of a reinforcement fabric (scrim).
PVC Film - Proprietary thermoplastic PVC
formulation of resins, plasticizers, stabilizers,
biocides, flame retardants, and U.V. absorbents. The
same PVC film is used on both sides of the scrim.
• PVC film above scrim – 17 mils
• PVC film below scrim – 11 mils
Scrim - An 18 x 14 polyester fabric construction
composed of 840 x 1000 denier threads provides
superior tear and puncture resistance. The polyester
thread is treated to prevent wicking.
Total Thickness – 40 mil, nominal.
Weight – 0.22 lb. per sq. ft.
Color – White, tan, gray and dark gray.
Available Configurations:
Prefabricated Sections - DL40 is available in
prefabricated sections up to 2,500 sq. ft. with a
maximum 100 ft. in either dimension.
Roll Good – Typical Dimensions
Width
Length
(max.)
Roll Area Approx.
Weight
Approx.
Coverage 1
64 inches 150 ft. 795 sq. ft 176 lb. 725 sq. ft.
48 inches 150 ft. 600 sq. ft 132 lb. 525 sq. ft.
32 inches 150 ft. 400 sq. ft 88 lb. 325 sq. ft.
16 inches 150 ft. 200 sq. ft 44 lb. 125 sq. ft.
1 Assuming 6 inch overlap.
Energy Efficiency:
White DL40 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. It is an ENERGY
STAR
® qualified product.
Cool Roof Rating Council (CRRC) 1
Solar
Reflectance
Thermal
Emittance
Solar Reflective
Index (SRI)
Initial 3-yr Initial 3-yr Initial 3-yr
White 0.88 0.68 0.87 0.84 111 82
Tan 0.39 P 2 0.89 P 2 43 P 2
Gray 0.47 P 2 0.89 P 2 54 P 2
Dark Gray 0.26 P 2 0.88 P 2 26 P 2
1 Duro-Last’s CRRC Product ID: 0610.
2 3-year aged results pending.
LEED & LEED-EB Credits - White DL40 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 other credits.
LEED Credit Category Duro-Last Attribute
Sustainable Sites Credit 7.2
Heat Island Effect: Roof
Solar Reflective Index (SRI)
SRI = 111
LEED-EB Credit Category Duro-Last Attribute
Sustainable Sites Credit 6.2
Heat Island Effect: Roof
ENERGY STAR Qualified
Thermal Emittance = 0.87
Warranty:
The following warranties are available for projects
utilizing DL40 membrane. Contact Duro-Last for
warranty details.
Available Warranties
10 Year Material Only
15 Year
NDL High Wind
Material Only Residential