Our History

"GRM windows was founded by my father, Gareth Gambling, in 1979. I joined the business in 1994 with the goal of taking the business forward in an ever changing, competitive marketplace. Today, our philosophy remains to supply high quality windows and doors to the Trade at a competitive price.

To achieve this, we believe in delivering excellent personal service, outstanding aftercare, innovative product development and continuing to invest in top line machinery.

Our factory, based in the heart of South Wales in the village of Pontyclun, has some of the most sophisticated manufacturing machinery available to the industry. This enables GRM to produce windows with fast turn-around, very accurately and efficiently. Our achievements are recognized within the industry and we are proud to be a Rehau Authorized Partner."

- Richard Gambling – Managing Director, GRM Windows Ltd