Our Products & Services

Northern Illinois Seamless Roofing has been recognized as a Duro-Last® Master Elite Contractor

We install and highly recommend the complete line of Duro-Last® roofing products for all your commercial roofing projects:

Duro-Last® Roofing System Elite Master Contractor, Northern Illinois Seamless Roofing, Mendota, Il

Prefabricated Duro-Last® Roofing System

Cool Zone® - Cool Roofing System

Duro-Shield® Metal Retrofit Roofing System

Residential Metal & Flat Roofing

Prefabricated Duro-Last® Roofing Systems

Duro-Last® has been the industry leader in producing custom-fabricated single-ply roofing systems, designing each roof to fit building specifications exactly, and manufacturing it under controlled factory conditions. For building owners and managers, Duro-Last®'s custom fabrication of single-ply roofing systems offers several advantages:read more 

Cool Zone® - Cool Roofing System

In the commercial roofing industry, reflectivity and cool roofing has been the dominant discussion point for several years, and the Duro-Last®® Cool Zone® roofing system has set the standard for single-ply roof reflectivity and the resulting energy savings. Now, terms like sustainability, cool roofs, and cool roofing are receiving a lot of attention, and once again, Duro-Last® is setting the bar. Read More


Duro-Shield® Metal Retrofit Roofing System

Are rusted roof decks and leaky seams starting to compromise your building's watertight integrity? The Duro-Shield roofing system is the long-term way to protect your building against rain, temperature changes, interior drips, ice build-up, and rust and corrosion. The Duro-Shield single-ply membrane is prefabricated in our factory; custom designed to fit your metal roof exactly, eliminating up to 80-85% of rooftop installation labor....Read More

Residential Metal & Flat Roofing

When it comes to installing, replacing or repairing your residential metal or flat roof we can't be be beat.  We're a small company with big company credentials. By keeping our team relatively small to ensure that we have the same handpicked expert roofing technicians on every job, we've been able to earn the Duro-Last® Master Elite Contractor status, recognition usually reserved for much larger commercial roofing companies. What this means to you is that we welcome the smaller residential metal roofing jobs that any other roofing company with similar credentials doesn't want to bother with.  We've repaired, replaced and installed a wide array of metal and flat roofs on mobile homes, porches, additions, single family homes and much more....Read More  

Compare the Facts

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
Curbs & Stacks Custom Prefabricated? Yes No No No
Scuppers and Parapets Custom Prefabricated? Yes No No No
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
Warranty Coverage Repair or replacement Repair only Repair only Repair only
Warranty Provided At No Extra Cost? Yes No No No


                                                  CALL US TODAY FOR YOUR FREE ROOFING EVALUATION

Northern Illinois Seamless Roofing serves LaSalle, Bureau, Putnam, Lee, DeKalb and the surrounding counties