The Difference Between Casement and Sash Windows
We’ve helped hundreds of customers across Scotland choose between casement and sash windows
When you’re replacing windows or choosing them for a new project, getting the style right is just as important as getting the performance right. We’ve helped hundreds of customers across Scotland choose between casement and sash windows, and we know that each has its strengths depending on the home, the setting, and the look you’re aiming for.
In our experience, many homeowners and trade customers come to us knowing what they like the look of but they’re unsure how that style will function day-to-day. That’s where we step in. The practical difference between casement and sash windows isn’t just about how they open; it’s about airflow, cleaning, energy efficiency, heritage considerations, and budget.
Both types of window can be manufactured to meet high thermal performance and quality standards, especially when they’re produced using reliable profiles like those we fabricate ourselves. But one is likely to be a better match for your property and priorities than the other. We’ve outlined the key differences below to help you make the right decision.
What Are Casement Windows?
Casement windows are side-hinged and open outwards like a door. They’re one of the most common window types used in modern builds and extensions, offering a straightforward mechanism and strong weatherproofing when closed. Because they can open fully, they’re ideal for rooms that need good ventilation or where airflow is a priority.
We supply uPVC, and fabricate aluminium casement windows in-house using high-quality aluminium materials, which gives us control over the finish, performance, and turnaround. Their design makes them especially suited to properties looking for sleek lines and low-maintenance features, and they’re available in a wide range of colours and configurations. For homeowners looking for maximum glass area and fewer obstructions, casement windows often tick every box.
What Are Sash Windows?
Sash windows, by contrast, have a more traditional opening mechanism. The panels slide vertically (and sometimes horizontally) rather than swinging open. This makes them the classic choice for period homes, particularly in conservation areas or Georgian and Victorian properties across cities like Edinburgh.
Although traditionally made from timber, we manufacture modern sash windows with high-performance aluminium materials, and uPVC options. This improves their energy efficiency, security, and ease of use while preserving the character of older properties. We’ve supplied sash windows for everything from conservation areas to sympathetically styled new builds, and we understand the regulations that may apply.
Comparing Aesthetics and Suitability
If visual appeal is a key concern, your decision may come down to architectural style. In traditional or heritage properties, sash windows tend to look more at home. Their proportions and detailing suit historic facades, and local planning guidelines may even require them. For newer homes or commercial buildings, casement windows provide a cleaner, more contemporary look.
We’ve worked with architects and contractors across Scotland to match window styles with project goals. It’s not just about compliance, it’s about keeping the building coherent and visually balanced. Whether we’re working on a sandstone townhouse in central Edinburgh or a modern rural extension, we make sure the window choice suits the whole project.
Ventilation and Ease of Use
Casement windows tend to offer better airflow because they open fully outwards, catching side breezes and letting air move through the home easily. They’re also typically easier to clean and maintain, especially when installed with side openings or egress-style openings that let you reach both sides of the glass.
Sash windows, on the other hand, can be more practical in tight spaces where an outward-opening window would clash with paths, fences or trees. Their sliding mechanism means they don’t project outward, which is often helpful in urban homes or upstairs windows.
Energy Efficiency and Security
Both styles can be manufactured to meet excellent thermal standards, especially when combined with double or triple glazing. We use profiles with thermal breaks and high-grade sealing systems that prevent draughts and reduce heat loss, whether the window is casement or sash.
Security is another area where our experience makes a difference. We fit multipoint locking systems on casement styles and sash-specific locks and reinforcements on traditional windows. With the right configuration, either option can offer strong security and peace of mind for homeowners or commercial clients.
Cost Considerations
Casement windows generally cost less to manufacture and install than sash windows due to the simplicity of their mechanisms. If you’re working on a large property or managing a tight budget, this could be a deciding factor. That said, sash windows can increase the value of a property by preserving or improving its historic appeal, so they may offer better returns in the long term.
We’re always transparent with our customers about pricing. Whether we’re supplying for a self-build, trade job or installing as part of a larger project, we tailor our quotations to the exact materials, finish and specification required.
So, what do you say? Are you ready to give your home the glow-up it deserves? Reach out, and let’s make those window dreams a reality. After all, the best homes aren’t just seen; they’re felt, right from the curb to the cosy nook by your brand-new window.
Making the Right Choice for Your Property
Choosing between casement and sash windows is never just a design decision. It’s about functionality, planning constraints, thermal performance, aesthetics, and budget. We guide every customer through that process with advice based on years of hands-on experience across all kinds of Scottish homes and developments.
On our website, you’ll find more details about the types of windows we supply, including our supply-only service for aluminium and uPVC frames. We manufacture aluminium products ourselves, which gives us flexibility and control over quality, something our trade clients and repeat customers really value.
If you’re weighing up which window type suits your needs best, we’re happy to help. And if you’re ready for a quote or technical advice, our team can talk you through the options. The right windows make all the difference to your project’s success and we’ll make sure they’re built to last.
We’re always transparent with our customers about pricing. Whether we’re supplying for a self-build, trade job or installing as part of a larger project, we tailor our quotations to the exact materials, finish and specification required.
So, what do you say? Are you ready to give your home the glow-up it deserves? Reach out, and let’s make those window dreams a reality. After all, the best homes aren’t just seen; they’re felt, right from the curb to the cosy nook by your brand-new window.
