Casement windows are the most popular style of replacement window in the UK – an extremely versatile window that will suit all styles of home ensuring you can make a real statement.
Featuring fixed panes, top opening fanlights and side opening lights, casement windows can be combined to create an almost limitless range of styles.
With many additional features such as decorative glass, georgian bars and run-through sash horns, casement windows can be tailored to your specific requirements and are available in a range of finishes and colours.
Contact us today for a free quote!

All of our window styles no longer have to be just white, you can now choose colour for your windows, a smooth or grained finish to complete your look with dual colour available. Visit our colour page to view the wide range of finishes and colours available and envisage what they could look like in your home.

- Profile depth 70mm
- 5 chambers
- Maximum sash size 1200 x 1200mm
- Thermal performance 1.3 W/m2K
- Maximum sash weight 35kg
- Double and Triple glazing available
- Single and dual colour
- Flush option available
Low maintenance
Quality and performance
Acoustic performance
Energy efficient windows
Enhanced security
Weather performance
With Herts Glass’s uPVC Casement Windows, you don’t just upgrade your home, you make a smart energy-saving choice. Crafted from REHAU TOTAL70 window systems, our windows boast superior thermal properties and the highest possible Window Energy Rating (WER) of A+, guaranteeing maximum thermal efficiency.
This translates to substantial energy savings for you as the efficiency of your home increases. Not only do our TOTAL70 windows and doors meet and exceed Part L Building Regulations*, they offer an impressive overall U-Value of 0.8 W/m2K when paired with triple glazed Argon sealed units, far surpassing the standard requirement. This means lower energy consumption, less expenditure on heating and cooling, and a reduced carbon footprint – a win for both you and the environment


