Custom Fabricated
Great Lakes Roofing and Insulation Systems specialize in the installation and care of the Duro-Last Roofing System. For over 40 years Duro-Last has led the industry in PVC membrane roofing and GLR & IS has been a part of that success for more than 35 years.
Did you notice we are a Platinum Contractor? We are proud to be a Duro-Last Platinum Contractor but what does that mean exactly? With each commercial roof installation, Duro-Last sends a Quality Assurance Technician to inspect the completed project. The QA then grades the installation. This last year, we installed more than 500,000 square feet of roofing and earned higher than a 95% average grade.
As our customer, you benefit from the family-type relationship we have developed with the manufacturer. We work together to bring you a superior product with the best installation to deliver the best roof!
The Facts About Single-Ply PVC Roofing
The Differences Between Single-Ply PVC Roofing & Flat Roofing
How does Single-Ply PVC roofing by Duro-Last hold up against other types of flat roofing systems? Check out the comparisons below and contact us with any questions or for a free estimate on your next flat roof.
| Duro-Last | Manufacturer A | Manufacturer B | Manufacturer C | |
|---|---|---|---|---|
| Membrane Type | PVC | TPO | EPDM | Modified Bitumen |
| Custom Prefabricated Deck Sheets? | Yes | No | No | No |
| Sheet Construction | Factory prefabricated into panels up to 2,500 sq. ft | Roll goods only 500 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 |
| All Flashing Material Reinforced | Yes | No | No | No |
| Flashing Method | All Heat-Welded | Glue & Heat-Welded | Glue | Hot mopped |
| Coverage for Ponding Water? | Yes | No: Typically Voids Warranty | No: Typically Voids Warranty | No: Typically Voids Warranty |
| Coverage for Consequential Damages? | Yes | No | No | No |
The Warranty
Best-in-Class Warranties. Once the project has been completed and the roofing crew goes home, what remains is your roof system and your warranty. Duro-Last leads the roofing industry with comprehensive warranty coverage. Not only does GLR & IS stand behind every square foot, so does Duro-Last. Reach out to us for a sample copy of the warranty.
Great Lakes Roofing and Insulation Systems
7151 S. M-129
Sault Ste. Marie, MI 49783
Office: (989) 575-0190 or
Office: (906) 647-2916
Fax: (989) 575-0150
Email: info@greatlakesroofing.com
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