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| Antique Doorknob Collectors of America Protecting, preserving, and studying the wide range of ornamental builders hardware that is a part of America's heritage. http://www.antiquedoorknobs.org/ |
| Australian Window Association, Inc. Representing manufacturers of all residential window products including timber, aluminium, uPVC, and steel. http://www.awa.org.au/ |
| British Woodworking Federation Represents manufacturers of doors, windows, and engineered timber components. http://www.bwf.org.uk/ |
| Door and Hardware Institute Serves as the resource for information on doors, hardware, security and specialty products for the architectural openings industry. http://www.dhi.org/ |
| Glass and Glazing Federation Recognised UK trade association for employers and companies in the flat glass industry. http://www.ggf.org.uk/ |
| Horner Millwork Manufacturer and distributor of doors, windows, kitchens and stairs to the residential, commercial and architectural markets. http://www.hornermillwork.com/ |
| International Door Association Has dealer members world-wide who furnish and install garage door opening systems and industry members which manufacture and distribute them. http://www.doors.org/ |
| National Glass Association (NGA) Providing education and information for the glass industry. http://www.glass.org/ |
| National Sash & Door Jobbers Association National Sash & Door Jobbers Association. http://www.nsdja.com/ |
| Window Wise National Certification Program Audits and certifies contractors and window manufacturers, and conducts training seminars for installers. http://www.windowise.com/ |
| Woodgrain Millwork, Inc. Manufactures and distributes doors, vinyl and wood windows, finished and raw mouldings, and millwork for the housing industry. http://www.woodgrain.com/ |