Welcome to the CGMA

The CGMA has been set up by leading manufacturers of glassfibre chimneys, dormer windows and bay roofs in response to the need to set common standards of performance and quality.

The use of these major prefabricated building components has grown rapidly within the new housebuilding sector due to their speed of construction, durability and consistent quality. However it was recognised by the industry and in discussion with and under the close guidance of the NHBC, the leading underwriter for the new housebuilding industry that the formation of a single industry body to represent manufacturers would lead to improved quality and professionalism within this important component supplier to the new housebuilding sector.



New NHBC guidance on GRP prefabricated building components announced.