CertainTeed Corporation

certainteedCertainTeed Corporation is a manufacturer of exterior building materials for new construction and home remodeling needs. Products included; insulation, vinyl windows, vinyl siding, roofing, ceilings, PVC pipe, fencing, decking, railing, attic ventilation and foundation systems.

GAF Material Corporation

gafFounded in 1886, GAF Materials Corporation has grown to be North America’s largest roofing manufacturer. GAF has had a proud tradition of innovation and excellence that has made them one of the most respected roofing manufacturers in the world.

Owens Corning

Owens-Corning-LogoFounded in 1938, based in Toledo Ohio, Owens Corning develops, manufactures and markets roofing, insulation, and fiberglass composites.

TAMKO Roofing Products, Inc.

Today TAMKO® Roofing Products, Inc. has grown beyond its original building and territory to become a leading national manufacturer of residential and commercial roofing products, waterproofing, cements and coatings. It is still family–owned and operated with the high standards and hardworking ethic that remain reflected in our products.


The company’s branded materials are specified for housebuilding, commercial property and engineering structures in many countries worldwide. In addition, the Group has extensive ‘private label’ manufacturing contracts for specialist distributors and merchants.


 Quality, development and improvement are important keywords at VELUX – not least in our test department, where products are continuously exposed to all kinds of tests as an integral part of our company’s efforts to develop and improve our products.