Choosing the right window style for your home can feel overwhelming. With so many types of windows available, it’s easy to get confused by terminology – especially when you’re weighing up flush windows vs casement options.
Both window styles have their merits, but understanding the main difference between them will help you make the right choice for your property. Whether you’re renovating an older home or updating a modern property, this guide breaks down everything you need to know about flush casement windows and standard casement windows.
What are casement windows?
Traditional casement windows are the most popular window design in the UK. They feature sashes that project outwards from the outer frame when opened, sitting proud of the window frame even when closed. The openable parts are attached with hinges on one side and typically use a handle mechanism for smooth operation.
Regular casement windows offer excellent ventilation, plenty of natural light and great functionality. They’re available in uPVC and aluminium, with options for double glazing or triple glazing to boost energy efficiency.
At Boston Trade Frames, our casement windows combine durability with clean, simple lines that suit most properties.
What are flush sash windows?
Flush sash windows sit completely flat against the window frame when closed, creating a seamless finish. Unlike traditional casement windows, there’s no projection – the window panes sit flush with the outer frame, replicating the elegance of 19th century timber windows.
This flush casement design was historically found in period properties and conservation areas, but modern flush casement windows in uPVC have made this traditional look accessible to homeowners everywhere.
Our flush sash windows deliver authentic period aesthetics without compromising on performance. They offer the same tight seals and energy efficiency as standard casement window styles, with added character.
Key differences between flush and casement windows
Appearance
The visual difference is the most obvious distinction. Standard casement windows have sashes that sit slightly proud of the frame, while flush windows create a smooth, flat appearance. Flush casement windows are ideal if you want that traditional look, particularly for older homes or properties in conservation areas.
Installation and frame design
Both window styles use similar hinge mechanisms and installation processes. However, flush windows require more precise manufacturing to achieve that perfect fit where the window sashes align exactly with the window frame.
Performance and security
In terms of security, energy efficiency and ventilation, there’s little difference. Both styles offer:
- Excellent thermal performance with double or triple glazing options
- Multi-point locking systems for security
- Effective weather seals
- Low maintenance finishes
- Wide range of colour options, including anthracite grey
According to the Energy Saving Trust, modern double glazed windows can reduce heat loss by up to 50-70% compared to single glazing – regardless of whether you choose flush or standard casement window styles.
Which window style is right for your home?
For period properties
Flush casement windows are often the perfect fit for Victorian or Edwardian homes. They maintain architectural authenticity while delivering modern performance. If you live in a conservation area, flush sash windows may even be required to maintain the property’s character.
For modern properties
Standard casement windows work beautifully in contemporary homes. Their clean functionality and simple lines complement modern architecture, and they’re typically more cost-effective than flush designs.
Personal preference matters
Ultimately, both types of windows offer the same durability, security and energy efficiency. Your choice often comes down to aesthetics and personal preference rather than performance differences.
Choose the right windows with Boston Trade Frames
Whether you prefer the traditional elegance of flush casement design or the straightforward functionality of regular casement windows, Boston Trade Frames has the perfect solution for your home.
We offer both styles of window in uPVC and aluminium, with extensive colour options and decorative glazing bars available. All our windows deliver outstanding energy efficiency, security and durability.
Ready to explore your options? Get a free quote today, or speak to our expert installers who can guide you through the best window design for your property.
Your new windows are just a conversation away.
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