Pond Glass
UK Supplier of Bespoke Pond Glass & Pond Glass Windows
Fusion Glass Ltd supplies bespoke pond glass manufactured for structural performance, safety and durability. Whether for a koi pond, raised pond or decorative water feature, we produce toughened and laminated glass panels, including heat-soaked options where required, cut to the correct thickness for your pond’s depth and water pressure to ensure strength and long-term reliability.
For truly stunning Koi Pond Glass – including both Viewing Windows and Jump Guards – explore our premium range. We take pride in offering industry-leading quality at some of the most competitive prices available.
Fast & fast delivery
Best price guarateed
UKs leading supplier
Buy pond glass today!
We stock a range of common sizes in our store, but can supply any size of pond glass that you need. For bespoke orders, custom glass specifications, please get in touch via phone, email or the contact form.
Pond Glass Viewing window Thickness guide
Pond Viewing Windows
At Fusion Glass, we offer high-quality pond viewing windows in standard sizes: 21.5mm, 25.5mm, 33mm, and 39mm. Need a custom size? We can create bespoke glass panels to suit your exact requirements, just get in touch.
All our glass is Toughened, laminated, and heat-soaked, ensuring maximum strength and durability. Each panel comes with polished edges and dubbed corners for a flawless finish.
Upgrade your pond with the best viewing windows in the UK! Fusion Glass is responsible for ensuring the quality and safe delivery of every pond viewing window. Contact us today.
Koi Pond Jump Guard
At Fusion Glass Ltd, we offer a premium range of Koi Pond Jump Guards, designed to provide a secure barrier while maintaining the beauty of your pond.
- High-Quality Toughened Glass – Manufactured from 10mm toughened glass, ensuring durability and longevity. Each panel features polished edges with the option of dubbed or curved corners for added safety and a refined appearance.
Multiple Size Options
We provide a variety of standard sizes available on our website. For unique pond designs, we also offer bespoke sizing to perfectly fit your needs.
Secure & Reliable Installation
Our range of jump guard posts, base clamps, and glass-to-glass clamps ensures a strong and stable structure, giving you peace of mind without compromising on aesthetics.
What Type of Glass Is Used for Pond Glass Windows?
Pond glass windows are typically manufactured from toughened laminated glass rather than single toughened glass.
Toughened laminated glass provides:
• Extra strength
• Improved safety under load
• Greater durability
• Resistance to crack propagation
• Long-term structural integrity
Where specified, heat-soaked glass can be supplied to reduce the risk of spontaneous defects. This is particularly important for thicker laminated units used in deeper ponds.
Each panel is manufactured to withstand water pressure at the specified depth. We do not recommend standard window glass or non-structural glazing for pond installations.
For alternative structural glazing applications beyond pond installations, visit our custom glass panels section.
All glass is quality-inspected prior to dispatch to ensure consistency, finish accuracy, and compliance with relevant glazing standards.
Pond Viewing Window Thickness Guide
There is no universal thickness guide for pond viewing windows.
The correct glass thickness depends on several key factors:
What determines the required thickness?
• Depth of water
• Overall span of the pond window
• Support conditions
• Whether the panel is supported on all four edges
• Installation method
Why thickness matters
As depth increases, water pressure increases proportionally. Thicker laminated units are typically required for deeper ponds to minimise deflection and maintain clear visibility without distortion.
Using glass that is too thin can lead to movement, stress fractures, chips or cracks over time. Over-specifying thickness can increase cost unnecessarily.
We assess each request individually to ensure the correct thickness is achieved for structural safety and long-term performance.
Pond Viewing Window Thickness Comparison
Typical maximum recommendations. All figures assume correct installation into a suitable structural rebate with full edge support.
21.5mm
Max Depth: Up to 400mm (16")
Max Width: Up to 1600mm (63")
Best for: Shallow garden ponds, sleeper ponds, decorative or wildlife ponds
25.5mm
Max Depth: Up to 600mm (24")
Max Width: Up to 2000mm (79")
Best for: Medium-depth ponds, koi ponds, raised sleeper ponds
33mm
Max Depth: Up to 1000mm (39")
Max Width: Up to 2000mm (79")
Best for: Deep koi ponds, large raised ponds and projects requiring increased strength
39mm
Max Depth: Up to 1000mm (39")
Max Width: Up to 3000mm (118")
Best for: Very wide viewing panels, deep ponds and high-end or showcase installations
44.5mm
Max Depth: Up to 1200mm (47")
Max Width: Up to 3500mm (138")
Best for: Large, deep water features and specialist or commercial pond installations
Important Notes
• Sizes shown are indicative and depend on panel proportions and installation method
• All pond viewing windows should be toughened, laminated and heat soaked
• Final thickness selection should always be confirmed before manufacture
Available Thickness Options
• 21.5mm pond viewing window
• 25.5mm pond viewing window
• 33mm pond viewing window
• 39mm pond viewing window
If you are unsure which specification is suitable, we recommend contacting our team before placing your order.
How to Install a Pond Viewing Window – Quick Guide from Fusion Glass Ltd.
Brickwork Rebate Method
This method creates a 45mm-wide rebate into your brick or sleeper structure on the pond’s interior. This matches the pond glass thickness and is pressed into the water pressure when the pond is filled, holding it firmly in place.
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Preparation: Cut the brick or sleepers before laying, allowing an extra 5mm in height for packing.
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Rebate Size: Make the recess 6 -10mm larger than your glass, leaving a 3 - 5mm gap filled with silicone.
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Fitting: Use packers to level the glass, then seal with silicone. Then finish with a smooth render for a polished look.
After installation, you need to wait at least 24 - 48 hours to allow the sealant to cure fully before filling the pond with water and using.
Bird’s Eye View Diagram:
Below is a visual guide illustrating the rebate setup and the placement of adhesive sealant to ensure a watertight fit.
Alternative Installation Options
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Liner Method: Overlap the liner by 40mm around the glass, then silicone and cure for a secure fit.
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Fibreglass Frame: Fix a fibreglass frame into a drilled hole, render, and silicon the glass into the frame for a sleek, professional look.
Need Help with Your Pond Glass Setup?
For installation advice or premium pond glass, contact Fusion Glass Ltd. today. We’re here to help make your water feature a stunning focal point!
How to Fit a Pond Viewing Window
At Fusion Glass, we specialise in the reliable delivery of high-quality pond glass for all your pond and water feature projects. We use our own vehicles to deliver pond glass directly to your property, ensuring safe handling and proper setup.
Whether you’re creating a natural pond or a decorative water feature, our goal is to ensure a smooth, hassle-free process from order to delivery. Here’s everything you need to know about our lead times, delivery policies, and order accuracy:
Pond Glass as a Garden Feature
A well-designed pond glass window can enhance the elegance, beauty and overall impact of any garden. Whether creating a contemporary raised pond or incorporating a viewing window into custom pond designs, structural glass provides unmatched clarity and a sleek architectural finish.
Clear laminated panels allow koi fish to be seen in detail, creating a fantastic visual feature while maintaining structural safety and stability.
When correctly specified and professionally installed, pond glass can achieve excellent longevity, maintain clarity and resist algae staining better than lower-quality alternatives.
Delivery, Lead Times & UK Supply
All pond glass is manufactured in the UK and supplied nationwide.
Lead times vary depending on thickness, size and production schedule. We aim to provide reliable delivery and clear communication throughout the process.
Important notes for delivery:
• Ensure adequate manpower is available
• Check access routes prior to delivery day
• Inspect packaging before signing
• Report any visible defects immediately
For full company terms, please see our Terms & Conditions.
How to Maintain a Clear Pond Viewing Window
A pond viewing window offers a stunning underwater view of koi, aquatic plants, and water features. Regular cleaning is essential to prevent algae buildup and keep your pond looking its best all year round. Over time, algae naturally forms on pond glass, but with consistent maintenance, you can enjoy a clear, unobstructed view.
How Often to Clean Your Pond Glass
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When algae is visible: Clean early for easier removal.
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Weekly: Recommended for koi ponds with regular viewing.
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Seasonally: Increase cleaning frequency during warm months when algae grows faster.
Best Tools for Cleaning Pond Glass
Avoid scratching your pond glass by using soft, pond-safe tools:
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Shallow ponds: Microfibre cloths, soft sponges, Japanese matting.
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Deeper ponds: Telescopic brushes, pond-safe cleaning tools, or DIY options like a dish brush on a pipe.
Tips for Keeping Your Pond View Clear
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Clean regularly and lightly.
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Use circular motions for an even finish.
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Check water nutrient levels (nitrates, phosphates).
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Limit direct sunlight to slow algae growth.
Keep Your Pond View Pristine
Regular, gentle cleaning with the right tools will help you enjoy a clear, beautiful underwater view. Maintain your pond glass for a stunning aquatic display all year round.
For more information on this, check out our blog - How to Clean a Pond Window: Keep Your Koi Pond Glass Crystal Clear
Why Choose Fusion Glass?
We are committed to providing top-quality pond glass suitable for water features, decorative ponds, and custom pond designs. Please review our terms carefully before placing your order.
Contact our expert team today for advice and reliable delivery services for your pond glass project!