SIGMA is an independent aluminium door and window specialist manufacturer based in Banwell, Somerset, operated by Pamela Cross and Richard Glass (Dee).

SIGMA; name sake to Pam and Kevin’s two children Sian(SI) and Gemma(GMA) is also the 18th letter of the Greek alphabet meaning “sum” which was Kevin’s ethos; A start-to-finish process, leaving no stone unturned to deliver superior service and a superior product. But in essence, a SIGMA product has always been much more than just the sum of its parts.

SIGMA Windows was founded in 1988 by Kevin Cross. Along with his first and only employee – Dee, their professional and skilled craftsmanship brought SIGMA local success on both a residential and commercial platform. They worked tirelessly to meet the needs of their clients, providing a comprehensive portfolio of aluminium framing for anything from a small residential to a large commercial project. Kevin’s work was always synonymous with excellence.

Pam took on the business in 1995, after the passing of her husband Kevin. With a small but very skilled workforce she has maintained his commitment to providing exceptional quality products and service with the same industrious work ethic. Dee became a joint director of Sigma in 2010 and the company now remains in their more than capable hands. You only need look at the product portfolio to understand why SIGMA is so highly regarded in the industry.

SIGMA represents the same values of reliability and quality that we have always stood for. Whilst we move with the times, complete customer satisfaction will always be at the core of our business. Please have a look at our product list and don’t hesitate to get in touch with Myself or Dee if you have any questions.” – Pam Cross