Windows uPVC Sash
Traditional Character. Modern Efficiency.
Bring heritage style and warmth back to your home with Thermaseal’s beautifully engineered uPVC sash windows. Perfect for period properties or anyone who loves classic Georgian or Victorian aesthetics, our sash windows combine elegant proportions with modern-day performance.
Why Choose Sash Windows
We’ve designed our sash windows to preserve the timeless appeal of traditional timber frames — without the upkeep. You’ll enjoy smooth operation, superior insulation, and advanced security features, all crafted to fit your property perfectly.
Features & Benefits
Here is the list of features and benefits:
- Authentic Georgian-style design for period charm
- A-rated glazing for warmth and noise reduction
- Smooth sliding operation — no sticking or rattling
- Secure, low-maintenance uPVC construction
- Wide choice of colours and finishes
Tilt-in function available for easy cleaning
Perfect for Heritage Homes
Our sash windows are ideal for listed-style homes or conservation areas, offering a genuine timber-look profile with the benefits of modern materials. You can choose traditional white, woodgrain, or bespoke colours to match your property’s character.
Built for Comfort & Confidence
Every sash window installation is carried out by our Certass-accredited team, and comes with:
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Customers Rate Us Highly
Explore recent installations from sash window upgrades to warm roof conversions and see how thoughtful design and careful fitting can transform your home.
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