Secondary Glazing For Horizontal Windows
Horizontal secondary glazing is a slim internal window system for casement windows, sliding windows and wide openings. If you’re living in a property that doesn’t allow for a complete window replacement, secondary glazing adds an extra layer of insulation without replacing your existing windows, creating a safer, more comfortable living space.

Unlike vertical windows, horizontal secondary glazing slides left or right, making it a practical choice for wider windows and patio doors. It allows for easy operation, controlled ventilation and full access to the original window for cleaning and maintenance.
This secondary glazing is ideal for homes, offices and listed buildings where upgrading thermal performance and soundproofing is needed without altering the unique look of the property.
Looking for reliable secondary glazing suppliers? Get in touch today on 0208 504 9980 for a free consultation.
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Key Features of Horizontal Secondary Glazing
✓ Ideal for wide casement windows and sliding doors
✓ Reduces external noise by up to 80% (up to 54dB)
✓ Improves insulation and reduces heat loss by up to 65%
✓ Enhances home safety with an additional glazing barrier
✓ Smooth sliding panels for easy operation
✓ Slim and lightweight design
✓ Custom glass options, including acoustic and toughened glass
✓ Low-maintenance and easy to clean
Why Choose Us as Your Secondary Glazing Supplier?
Choosing the right secondary glazing supplier is key to getting a high-quality, long-lasting solution. Here’s why customers trust Misty Glaze for glazing in Essex and London:
1. Experienced Specialists
We have years of expertise in double glazing replacements and secondary glazing, ensuring every installation is carried out with maximum precision and care.
2. Made-to-Measure Solutions
Our secondary glazing for horizontal windows is custom-built to fit any size or shape, enhancing performance without compromising the look of your property.
3. Hassle-Free Installation
Our glaziers work efficiently and cleanly, making sure to minimise disruption while delivering a professional finish.
4. Bespoke to Your Needs
We offer a range of glass types, frame finishes and sliding options, so you get a bespoke glazing solution that works best for your windows.
5. Trusted by London & Essex Homeowners & Businesses
We’ve built a reputation for quality work, reliable service and excellent customer feedback.
6. Transparent Pricing & Honest Advice
No hidden costs. Just clear, competitive pricing and expert recommendations.
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Improve insulation, cut noise and enjoy better security with horizontal window glazing. A fantastic choice for casement windows and sliding doors, our bespoke secondary glazing offers a sleek, practical way to upgrade your space.
Ready to get started? Get in touch with us online for expert advice and a FREE quote.
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