CHAS
Certificate type
This version of the third-party certification is no longer available. View latest
CHAS
Certificate type
Provided by CHAS
Date of first issue: 02/01/2016
Date of last issue: 22/12/2021
Expiry date: 30/12/2022
Traditional Box Sash Windows - Single - Timber sash window
Heritage Sash Windows - Double - Timber Sash Window
Traditional Box Sash Windows - Triple - Timber Sash Window
Traditional Tilt & Turn Timber Windows – Tilt & Turn Floating Mullion
Traditional Flush Casement Timber Windows - Top Hung Over Direct Glazed
TRC Sash Window Renovation | Restoration | Refurbishment with High Performance Draught Proofing and replacement double or single glazing - Restoration
TRC Replacement Glass with Slim Double-Glazed Units - Restoration
TRC Casement Window Renovation | Refurbishment | Repair with High Performance Draught Proofing and replacement double or single glazing - Restoration - Restoration
Heritage Period Doors - Double
Traditional Box Sash Windows - Double - Timber Sash Window
Traditional Flush Casement Timber Windows - Top Hung Over SideHung
Traditional Spring Sash Windows - Triple