The Duro-Last Manufacturing Process

Every Duro-Last roofing system is precision-fabricated to fit even the most complicated, uniquely-shaped rooftops. Every Duro-Last system is delivered to the job site with all components included and up to 85% of membrane seaming completed in our factory. Also, custom fabricated parapets, and stack and curb flashings eliminate the majority of labor from the most critical roof areas – transitions and changes of plane. Prefabrication enables authorized Duro-Last contractors to install faster, with less disruption and fewer callbacks.

Duro-Last's Engineering Services Department offers technical support, including CAD services, to create a roof customized to each building's specifications.

The Quality Control Lab performs a variety of standardized tests on all components of the Duro-Last roofing systems.

To ensure quality at the onset, this calender machine distributes film evenly.

Knitting machines produce a high-density polyester weft-inserted scrim.

The laminator then bonds together the top and bottom layers of the film with the scrim.

Quality control is a priority. This employee performs an inspection of a completed roofing membrane.

Rolls of membrane are re-inspected off the line.

Membrane sheets are welded together and prefabricated to a building's exact dimensions as specified by the architect, specifier or contractor.

A fastening tab is welded into the membrane sheet for attachment to the roof deck.

Orders are measured and squared-up on the folding floor.

Folding floor inspectors examine every factory seam of the Duro-Last roofing system before it leaves the manufacturing facility.

Custom-made pieces are folded from fastening tab to fastening tab, making installation easier.

Duro-Last provides custom-made accessories for all penetrations and details.

All pieces are rolled and stretch-wrapped, ready for delivery to the job site.

Duro-Last's in-house training classes provide contractors with the know-how to install the Duro-Last roofing systems.

EXCEPTIONAL Metals' state-of-the-art equipment precisely fabricates products with consistent high-quality and provides a quick turnaround time.

Scuppers, pitch pans, and collector boxes eliminate the need for field fabrication and help increase installation efficiencies.

Our skilled craftsmen take pride in fabricating a variety of products and materials, including components made from copper, aluminum, and stainless steel.