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Award Winning Commercial Roofing Contractor 1 (800) 446-2133

3245 West US Hwy 136, Covington, IN 47932

Duro-Last Roofing



Duro-Last Roofing Systems Installed by Sentry Roofing

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.

Duro Last - Commercial Roofing Contractors Indiana
Duro-Last: Providing the World's Best Roof
Duro Last Low Slope Roof Installation - Danville IL Commercial Roofing Contractors
Duro-Last low slope roof installation at Family Video, Danville, IL

Our Duro-Last Experience

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.

Sentry Roofing is an authorized contractor on the Duro-Last Contractor Advisory Board.

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.

Metal Roof Curb Stack Leak Before Sentry Roofing
Fix & prevent leaks while saving money on labor costs

"I will give Sentry absolutely 5 stars. These are the guys that need to do your roof. They know what they’re doing and they know how to put it up there. They care and they’re just nice people to work with."

- John Benson, Facility Director

Commercial Flat Roof Repair Indiana
Duro-Last roof systems are backed by industry leading warranties

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.

Take a look at this article written about a building that was struck by 5 tornadoes in Indianapolis, Indiana back in 2004.

If you look at the other rooftops in the image, many other building’s roofs were destroyed or left mangled during that tornado, while the Par Printed Forms’ roof was in pristine condition.

The aerial view of the damage caused really shows the durability and strength of the Duro-Last roof membrane.


Duro-Last Roof Tornado Case Study
Click the image to enlarge the article to read.
Commercial Roofing Company Illinois
Installing Duro-Last roof on Crossroads Church
Duro Last Commercial Roofing Contractors Illinois
Performing hot air welding on prefabricated stacks

Safe, Simple, & 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. 


"The project Sentry Roofing installed was done at a price that was very competitive and performed by workmen that meticulously applied their skill and provided a finished project that exceeded my expectations. I never had to worry about anything!"

- Rob A., Project Manager

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.


Aerial view thermal imaging of rooftop heat levels
Are your energy readings making you see RED?
Top Quality Commercial Roofing Contractors Indiana
2016 Platinum Contractor Award Winner

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 by partnering with Sentry Roofing and Duro-Last.

Duro-Last System Installation Service Areas

Sentry Roofing Coverage Area
  • Covington, IN
  • Brownsburg, IN
  • Indianapolis, IN
  • Seymour, IN
  • Lafayette, IN
  • Greenwood, IN
  • Shelbyville, IN
  • Muncie, IN
  • Danville, IL
  • Paris, IL
  • Mattoon, IL
  • Decatur, IL
  • Effingham, IL
  • Bloomington, IL
  • Peoria, IL
  • Chicago, IL

Protect your facility, business and building occupants with a contractor team you can trust!

Get a Free Rooftop Evaluation