Is Double Glazing Worth It for Sash Windows?


  • Hey everyone, I’ve got some old sash windows in my house, and while I love the character they add, they’re just not great when it comes to insulation. In winter, the drafts are terrible, and I feel like I’m throwing money away on heating. I’ve heard about double glazing for sash windows but have no idea how effective it actually is. Does it really help with energy efficiency and noise reduction? Also, is it better to replace the windows entirely or retrofit double glazing into the existing frames? Would love to hear from someone who’s been through this process!



  • Absolutely, double glazing can make a huge difference for sash windows. Retrofitting double glazing into your existing frames is a great option if you want to keep the original look while improving insulation. The process involves fitting slim-profile double-glazed units into your existing sashes, which helps retain heat and reduce noise significantly. I went through this myself and was surprised by how much warmer my house became in winter. Plus, it’s often more cost-effective than full replacement, and many companies specialize in this process. If you're looking for a reliable option, check out this guide https://chameleon-decorators.co.uk/sash-windows-double-glazing/. They explain the benefits and process in detail, and their approach is great for maintaining the traditional aesthetic of your home.


  • I’m really glad this topic came up! I’ve been thinking about double glazing for my sash windows too but wasn’t sure whether retrofitting was a viable solution. It’s good to hear that keeping the original frames while upgrading the glass is possible. That’s exactly what I was hoping to do instead of replacing everything. Definitely going to look into this further.


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