Astragal bars vs. Georgian bars
Modern uPVC sash windows can be made to match traditional styles and the general look of your property. Reputable manufacturers and installers allow you to create bespoke windows – one choice to make is between authentic astragal bars or internal Georgian bar window alternatives.
So which is better? We take a look at the differences and benefits of both.
What is an astragal bar?
Astragal bars are fixed to the windows’ glazing, both internally and externally. They separate panes of glass, giving the effect of traditional period features. In other words, these bars are applied to a single piece of glazing but create the effect of multiple panes of glass, enhancing the window’s classic appearance.

What is the purpose of an astragal bar?
The bar is installed on a window to give it the traditional appearance of individual windowpanes. By dividing the glass pane area, they can provide more privacy and add security by making it more difficult to force entry.
What is a Georgian bar?
Georgian bar windows are set inside the sealed unit, which means that they are sandwiched between layers of glazing. Rather than being added to the glazing, they are sealed within the Georgian bar window unit interior to achieve the traditional Georgian design.
What is the purpose of a Georgian bar?
Like astragal bars, Georgian bars not only enhance the traditional appearance of older buildings but also provide protection against intruders. They do this without limiting the natural light entering your home.
Replicate tradition with modern materials
Modern uPVC sash windows successfully imitate traditional styles. Part of this lies in their detailing and whether they include period features such as astragal bars or internal Georgian bars. Both options add elegance to properties, especially when combined with state-of-the-art uPVC, hardware and a dedicated installer.

Whether you choose astragal or Georgian bars, neither will affect the energy efficiency or style of modern uPVC sash windows. Reputable companies will offer double glazing as standard, along with a range of accessory options, making it easy to design and install bespoke Georgian-style windows for your home.
Suited to different homes
If your home is more contemporary, it will suit both Georgian and astragal bars (the latter of which are available in a range of period designs). As always, it is important to choose windows that reflect your home’s architectural style. It really is up to you which feature you feel best suits your home. It’s easy to take creative control when the options are available!
If you really want to maximise the authenticity of traditional sash windows, then opt for astragal bars. Modern uPVC windows have been accepted in conservation areas including Chelsea, Kensington and Cambridge. It’s the fine details, such as astragal bars, that give the imitation of traditional wooden windows, without the price tag.
The UK’s leading uPVC sash window company
Whether you want to replicate tradition with astragal or Georgian bars. Choosing uPVC sash windows from the Rose Collection guarantees traditional aesthetics with modern functionality. We were the first company to offer UK homeowners uPVC sash windows. This has made our products the best on the market and our team the most knowledgeable.
All of our windows come double-glazed as standard, offer fantastic energy efficiency and are available in a wide selection of colours or with added accessories. All three of our uPVC sash window models: Ultimate Rose, Heritage Rose and Charisma Rose, have the option for astragal bars. The latter two collections also offer Georgian bars, making them perfect for cost-effective updates to any property. Our windows are made to complement many period homes seeking classic Victorian, Edwardian, and Georgian sash windows.
So whether you want externally added astragal bars or internally set Georgian bars, The Rose Collection offers both, making us a great choice if you want creative rein over your home improvements.
What are astragal bars?
Astragal bars are fixed to both sides of the glass and include a spacer bar between the panes, giving the appearance of individual glazed sections.
What are Georgian bars?
Georgian bars sit within the sealed double-glazed unit, creating a grid-like effect that mimics traditional glazing but with a flatter finish.
How do astragal and Georgian bars differ in appearance?
Astragal bars offer a more authentic, three-dimensional look, while Georgian bars provide a simpler, smoother finish that’s easier to clean.
Which bar type offers better authenticity for period properties?
Astragal bars are more historically accurate and are often preferred for Georgian-, Victorian-, or Edwardian-style homes seeking a traditional look.
Are astragal bars more secure than Georgian bars?
Yes, because they’re applied on both sides of the glass, astragal bars can enhance the window’s rigidity and improve security.
Categories: uPVC Sash Windows
