33mm Pond Viewing Window – Toughened & Laminated Pond Glass UK
A 33mm pond viewing window is designed for deeper ponds and larger viewing panels, where higher water pressure and structural performance are critical. It is commonly specified for koi ponds, raised concrete ponds, and projects requiring increased strength and reduced deflection.
At Fusion Glass Ltd, we supply 33mm toughened laminated pond glass cut to size, with polished edges and reliable UK-wide delivery.
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What Is a 33mm Pond Viewing Window?
33mm pond glass is manufactured using multiple layers of toughened safety glass laminated together with high-strength interlayers, creating a rigid and robust panel capable of withstanding significant hydrostatic pressure.
This construction provides enhanced structural performance compared with thinner options, making 33mm glass suitable for demanding pond installations where safety margins are critical.
The laminated build also offers improved safety, helping to maintain panel integrity in the unlikely event of damage.
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 Viewing Window Thickness Comparison
Typical maximum recommendations. All figures assume correct installation into a suitable structural rebate with full edge support.
21.5mm
Max panel depth: Up to 400mm (16 inches)
Max panel width: Up to 1600mm (63 inches)
Best suited for: Shallow garden ponds, sleeper ponds, decorative or wildlife ponds
25.5mm
Max panel depth: Up to 600mm (24 inches)
Max panel width: Up to 2000mm (79 inches)
Best suited for: Medium-depth ponds, koi ponds, raised sleeper ponds
33mm
Max panel depth: Up to 1000mm (39 inches)
Max panel width: Up to 2000mm (79 inches)
Best suited for: Deep koi ponds, large raised ponds and projects requiring increased strength
39mm
Max panel depth: Up to 1000mm (39 inches)
Max panel width: Up to 3000mm (118 inches)
Best suited for: Very wide viewing panels, deep ponds and high-end or showcase installations
44.5mm
Max panel depth: Up to 1200mm (47 inches)
Max panel width: Up to 3500mm (138 inches)
Best suited 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.
A 33mm pond viewing window is typically chosen when pond depth, panel size, or design complexity exceeds the limits of mid-range glass thicknesses.
It is well suited to:
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Deep koi ponds
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Large raised ponds
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Concrete or block-built pond structures
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Projects where reduced glass deflection is important
For smaller or shallower ponds, 25.5mm pond glass may be sufficient, while very wide panels may require 39mm glass.
Recommended Panel Sizes
The performance of 33mm pond glass depends on panel depth, panel width, and installation method.
Typical recommendations for 33mm pond viewing windows are:
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Maximum panel depth: up to 1000mm (39 inches)
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Maximum panel width: around 2000mm (79 inches)
These guidelines assume installation into a structurally sound rebate with full edge support on all sides.
33mm Compared With Other Pond Glass Thicknesses
Compared with 25.5mm pond viewing window glass, 33mm provides significantly greater resistance to water pressure and reduced deflection in deeper ponds.
Compared with 39mm pond viewing window glass, 33mm is often selected where panel widths are more modest but depth remains substantial.
Selecting the correct thickness is essential to ensure safety, durability, and performance over time.
All 33mm pond viewing windows supplied by Fusion Glass Ltd are manufactured to a high safety specification and supplied as:
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Toughened
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Laminated
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Heat soaked
Edges are fully polished for safety and appearance, with dubbed corners supplied as standard to minimise stress concentrations.
This specification ensures long-term reliability when the glass is installed correctly.
Pond Glass Delivery & Lead Times
Fusion Glass Ltd supplies 33mm pond viewing windows across the UK, providing reliable nationwide delivery for domestic and trade customers.
Typical lead times are approximately 10–15 working days from order confirmation. During busy periods, lead times may extend, so we recommend ordering well in advance to suit your project timeline.
Once your glass is ready, we will contact you to confirm delivery scheduling.
Delivery Times, Access & Offloading
Deliveries are made Monday to Friday between 07:30 and 17:30. Please ensure someone is available on the delivery day, and ideally the following day, to receive the glass.
All pond glass is delivered kerbside only. Suitable access must be available for the delivery vehicle.
Due to the weight of glass panels, at least two people are required for every 85kg of glass to safely offload. Glass is delivered unwrapped, and customers are responsible for safe handling once offloaded.
Delivery Areas & Additional Charges
We offer nationwide delivery across the UK. Additional delivery charges may apply for the following postcode areas:
AB, BT, CT, DD, DG, EH, FK, G, IV, KA, KW, KY, ML, PA, PH, PL, TD, TN23–TN30, TR
If your delivery address falls within one of these postcode areas, please contact us before ordering so delivery costs can be confirmed.
Inspection on Delivery
All pond glass must be checked immediately upon delivery before signing. Any damaged or defective glass must be reported and rejected at the time of delivery.
Order Accuracy & Amendments
Please ensure all sizes, thicknesses, and specifications are correct before confirming your order.
Cancellations or changes can be made within 48 hours of placing your order. After this period, the glass will be cut to size and no changes or refunds can be accepted.
Frequently Asked Questions – 25.5mm Pond Glass
Is 33mm pond glass suitable for deep koi ponds?
Yes, 33mm is commonly specified for deep koi ponds where increased water pressure and reduced deflection are required.
Can 33mm glass be used in raised concrete ponds?
Yes, it is well suited to concrete and block-built pond structures with proper rebates and support.
Do you supply 33mm pond glass cut to size?
Yes, all 33mm pond viewing windows are supplied cut to your required dimensions.
Fusion Glass Ltd is a UK specialist supplier of pond viewing windows, supplying glass cut to size for bespoke pond projects.
We provide clear technical guidance to help ensure the correct thickness is selected for your design.
Nationwide delivery is available on all pond glass products.
Get a Quote for a 33mm Pond Viewing Window
If you’re planning a deeper pond and believe 33mm pond glass is suitable for your project, get in touch with us today.
Please provide your required glass size, pond depth, and construction method so we can confirm suitability.
We’ll provide a clear, no-obligation quotation.