Durolast Header

DURO-LAST PHOTO GALLERY & PRODUCT INFORMATION

SEALTITE DURO-LAST PHOTOS

(Click images for larger view)

img01 img02 img03 img04 img05 img06

DURO-LAST PRODUCT INFORMATION

Duro-Last adopted the "World's Best Roof"® logo in 1994 to emphasize their industry leadership. No other roofing system comes near the performance record Duro-Last has enjoyed since 1978. Not all roofing systems, warranties or services are the same. Other products are subject to frequent formula changes in the membrane or components. Some have unproven performance records, while other have major warranty limitations.

Duro-Last is unlike any other single-ply roofing system. More than three decades ago, Duro-Last Founder John R. Burt was determined to produce a roof membrane that would perform consistently year after year. Through diligent research and trial and error, he and his staff created patented processes uniquely enabling contractors to complete their most difficult tasks in-house, under ideal factory conditions. The result is a completely custom prefabricated roofing system that minimizes on-site labour, is a proven performer, and includes warranties that provide unequaled reliability and peace of mind.


Duro-Last is resistant to fire and is approved for factory mutual insurance to the highest standards. With the best life cycle and the no cost stress free warranty..


Extremely durable and installed without disruption to daily operations, the Duro-Last roofing system is also leak-proof, resistant to high winds, and virtually maintenance-free.

DURO-LAST ... MANUFACTURING STANDARDS ABOVE THE REST
AND CUSTOMER SERVICE SECOND TO NONE ...
TRULY THE "WORLD'S BEST ROOF"®

Compare the facts

Company Duro-Last A B C
Membrane Type PVC TPO EPDM Modified Bitumen
Custom Prefabricated Deck Sheets? Yes, eliminates 80-85% of field seams No, all seams are handmade on-site No, all seams are handmade on-site No, all seams are handmade on-site
Sheet Construction Factory prefabricated into panels up to 2,500 sq. ft. Roll goods only; 500 - 1,000 sq. ft. coverage per typical roll Roll goods only; 1,000 sq. ft. coverage per typical roll Roll goods only; 100 sq. ft. coverage per typical roll
Custom Prefabricated Curb & Stack Flashings? Yes Yes No No
Custom Prefabricated Scuppers & Parapets? Yes No No No
All Flashing Material Reinforced? Yes No No No
Flashing Method All heat-welded Adhesive or heat-welded Adhesive Hot mopped, cement or torch-applied
Warranty Coverage Repair and Replacement Repair only Repair only Repair only
Warranty Issued At No Additional Cost?* Yes No No No
Warranty Coverage For Consequential Damages?* Yes No No No
*15-Year Warranty
"Duro-Last", and the "Worlds Best Roof" are registered marks owned by Duro-Last Roofing, Inc.

Tests outlined by ASTM D-4434

Test Description Test Method Metric Results U.S. Standard Results
Thickness Nominal ASTM D 751 1mm. 40 mil - Type IV
(50 and 60 mil
also available)
Breaking Strength ASTM D 751 - Grab Method 1912 x 1636 N 435 x 368 lbf./in.
Elongated at Break ASTM D 751 - Grab Method 30%
Heat Aging ASTM 3045, 56 days @ 176*F Pass
Factory Seam Strength ASTM D 751 - Grab Method 1601 N 360 lbf.
Tearing Strength ASTM D 751 - Procedure B 604 x 556 N 136 x 125 lbf.
Low Temperature Bend ASTM D 2136@-40*F Pass
Accelerated Weathering ASTM G 154 (Formerly G53) No cracking, checking, crazing or erosion
at 5,000 hours of exposure. Pass
Linear Dimensional Change ASTM D 1204 - 6 hrs. @ 176*F -0.4%
Water Absorption ASTM D 570 - 166 hrs. @ 158*F 2.60%
Static Puncture ASTM D 5602 25kg. 56 lb.
Dynamic Puncture ASTM D 5635 20 J 474 pdl-ft.

Additional Tests

Test Description Test Method Metric Results U.S. Standard Results
Fungi Resistance ASTM G-21 No sustained growth or discolouration
Solar Reflectance ASTM C1549 88%
Thermal Emittance ASTM C1371-98 87%
Thermal Emissivity ASTM E408 95%
EMMAQUA Exposure ASTM G90, Desert Sun 339,790 M/J/m² >8.1 million Langleys
Moisture Vapour Transmission ASTM E-96, Proc. B, Method A <0.86 g/hr/m² <.25 U.S. Perms
Weight ASTM D 751 1.1 kg per m² .22 lb. per ft²
Underwriters Laboratories UL-790 Classes A, B & C approved
Factory Mutual Research ASTM E-108; FM 4450 & FM 4470 Rated 1-60, 1-75, 1-90, 1-95m 1-105, 1-135, 1-150,
-165, 1-195, 1-210, 1-270, 1-435, and 1-495

Materials that can be used safely with the Duro-Last Roofing System

The Duro-Last roofing membrane is extremely durable and compatible with dozens of chemicals, construction products, and other materials. Some of the most common are below. For information about materials not listed, contact the Duro-Last Engineering Services Department at 800-248-0280.

- Acid
- Acrylic / Latex Paint
- Bird Droppings
- Bleach
- Brick & Masonry Cleaner

- Cooking Grease
- Detergent Solution
- Diatomaceous Earth
- Ethyl / Methyl Alcohol
- Furnace Residue

- Hydrofluoric Acid Cleaner
- Incinerator Ash
- Linseed Oil
- Nitrogen Sulfate
- Polyethylene

- Polypropylene
- Sea Water
- Soldering Acid / Flux
- Tannic Acid
- Triethylene Glycol

Always consider the five E's of high performance roofing

Cool Zone
Energy, Environment, Endurance, Economics, and Engineering.
Energy Star

Roofing Selection Check List

To make a smart choice for your next roof, consider the Five E's of high performance roofing: Energy, Environment, Endurance, Economics, and Engineering. The Roofing Selection Check List includes the key questions to ask in each area and will help you choose a roofing system that meets your performance requirements.

#1 ENERGY:

  • Does the roof meet EPA ENERGY STAR® criteria?
  • Have potential energy savings of the roofing system been determined, using the EPA ENERGY STAR online calculator?
  • Does the roof meet the ASHRAE 90.1 standard, making it eligible for Federal tax incentives?
  • In California, does the roof meet the requirements of Title 24?
  • Does the roof qualify for local energy credits or tax breaks?

#2 ENVIRONMENT:

  • Is the roof ENERGY STAR-labeled by the EPA ENERGY STAR Roof Products Program?
  • Does the roof contribute toward green building certifications?
  • Is a system/material Life-Cycle Analysis available?
  • Is the roofing material recyclable?
  • Is pre-consumer production scrap generated during manufacturing, recycled?
  • Does the roofing manufacturer have a post-consumer recycling program?
  • Does the roofing system help to moderate interior temperatures in summer and winter?
  • Does the roofing system help deliver good indoor air quality (IAQ)?
  • ADDITIONAL CONSIDERATIONS:
  • How many runs to the local landfill will be needed?
  • What are the anticipated costs for disposal?

#3 ENDURANCE:

  • Does the roofing manufacturer have a good reputation?
  • How many years have they been in business?
  • Does the manufacturer inspect the roof after installation?
  • Does the manufacturer have local references for this type of roofing system?
  • Does the roofing contractor have a good reputation?
  • How many years have they been in business?
  • Are contractor's employees fully-trained and supervised at the job site?
  • Does the manufacturer train and monitor contractors and grade each installation?
  • Does the warranty cover the entire roofing system, including installation defects?
  • Does the warranty include coverage for ponding water or consequential damages?
  • Is there a full warranty when installed over an existing roof?
  • ADDITIONAL CONSIDERATIONS:
  • If this roof type has failed in the past, what have been the primary reasons for system failure?
  • How were failures resolved?
  • How often are routine maintenance and simple repairs required?

#4 ECONOMICS:

  • Can the manufacturer or contractor provide a Life-Cycle Cost that indicates the true long-term cost of the roofing system?
  • Is this a custom, prefabricated roofing system with cost, performance, and environmental advantages?
  • ADDITIONAL CONSIDERATIONS:
  • What are the estimated maintenance and repair costs per year?
  • Is a roof tear-off required before installation?
  • Does the roofing system require tear-off and disposal at the end of its service life?

#5. ENGINEERING:

  • Is this the best roofing system for my roof deck?
  • Is this the best roofing system for my building?
  • Is this the best roofing system for this climate?
  • Has drainage been adequately designed to ensure water run-off?
  • Does the roof meet all local roofing code specs?
  • Is the roofing material fire resistant?
  • Can the manufacturer provide a wind calculation for me?
  • Does the roof membrane have the highest density reinforcement scrim for superior strength performance?