We believe the Guarantee we offer gives the best product protection scheme in the industry today. Our thirty-four page comprehensive Guarantee is available to you before you sign your Contract. It is a no-nonsense guarantee written in plain English that covers every aspect of you project. Banbury is one of the few companies that offer 10-year Guarantee on Hardware moving parts and on Glass Sealed Units. Most 10-year guarantees cover the profile only for 10-years.