Founded in 1972 in New Kensington, PA, Thermo-Twin’s core business was supplying window manufacturers with insulated glass units.  In 1974, business expanded into general home remodeling and we began manufacturing our own windows, using frames and sashes produced by various suppliers.

In 1981, our Company began selling windows under the trade name, Thermo-Twin Industries, Inc. and moved from its original location to a 55,000 square foot manufacturing facility in Oakmont, PA.  This allowed for additional growth and for the window and glass operations to be housed together.  In 1987, Thermo-Twin began manufacturing windows using vinyl extrusions.               

1987 was a defining year for Thermo Twin.  This is the year that our Company became Employee-Owned!  Through an Employee Stock Ownership Plan, the employees purchased the company from its original owner.  In 1991, Thermo-Twin opened its first branch sales office in Toledo, Ohio.

Our Company’s success and growth continued into 1992 with the acquisition of Amacor’s assets.  This development allowed Thermo-Twin to increase production of thermalized commercial and heavy commercial products.

Thermo-Twin opened a branch sales office in Akron, Ohio in 1993.  Then, in 1995, we purchased a 150,000 square foot manufacturing facility in Oakmont, PA where we still manufacture our custom windows and maintain our corporate headquarters.

In 1996 Thermo-Twin acquired the assets of Holloway Supply Company.  With this development, Thermo-Twin expanded its product line by offering custom made and new construction aluminum-clad wood windows.  A sales branch office was also opened in Erie, PA.  

In 1997, the Technology Council named Thermo-Twin among the fastest growing technological companies in the region, and in 1998, the Pittsburgh Business Times recognized Thermo-Twin as one of the area’s 100 fastest growing companies.  

In 2000 Thermo-Twin became the first company in North America to purchase and install the fully automated “Super Spacer®” glass line.  This space–aged technology helps reduce condensation and makes window systems that are quieter and more energy efficient than those with traditional metal spacers.  

Thermo-Twin achieved another milestone in 2004, by offering customers state of the art patio room enclosures through its newest sales division, LeDonne Patio Rooms.  A branch sales office was opened in Jamestown, NY.   

2005, Qualified Remodelers Magazine listed Thermo-Twin 59^th of the top 500 remodeling companies in the country.

2006, Qualified Remodelers Magazine has listed Thermo-Twin 45th of the top 500 remodeling companies in the country and 35th in the top 200 specialty remodeling companies in the country.

Most recently, in 2007 Thermo Twin is listed in The Top 100 Manufacturers by Window & Door Magazine.