Please note that our Partners are 3rd party companies who can provide a survey, supply and installation service for our products. They are not endorsed or inspected by Arkay Windows for the quality of their installation work. It is recommended that due diligence checks are undertaken. Any guarantees or warranties relating to the product or installation work would be provided by the 3rd party company directly, not Arkay Windows. If you are looking to replace your glazing, do ensure that you use a company who is a member of a scheme like FENSA or Certass for self-certifying compliance with the Building Regulations.