IKO is among the top vertically-integrated manufacturers in its industry, making almost every major component that goes into its roofing shingles and related roofing products.

IKO’s self-reliance on supplying most of its own materials means it is able to control its quality in a way very few competitors can match.

A plant in Clarksville, Tennessee, produces the wet chop glass fiber strands that another plant in Danville, Illinois, uses to manufacture fiberglass mats that are among the heaviest in the industry.

An IKO-owned plant in Barrie, Ontario, extrudes and prints the plastic wrappers that protect every plant’s finished shingles in transit.

IKO also oxidizes its own weathering asphalt; almost 200,000 tons of asphalt flux are stored at IKO plants. IKO quarries and crushes its own limestone, colors its own granules and make its own backsurfacing at a variety of locations across North America.