Ply Gem Holdings brings out a new side of homes. A holding company, Ply Gem Holdings operates through its primary operating subsidiary, Ply Gem Industries, a manufacturer and supplier of exterior building materials used in home construction and renovation. The subsidiary supplies its products-- including vinyl siding, aluminum windows and doors, stone veneer, and fencing -- to home-center retailers, distributors, construction companies, and contractors in North America.

Chas Roberts isn't just the name on the door. Chas and Alice Roberts founded Chas Roberts Air Conditioning in 1942. The business has been family owned and operated since day one.Prior to founding the business, Chas worked as a serviceman for the local utility. In the early years, sales consisted of home appliances, coolers, furnaces, air conditioners and service. In the 50s and 60s, the company grew doing retrofits of houses with coolers to air conditioners, new installs in custom and tract homes and light commercial air conditioning. Chas Robert's son, Chuck, took over managing the company in the 60s and provided the vision for future growth.

South Coast Lumber makes and distributes plywood, veneer, and related products. The company owns Douglas fir timber, timberlands and production facilities in southern Oregon's Curry County. South Coast Lumber works in affiliation with engineered wood manufacturer Pacific Wood Laminates and CLR Timber Holdings, which harvests timber and sells logs to the company. All three enterprises, which share common ownership and management, use the trade name SOCOMI, which stands for South Coast Milling. Products include plywood, laminated veneer lumber, and siding.

Corna Kokosing provides general contracting services for commercial, industrial, institutional, and health care construction projects, primarily in central Ohio. Services include construction management, design/build, and finance services for new construction and renovations. The company also performs construction services ranging from carpentry and drywall installation to metal building erection and demolition. Stonemason Al Corna and carpenter Joe DiCesare co-founded the company in 1956. Midwest heavy construction group Kokosing Construction acquired Corna Kokosing 40 years later.

The BSS Group. The company buys, sells, and distributes pipeline, heating, plumbing, ventilation, and other products. It serves the building services, manufacturing, maintenance, and other sectors through its industrial, domestic, and specialist divisions. The domestic division operates through about 300 PTS (Plumbing Trade Supplies) branch locations. The industrial division serves commercial and industrial customers through nearly 65 branches in the UK and Ireland. Building materials and home improvement retailer Travis Perkins bought BSS in 2010.

Ballast Nedam is definitely not dead weight in the Dutch construction industry. One of the largest firms of its kind in the Netherlands, it provides development, engineering, construction, maintenance, and management services. Its building and development division is involved in construction of homes, apartments, commercial and industrial buildings, schools, and car parks. Its infrastructure division performs road construction, earth moving, drilling and anchoring, landscaping, environmental consulting services. The unit also operates prefabricated concrete factories and other raw materials providers.

HeidelbergCement AG has operations in 40 countries in Africa, Asia, Australia, Europe, and North America. Subsidiary Hanson is a top building materials company in the UK. HeidelbergCement believes in concrete results. The company is one of the world's leading producers of cement and clinker (more than 100 million tons annually), and concrete; it is the largest cement producer in Germany. Cement, concrete, and aggregates together account for more than 90% of the company's sales. HeidelbergCement also has group services which manage fossil fuels and electricity for its operations and trade internationally in cement and clinker (an intermediate product used to make portland cement).

Tenon has neatly dovetailed its Kiwi and American operations in the pine-products business. The company (formerly Fletcher Challenge Forests) processes Radiata pine from New Zealand and makes such products as molding and millwork, primarily for the US market. Through subsidiaries, the group supplies finished moldings and boards to such customers as The Home Depot and Lowe's; it also provides appearance-grade lumber to other molding and millwork makers. Operating units include the Empire Company, Fletcher Wood Solutions, Ornamental Mouldings, and Southwest Mouldings. Rubicon Forests Limited controls more than 55% of Tenon.

Ducts Unlimited Mechanical Systems helps businesses maintain the perfect business environment. The company offers commercial HVAC installation (heating, ventilating, and air conditioning) and related services to various businesses in the Denver metropolitan area. Ducts Unlimited does everything from maintenance of existing systems to ground-up system installation; it also specializes in the maintenance and installation of computer room A/C systems. Additionally, the company runs a sheetmetal fabrication shop that serves the company's commercial customers and sheetmetal contractors. Founded in 2000, Ducts Unlimited is privately-owned and headed by president Robert Leishman.

MasTec, Inc. operates as a specialty contractor in the United States. It involves in the building, installation, maintenance, and upgrade of utility and communications infrastructure. The company builds wind farms, solar farms, and underground and overhead distribution systems, such as trenches, conduits, cable, power lines, and pipelines, which provide wireless and wireline communications, electrical power generation and delivery, and natural gas, crude oil, and refined products transport. It also installs buried and aerial fiber optic cables, coaxial cables, copper lines, electrical and other energy distribution systems, transmission systems, and satellite dishes, as well as deploys and manages network connections. In addition, MasTec offers regular maintenance of distribution facilities and networks, as well as provides emergency services for accidents or storm damage. It serves utility, communications, and government customers. The company was founded in 1929 and is headquartered in Coral Gables, Florida.

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