Custom Duro-Last roofs are analyzed by the Manufacturer’s in-house engineers to deal with the unique architectural features of your roof and local weather. Roof sections are factory welded together and inspected in a controlled environment along with accessories integral to your roof’s details. The membrane’s thickness over scrim is 28 mil, ensuring that the weather facing side can stand the test of time. Finally, nothing is left to chance - upon installation completion, each roof is independently inspected with every inch of every hemimembrane seam tested to ensure there is no weak point in the system.