Bertram Siems

Siems Fenster + Türen GmbH is a German company that specializes in providing high-quality windows and doors for homes. The private company is based in Wiefelstede, Germany. Siems Fenster + Türen GmbH offers a variety of products, including window systems such as Thermoline Premium82, Perfectline82, and Roundline82, as well as house doors and safety fittings. The company's focus is on providing customers with windows and doors that offer heat, calm, and security for their homes. Siems Fenster + Türen GmbH also offers a range of colors and styles to choose from. The company was founded in 1929 by Wilhelm Siems, and it is currently led by CEOs Karl-Wilhelm Siems, Uwe Siems, and Bertram Siems.