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Duro-Last Roofing System

A Sentry Installed Duro-Last Roofing Systemduro-last-roofing-logo The Ultimate Combination For Your Facility Since 1978, Duro-Last has been the industry leader in producing custom-prefabricated single-ply roofing systems built to fit your building, reducing material waste and on site labor costs. The prefabricated roof system is manufactured under ideal factory controlled conditions eliminating up to 85% of the field fabricated seams required by all other roofing systems. This process helps speed installation and eliminates leaks due to field crews working under changing outdoor weather conditions. Sentry Roofing has 27 years’ experience installing tens of millions of square feet of the Duro-Last membrane across the nation. With our status as an award winning Elite Master Contractor and the unmatched performance history of the Duro-Last roofing system you can be assured of receiving the very best in product and installation.

Read a Letter of Commendation from Duro-Last’s Executive Leadership

Custom Prefabrication Eliminates Leaks & Saves on-Site Labor Dollars!


Studies of roof failures show that most problems occur because of installation errors, particularly with the on-site field seams on deck sheets and flashing details – stacks,curbs, drains, walls, corners, scuppers, and rooftop penetration. We will measure every detail on your roof and Duro-Last will build a custom made prefabricated roof to fit the size and details of your unique rooftop. In-factory prefabrication provides unsurpassed quality control on the most difficult flashing details and eliminates up to 85% of the on-site field seams typical with other roof systems. This precise attention to detail reduces on site labor and delivers long-term, leak-proof performance.

With Sentry’s experience and the Duro-Last Roofing System the most difficult details become simple.

Backed By The Industry’s Best Warranty

Duro-Last provides you peace of mind for your commercial building with the industry’s only large print, comprehensive warranty including coverage for consequential damages to your building and its contents. It also provides 100% labor and material coverage with no exclusions for ponding water and no dollar limit to repair or replace during the warranty term. High wind and hail warranties are available as well. A sample warranty will be provided in your proposal packet to fully explain all warranty details.

Proven Protection for Your Facility against the Extremes

The Duro-Last roof system is second to none when it comes to protecting your facility against high winds, resistance to fire, chemicals, grease, hail damage and punctures.

Here’s how one of our installations survived a tornado –
Tornado No Problem for the Duro-Last Roof on Par Printed Forms

Safe, Simple and Hassle Free Installation

The seaming we are required to make in the field is completed with hot-air welding methods for superior, long-term performance. We do not use open flame, hot asphalt or coal tar, avoid noxious fumes and do not rely on failure prone glue to assemble our roof system. Duro-Last was designed as a re-roofing system allowing us to frequently install a new roof system without the expense of tearing off existing dry insulation. This saves your capital budget and avoids sending material capable of decades more service to the landfill. Each roof is evaluated in detail to determine the most cost effective means of providing a long term, fully warranted roof installation in compliance with state and local code. Installation image of crew installing and hot air welding

Industry Leading Energy-Efficiency


Duro-Last is a leader in cool roofing solutions. The white Duro-Last roof has the highest retained reflectivity of any single-ply membrane roofing product rated by the EPA’s Energy Star Roof Products Program. The Duro-Last commercial roof reflects up to 86% of the sun’s rays, resulting in substantial saving on your energy costs – up to 35%! Your roof will not only keep you dry but will actually help pay for itself through associated energy savings. Plus, non-climate controlled spaces will be cooler, increasing workforce comfort and productivity.

Maintenance-Free Performance

The Duro-Last roof system is maintenance-free other than routine inspections to remove tree leaves or debris and keep rooftop equipment watertight. Eliminate the expense and frustration of costly roof repairs and maintenance programs with Sentry Roofing and Duro-Last.