resource hub | Single glazed windows and existing external elements

Single glazed windows and existing external elements

Buildings in a conservation area have caused problems for builders for a number of years when achieving satisfactory performance. If the conservation officer feels that upgrading certain elements for the purpose of Building Regulations have an impact on the historic status then they will not allow them to be carried out.


What is required for our warranty purposes?


If existing windows are being retained in a property and covered by the listing then a copy of the listed building consent will be required providing confirmation of this.  A RICS surveyor or window repair/renovation specialist will also need to give a full condition report stating that the existing windows have the capability to form a waterproof barrier for 15 years. A full repair schedule should also be provided if there is any work being carried out on them. 


How does it work with external walls and roofs?


Similar to windows, a listed building consent is required confirming that the existing walls/roofs need to remain. They will also require a full condition report by either a RICS surveyor or industry specialist that confirms the walls/roof are structurally sound for 60 years or 15 years if just performing as the waterproof barrier.


More information:


On any of these areas please refer to our technical manual which is free to download here, email or call 08444 107 8446.


Hardcopy technical manuals are provided free of charge for all sites registered with Premier Guarantee and you will have a dedicated Risk Management Surveyor who will work with you to develop technical solutions on site.