Duro-Last DL40 User Manual

DURO-LAST® 40 MIL MEMBRANE

Advantages:

Duro-Last 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.

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

Assuming 6 inch overlap.

Energy Efficiency:

White DL40 membrane is an excellent product for complying with California Title 24, LEED energy efficiency programs requiring the use of a highly reflective roof membrane. It is an ENERGY STAR

40 mil (DL40) membrane is an excellent

• PVC film above scrim – 17 mils

• PVC film below scrim – 11 mils

Width

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.

qualified product.

Length

(max.)

Roll Area Approx.

Weight

Approx.

Coverage

and other

Cool Roof Rating Council (CRRC)

Initial 3-yr Initial 3-yr Initial 3-yr

White 0.88 0.68 0.87 0.84 111 82

Tan 0.39 P

Gray 0.47 P2 0.89 P2 54 P2

Dark Gray 0.26 P2 0.88 P2 26 P2

Duro-Last’s CRRC Product ID: 0610.

3-year aged results pending.

Solar

Reflectance

Thermal

Emittance

0.89 P2 43 P2

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

LEED-EB Credit Category Duro-Last Attribute

Sustainable Sites Credit 6.2

Heat Island Effect: Roof

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

Solar Reflective

Index (SRI)

Solar Reflective Index (SRI)

SRI = 111

ENERGY STAR Qualified Thermal Emittance = 0.87

Duro-Last, “World’s Best Roof”, Duro-Bond and Duro-Guard are registered marks owned by Duro-Last, Inc.

1 of 2 www.duro-last.com 800-248-0280

Updated: 11/19/2013

DURO-LAST® 40 MIL MEMBRANE

Codes and Standards:

Underwriters Laboratories (US & Canada), FM Approvals, ICC-ES (ESR-1660), State of Florida, Miami-Dade County, Texas Department of Insurance.

Storage:

Store rolls on their sides and on pallets. Use tarps to keep rolls dry.

Membrane Attachment:

Mechanically Fastened – DL40 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.

Duro-Bond

System – The Duro-Bond system (inductive weld) may be used to attach DL40 membrane. Refer

to the Duro-Last Duro-Bond System Specification for system requirements.

Adhered – DL40 membrane may be adhered to a variety of properly prepared roof decks, walls, cover boards and insulations including Duro-Guard™ ISO products, DensDeck

Prime Roof Board and SECUROCK

Gypsum-Fiber Roof Board. Refer to the Duro-Last Adhered Systems Specification for system requirements.

Physical Properties:

DL40 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 IV, internally reinforced sheet. The results of each

test are listed below.

Physical Property Test Method ASTM 4434 Requirement Result Typical Value

Overall Thickness ASTM D751

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 Aging

Dimensional Stability1 ASTM D1204

Water Absorption ASTM D570

Static Puncture ASTM D5602

Dynamic Puncture ASTM 5635

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%

≥ 0.036 in.

≥ 275 lbf./in.

≥ 25%

≥ 330 lbf

(75% of Breaking Strength)

≥ 90 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 40 mil, nominal

PASS 355 lbf x 441 lbf

PASS 28% x 31%

PASS 360 lbf

PASS 125 lbf x 136 lbf

PASS PASS

PASS -0.45% x -0.40%

PASS 2.6%

PASS 56 lbf

PASS

≥ 14.7 ft-lbf (20 J)

Additional Tests

Fungi Resistance ASTM G-21 No Sustained growth or discoloration

Moisture Vapor Transmission ASTM E96, Proc. B, Method A < 0.22 U.S. Perms

Duro-Last, “World’s Best Roof”, Duro-Bond and Duro-Guard are registered marks owned by Duro-Last, Inc.

2 of 2 www.duro-last.com 800-248-0280

Updated: 11/19/2013