
Project Overview
Location: Doncaster, England
Installer: A1 Windows Gateshead Ltd
Building Type: Department of Justice Probation Centre
Product: ECOSlide® Sash Windows
Quantity: 100 Windows
U-Value: 1.3 W/m²K
Installation Time: 3.5 weeks
Key Features: Crystal White, Satin and Cotswold glazing, splayed bay windows, Astragal bars
The Brief
Working on behalf of a Department of Justice probation centre in Doncaster, A1 Windows were tasked with replacing 100 windows across a three-storey building.
Given the scale of the project, the specification needed to accommodate a range of window configurations and privacy requirements while maintaining a cohesive appearance throughout the property.
To meet these requirements, A1 Windows selected ECOSlide® sash windows in a Crystal White finish, incorporating Satin and Cotswold obscure glazing where additional privacy was needed.
Speaking on the project, David Black of A1 Windows Gateshead Ltd commented:
"Projects of this size require a product that's dependable and adaptable. The combination of ECOSlide® sash windows, bay configurations and privacy glazing allowed us to meet the varied requirements of the building while maintaining a cohesive finish throughout.”
A Large-Scale Installation
Installing these windows across a three-storey building required careful planning and coordination from the A1 Windows team.
The project consisted of:
- 32 frames on the ground floor
- 37 frames on the first floor
- 31 frames on the second floor
Alongside the standard window specification, the project also included a number of splayed bay window configurations, requiring careful planning and installation to ensure a seamless finish across the site.
Tailored Specification
To ensure the finished installation met both practical and performance requirements, A1 Windows Gateshead Ltd specified ECOSlide® sash windows with a 1.3 W/m²K U-value.
The specification also included:
- Crystal White finish
- Single astragal bar configuration
- Satin obscure glazing
- Cotswold obscure glazing
- Splayed bay window arrangements.
This combination of features enabled A1 Windows Gateshead Ltd to provide a solution tailored to the operational requirements of the building while delivering a clean and professional finish.
The Result
The completed installation showcases A1 Windows Gateshead Ltd and there dedicated staff’s ability to deliver large-scale replacement projects across public-sector buildings.
By combining a carefully considered specification with expert installation, the team successfully delivered 100 ECOSlide® sash windows across the site, accommodating varying privacy requirements and bay window configurations without compromising on the overall finish.
About A1 Windows Gateshead Ltd
A1 Windows Gateshead Ltd are experienced manufacturers and installers serving customers across the North East and North Yorkshire and to the Scottish Borders delivering high-quality window and door solutions across residential, commercial and public-sector projects.


