Glevum are a leading installer of UPVC conservatories, doors and windows. Based in Gloucestershire the firm has been trading for over 40 years and has established a reputation for a high quality product, using only the best materials and their own installers who are dedicated to a high standard of workmanship. In addition to our thriving home improvement business that has improved over 40,000 peoples' homes, the Glevum group is also active in: Windows, doors and conservatories for newbuild developers and housing associations. Windows and doors for commercial properties and developments. Build and refurbishment of motor dealerships.