Established in 1982 in Germany, today aluplast is one of the world’s leading developers and extruders of premium quality PVC-U window and door products with 24 production plants and sales offices and more than 1,400 employees.
Aluplast supplies more 1,600 fabricating customers in 28 different countries, producing nearly ten million windows per year.
Its global scale puts aluplast at the forefront of innovation in energy efficient and sustainable PVC-U window and door systems.

Dr. Hahn Hardware

“Dr.Hahn hinges are subjected to the most diverse strains on a daily basis. Over the years, we have gathered a lot of experience and recognition due to the fact that our hinges are used in many locations throughout the world, as can be seen in our list of references. Hahn hinges can frequently be found in commercial buildings and office premises as well as in private homes, always opening doors …​with hahnfunction”

ASSA Abloy

“ASSA ABLOY is the global leader in door opening solutions and a market leader in most of Europe, North America, South America, China and Oceania.
ASSA ABLOY was formed in 1994 through the merger of ASSA in Sweden and Abloy in Finland. Since then ASSA ABLOY has grown from a regional company to an international group with 47,000 employees and annual sales of SEK 71 billion
ASSA ABLOY has a complete range of door opening products, solutions and services for the institutional, commercial and consumer markets.
Using the latest technologies and tried-and-tested techniques, we are constantly developing innovative solutions that improve our customers’ lives through greater security, safety and convenience.
The solutions and services provided by ASSA ABLOY Group covers areas in;”

Retrieved from About us

HOPPE Hardware

HOPPE North America specializes in precision hardware for doors and windows. We feature a broad product range of North American and European high performance products and offer exceptional service to our distribution partners. Multipoint locking systems for doors and windows with complimentary handle sets and adjustable hinges are featured product lines. We also offer a palette of hardware solutions such as Lift and Slide hardware for premium sliding doors and Tilt and Turn window hardware for high performance windows.
Retrieved from HOPPE North America

Cardinal corp.

Cardinal Glass Industries is a management-owned S-Corporation leading the industry in the development of residential glass for windows and doors. We have grown to more than 6,000 employees located at 37 manufacturing locations around the United States.
At Cardinal, we try to maintain a clear vision: design and fabricate the most advanced residential glass products in the industry.
We start with a heavy investment in research and development. Our twin R&D centers in Minnesota and Wisconsin provide the basis for new advances in glazing fenestration.
We turn around those fresh ideas into useful products that regular homeowners can use. We provide a turnkey solution to window manufacturers: whether it starts with insulating glass, coated, laminated, tempered or just plain float glass, it is all designed to provide the latest in applied glass science.
Retrieved from About Cardinal


Headquartered in Houston, Texas, with locations around the world, Quanex Building Products Corporation is an industry-leading manufacturer of components sold to Original Equipment Manufacturers (OEMs) in the building products industry. Quanex designs and produces energy-efficient fenestration products.
Retrieved from About Quanex