Is a boxwelded or preformed pond liner suitable for me?
High-quality solutions for formal-shaped ponds
Box welds are prefabricated pond liners made to fit a pond’s exact dimensions. As they are created for specific shapes, preformed liners are best suited to square and rectangular ponds, but can also be used in circular designs. A popular choice for formal, ornamental, and koi ponds with vertical sides, these types of pond liners have welded seams that allow for easier cleaning, maintenance, and installation.
Unlike flat sheet liners, box welded pond liners are smooth and crease-free. This means that they are not only more visually appealing but they can also prevent waste and debris from entering a pond and affecting its water quality.
At Catalogue Engineering, we offer:
Pre-fabricated box welded pond liners, top hats, tapes, and textiles for every specification
Fully welded oversized panels for larger ponds
Preformed liners welded in a controlled environment
A full range of membrane options (LLDPE, HDPE, PP and more)
Geo-membranes from 0.4mm-2.0mm
Dispersal units in various sizes.
What we can provide for you
WHY CHOOSE US
Expertise
With years of experience and a team of experts in water and gas management, we have the knowledge and skills to tackle complex projects and deliver results
Client-Centric
Your success is our priority. We work closely with you to understand your needs, offering personalised
solutions and exceptional customer service
Sustainability
We understand the importance of responsible resource management. Our solutions are designed with a
focus on sustainability and environmental stewardship
Prefabricated panels and boxwelded liners for every requirement
BESPOKE POND LINING SUPPLIERS
We create high-quality boxwelds and preformed pond liners at our Northampton-based fabrication unit. Whether you need our help with a smaller design or an extra-large project, we’ll do what we can to accommodate your requirements.
From LLDPE and HDPE liners to designs in a range of other durable materials, our strong, watertight, and easy-to-install solutions are guaranteed to stand the test of time. Looking to save time and money when installing your pond? Find out more about bespoke boxwelded pond liners by getting in touch with our expert team today.
Water Management Services for Boxwelds & Prefabricated Panels
Custom-built, watertight geomembrane lining solutions designed to fit your exact site dimensions. From bespoke formal ponds to large-scale water retention basins, Catalogue Engineering provides factory-welded boxwelds and prefabricated panels that save time, reduce installation costs, and guarantee long-lasting performance across our entire range of water management solutions.
Bespoke Geomembrane Liners Made to Measure
When managing water on any construction, commercial, or residential project, choosing the right lining system is essential. Traditional flat sheet liners often require extensive folding, cutting, and on-site welding. On complex or formal shapes, this can leave unsightly creases, trap organic waste, and increase the risk of leaks over time. To learn more about how installation techniques differ, read our guide on why you should hire a professional contractor to install your pond liner.
Our specialised services focus on boxwelded liners and prefabricated panels. Manufactured at our Northamptonshire fabrication facility under strict quality controls, these pre-formed liners are tailormade to match the exact profile of your structure. Whether you need a 3D box weld for a vertical-walled formal pond or an oversized 2D panel for an attenuation lagoon, we deliver solutions that make installation fast, clean, and completely watertight.
Understanding Boxwelds and Prefabricated Panels
Depending on the shape and scale of your water management project, we offer two main types of pre-formed lining solutions:
1. Box Welded Liners (3D Pre-formed Liners)
A boxwelded liner is a three-dimensional geomembrane crafted to fit specific vertical or sloped shapes. Using thermal welding technology, flat membrane sheets are joined together in our workshop to form an exact shape, typically square, rectangular, L-shaped, or circular. Once delivered to your site, the liner drops straight into the excavated or built structure without needing folded corners or site-welded seams. For more details on standard lining, visit our pond liners service page.
2. Prefabricated Panels (Oversized Flat Sheets)
For larger open water features, golf course lake liners, or sustainable drainage systems (SuDS), welding individual rolls of membrane together on site can be slow and weather-dependent. Our prefabricated panels solve this issue. We join multiple membrane rolls together in our controlled factory environment into one single, large panel. These giant panels are folded, rolled, and shipped directly to your site, ready to unroll in minutes.
Our Complete Water Management Services
At Catalogue Engineering, we provide end-to-end support for ground contractors, landscape engineers, developers, and private clients. Our services include:
Bespoke Workshop Fabrication
Precision cutting and hot-wedge welding of geomembranes inside our climate-controlled UK fabrication unit to guarantee perfect seam integrity.
Full Turnkey Supply and Installation
Our experienced, qualified site teams can handle complete ground preparation, geotextile underlay fitting, panel deployment, and pipe penetration sealing. Learn step-by-step about our process in our article on the pond liner installation process.
Supply-Only Solutions for Self-Installs
If you prefer to manage the installation yourself, we supply custom boxwelds and panels delivered to site alongside clear instructions and necessary sealing accessories.
Pipe Connections & Accessory Supply
We manufacture custom pipe boots ("top hats"), puddle flanges, jointing tapes, mechanical batten strips, and protective geotextiles for a seamless, sealed system.
Testing & Quality Assurance
Every seam produced in our workshop undergoes rigorous quality checks to ensure total watertightness before shipment. Check out our past work in our water management case studies.
Why Choose Boxwelded Liners & Prefabricated Panels?
Investing in factory-prefabricated water management liners offers significant operational and economic advantages over traditional field-welded methods:
1. Crease-Free and Visually Clean
Because boxwelds fit the exact contours of your build, there are no loose folds or heavy pleats. This delivers a neat, professional finish for ornamental ponds and formal water features.
2. Cleaner Water and Easy Maintenance
In standard flat liners, folds and creases act as traps for silt, fish waste, and debris. Over time, decaying matter in these pockets degrades water quality and promotes unwanted algae growth. A smooth boxwelded surface is simple to pump out, sweep, or clean.
3. Superior Factory Seam Strength
Site welding can be compromised by dust, rain, wind, or cold temperatures. Our factory welds are produced under ideal conditions using automated heat machinery, ensuring uniform bond strength across every millimetre of the seam. Discover more technical insights in our ultimate guide to industrial pond liners.
4. Drastically Reduced On-Site Labour Time
Deploying a prefabricated panel or dropping in a boxwelded liner takes a fraction of the time needed to weld individual rolls on site. This keeps your project schedule on track and reduces site labour costs.
High-Grade Geomembrane Materials
We work with a wide range of premium membranes ranging from 0.4mm to 2.0mm in thickness, choosing the right polymer to suit your water storage requirements:
LLDPE (Linear Low-Density Polyethylene)
Exceptionally flexible and puncture-resistant, making it ideal for prefabricated panels and complex ground shapes.
HDPE (High-Density Polyethylene)
Highly durable with excellent chemical resistance, suitable for commercial attenuation and industrial water containment.
PP (Polypropylene)
Flexible, fish-friendly, and durable membrane widely favoured for long-term ornamental and agricultural water storage.
Protective Geotextiles
High-grade non-woven fleece underlays used to protect the membrane from sharp stones and ground movement.
Applications & Integrated Water Management Systems
Our custom water management liners are trusted across a variety of commercial and civil engineering sectors:
Formal & Koi Ponds
Vertical-walled timber, blockwork, or concrete ponds requiring a sleek, leak-free finish.
Golf Course Lakes & Water Features
Large-scale aesthetic water hazards requiring fast panel deployment.
Attenuation Tanks & SuDS Lagoons
Stormwater storage systems that integrate directly with attenuation and soakaway installations. Read our technical breakdown on attenuation tanks vs. soakaways for more information.
Permeable Surfaces
Often paired alongside permeable paving systems to manage surface runoff sustainably.
Blue & Green Roof Infrastructures
Prefabricated waterproofing membranes are vital components in modern eco-builds. Explore our guides on blue roofs and green roofs, or read about blue vs green roofs.
Contaminated Land Containment
When working on brownfield sites that require gas protection alongside water management, explore our gas and hydrocarbon barrier solutions.
Why Partner with Catalogue Engineering?
With years of hands-on experience in water management, gas containment, and ground engineering solutions, Catalogue Engineering combines technical know-how with exceptional customer support. You can read more about our certifications on our accreditations page or view our recent work across all sectors in our full case studies library.
Based in Northamptonshire, our skilled fabrication team takes your precise dimensions and turns them into durable, ready-to-fit liner systems. Whether you are a groundworks contractor needing an oversized prefabricated panel delivered to site next week or a private builder planning a custom koi pond, we deliver tailored solutions on time and within budget.
Discuss Your Project With Our Expert Team
Need assistance selecting the right material or calculating dimensions for a boxwelded liner? Get in touch with us through our contact page today to discuss your project requirements, request a free quotation, or arrange site assistance.
Call us: 0330 058 3335
Email: enquiries@catalogue.engineering
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Testimonials
Read what our clients have to say
I am pleased to recommend Catalogue Engineering for their exceptional installation of attenuation systems. Their adaptability to design changes, swift quotation process, and excellent communication ensure seamless project progress. Luke and his team stand out with a friendly and professional approach, combining technical expertise with a positive attitude. Their commitment to efficiency and collaboration has made them an invaluable partner, and we look forward to continuing successful projects together.
Another fine example of the outstanding works carried out by catalogue engineering , done with pride from radon membranes to attenuation tanks carried out on behalf of dtc construction over the least few years . Thanks to Ash / Luke and all involved.
Catalogue engineering are a great company, they carry out their works in a very professional, timely and efficient manner. I would highly recommend Catalogue Engineering for any water & gas management Solutions.
Thank you
Working with Jordan is a f***ing nightmare… nearly as bad as working with Luke….
Cherry Pipes has used Catalogue Engineering as an approved installer on their Attenuation offering for over 5 years. Their service and knowledge of the industry are second to none.
Catalogue Engineering are regularly employed to supply and install attenuation tank and gas membranes. Luke and Jordan are always on the end of the phone to ensure the install goes smoothly.
