Muntin bars (also called glazing bars or window dividers) are decorative elements that visually divide a large glass pane into smaller sections. Once a practical necessity that held individual glass pieces together, today they are used mainly for aesthetic purposes. Modern glazing bars add structure and style to windows, bringing a sense of balance and rhythm to both classic and contemporary homes.
At Fenbro, we offer two main types of window dividers: glued-on muntin bars and inside-glazing muntin bars. Each offers a unique visual effect – keep reading to find out which one will suit your home best!
Why muntin bars are used in modern windows?
In the past, these dividers were used to join smaller glass panes into a single window. Although they no longer serve a structural purpose, window grids still play an important role in modern design. They add rhythm, proportion and individuality, making any building look more elegant and refined. In traditional homes, this feature brings back the charm of classic architecture, while in modern projects it acts as a subtle accent. With many widths, colours and styles available, these bars can easily complement both minimalist aluminium and decorative uPVC windows.
What types of muntin bars are there?
Muntin bars come in several forms, depending on how they’re made and installed. At Fenbro, we focus on two modern and visually appealing solutions. Read on to learn more about them.
Inside-glazing muntin bars
If you enjoy a clean, modern look and windows that are effortless to maintain, inside-glazing muntin bars are an ideal solution. These accents are placed between the panes of glass, meaning the outer surface of the window remains completely smooth. Unlike traditional bars, they don’t interfere with cleaning and don’t require any upkeep – great for those who value both design and practicality.
Made from durable aluminium, inside-glazing bars offer a clean, contemporary finish. Hidden between the panes, they keep the glass smooth and easy to maintain while adding a subtle decorative touch. You can choose from four widths – 8, 18, 26 or 45 mm – and match them to your frame using decorative veneers or colours from the RAL palette.
Glued-on muntin bars
For homeowners who prefer a more decorative and traditional look, glued-on muntin bars are a perfect choice. These elements are attached to both sides of the glass using a special adhesive layer that imitates the division of separate panes.
Glued-on glazing bars are available exclusively for uPVC windows and come in widths of 26 mm, 46 mm and 66 mm. They can be easily installed or replaced during the window’s lifetime, making them a convenient and flexible decorative option. You can choose from a wide range of veneers matching the uPVC window profile colours – from warm wood-like finishes to minimalist greys or elegant whites.
Design enthusiasts often opt for black muntin bars to create a beautiful, modern contrast, while light-coloured accents help to achieve a soft, classic look. Some versions are even available as removable muntin bars, which makes cleaning easier and allows for style changes in the future.
Design inspirations – how to match muntin bars with your home style
Ever wondered how a small window detail can change the look of an entire house? Decorative grids add character and proportion to any design – from traditional cottages to modern minimalist homes.
- Modern homes – choose inside-glazing muntin bars in subtle tones such as black, grey or white. They maintain the minimalist aesthetic of large glazed surfaces while adding a touch of visual structure.
- Traditional or cottage-style houses – opt for glued-on muntin bars in white or woodgrain finishes. They reflect classic craftsmanship and flawlessly match natural materials like brick or timber facades.
- Industrial or loft-inspired interiors – pair black muntin bars with slim aluminium frames for a bold, geometric look that adds contrast and character.
- Scandi or coastal designs – lighter grids in muntin bars create soft divisions and let natural light take centre stage, making interiors feel bright and calm.
Fenbro gives you the freedom to customise every detail of your muntin bars in windows, including their colour, width and material, to perfectly complement your home’s design. Curious about other clever window details? Check out our articles about warm edge spacers and hidden hinges.
Conclusion
Sometimes, it’s the smallest detail that changes everything. A simple decorative line across the glass can turn a standard window into a statement piece, adding a touch of individuality to your home.
At Fenbro, we see design as something deeper than function. It’s about comfort, balance and that quiet sense of satisfaction when everything fits just right. That’s why we give you the freedom to personalise every detail of your windows, making them a natural part of your home.
Have a project in mind? Contact us and let’s talk and find the perfect solution for your property!
Frequently Asked Questions (FAQ)
1. What are muntin bars in windows?
Muntin bars are decorative dividers that visually split one large glass pane into smaller sections, adding style and character to a window.
2. What types of muntin bars are there?
There are several types of muntin bars, depending on how they’re made and installed. The most common ones include glued-on muntin bars, which are fixed directly on the glass surface, and inside-glazing muntin bars, placed between the panes. Fenbro offers both options in various widths and colours.
3. Do muntin bars fit modern homes?
Absolutely. For example, black muntin bars combined with slim frames are a popular choice for contemporary architecture. Fenbro’s customisable designs allow you to achieve a modern look without losing the decorative touch.
