OUR SERVICES
Green Roofs
Reduce stormwater runoff, improve building insulation, and extend the lifespan of your roof with our green roofing solutions. We design and install high-quality, sustainable green roofs throughout the UK, delivering nature-based drainage and insulation systems to clients all across the country.
Green roof design and installation
Quality sustainable roofing solutions
At Catalogue Engineering, we specialise in the design and installation of green roofs for commercial buildings of every description. We work with a range of market-leading manufacturers to create eco-friendly roofing solutions for various urban environments, supporting building owners to reduce flood risks, improve thermal performance, and enhance biodiversity.
Whether at rooftop or podium level, or as part of an underground structure, we can design and install a sustainable green roof to meet your requirements. We are happy to work with you at the early design stage or offer alternatives to your design at tender/OTP.
Get in touch with our team today to discuss your green roofing project.
Sustainable roofing systems
Trusted green roof installers
We are one of the UK’s most trusted suppliers of environmentally friendly commercial roofs and have designed and installed green roofs for hundreds of clients over the last few decades. The systems we install are highly functional and aesthetically pleasing, offering a wide range of practical, environmental, and mental health benefits.
What is a green roof?
A green roof, sometimes called a living roof, is a type of roof covered with vegetation and a growing medium. Installed over waterproof membranes, green roof systems minimise flooding by absorbing rainwater, enhance a building’s thermal performance, and improve local air quality. Beyond their environmental utility, they are widely recognised for their ability to increase a building’s visual appeal and provide positive mental health benefits for occupants.
At Catalogue Engineering, we:
Work with a range of manufacturers to provide a solution for your roof area
Advise on substrate and vegetation requirements.
Offer 3rd party validation
Supply high-quality sealed roof components for self-installation
Offer full UK coverage.
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
Eco-friendly roofing specialists
QUALITY INSTALLATIONS
Whatever type of green roof you’re searching for, you’ve come to the right place. We can install many different types of green roofing systems, including intensive green roofs (roof gardens) and extensive green roofs.
Contact us today for professional advice on all of your sustainable green roofing needs. Call us on 0330 058 3335 or fill out our enquiry form, and we’ll get back to you as soon as possible.
Green roofs are designed to absorb rainwater and alleviate its impact on local drainage systems. This is achieved by capturing rainwater at the source and using this to support the growth of the vegetation that sits on the roof’s top layer. Green roof plants will release some of this water back into the environment via a process known as transpiration, which also reduces air temperature. Any excess water collected by the roof either evaporates or is slowly released through an in-built drainage system.
In many cases, green living roofs can last between 40 to 50 years. The exact lifespan of a green roof depends on a variety of factors, including the quality of its materials and the plants and vegetation used. A green roof’s longevity will be further ensured if it is installed by qualified professionals and regularly inspected for maintenance issues.
Yes, green roofs are more expensive upfront than conventional roofs, mainly because they require additional materials and installation. However, they can reduce energy costs, extend roof lifespan, and provide environmental benefits, which may offset some costs over time.
Yes, but it depends on the type of green roof. Extensive green roofs are generally not designed for regular foot traffic and are intended only for occasional maintenance access. Intensive green roofs are built to be walked on and can function as usable rooftop garden spaces.
Green roofs reduce heat by absorbing sunlight with plants instead of reflecting it into the building, cooling the air through evapotranspiration, and adding insulation that limits heat transfer into the structure. Together, these effects keep buildings cooler and help reduce surrounding urban heat.
Yes, green roofs cool buildings by shading the roof surface, reducing heat absorption, and releasing moisture through evapotranspiration, thereby lowering roof temperatures and reducing the amount of heat entering the building.
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Comprehensive Green Roof Water Management Solutions in the UK
At Catalogue Engineering, we design, supply and install advanced green roof systems for commercial, industrial and residential developments across the UK. Living roofs do more than just look good. A green roof is a powerful, nature-based water management system engineered to protect buildings, cut surface water flood risks and restore habitats in urban areas.
We are water management specialists. By combining high-performance waterproofing membranes, drainage layers, engineered soils and tailored vegetation, we deliver sustainable living roofs built to perform for decades.
How Green Roofs Improve Urban Water Management
Heavy rainfall poses a constant threat to modern UK towns and cities. Concrete surfaces cannot absorb water. This leaves town drainage systems overwhelmed during heavy storms. Green roofs solve this problem directly at the source by capturing, filtering and storing rainwater right where it falls.
Preventing Urban Flooding
Flooding happens fast. When rain hits hard roofs, it rushes into gutters within seconds. A green roof stops this destructive cycle immediately. The soil substrate and plant roots act as a natural sponge, holding back bulk water volume and keeping local drainage networks running safely within capacity.
Stormwater Attenuation and Peak Flow Reduction
Instead of rainwater rushing straight into downpipes, our living roofs release water back into the drainage system at a slow, controlled rate. This attenuation process reduces peak runoff flow during severe weather events, preventing water backup around your building and easing pressure on public sewers or on-site attenuation tanks.
Natural Evapotranspiration
Plants naturally breathe out moisture. During dry weather, green roof vegetation releases stored water back into the atmosphere through transpiration, while standing water in the soil layer evaporates naturally. Extensive green roofs can absorb 70% to 80% of total annual rainfall, massively cutting the overall water volume leaving your site throughout the year.
Meeting UK SuDS Compliance Standards
Planning rules are changing. UK planning authorities now strictly demand Sustainable Drainage Systems (SuDS) on new developments. Installing a green roof helps developers meet tough council attenuation targets easily. This often saves considerable money on underground pipework, deep excavations or extra blue roof systems.
Our Green Roof Systems
We supply two core types of green roof installations across the UK. Every project is carefully tailored to match your building structural load limits, access requirements and maintenance preferences.
Extensive Green Roofs (Low Weight and Low Maintenance)
Extensive roofs use a thin soil profile, usually between 60mm and 120mm deep. They feature tough, low-growing plants like sedum, wildflowers and hardy grasses that thrive without constant care. Lightweight and economical, they are the ideal choice for large commercial warehouses, industrial units and residential developments where regular foot access is not needed. Learn more in our full guide on green roofs benefits, costs, and maintenance.
Extensive Roof Vegetation Options
We supply pre-grown sedum blankets, plug plants or self-seeding wildflower mixes.
Extensive Substrate Depth
These systems feature shallow, lightweight soil layers designed specifically for low load capacities.
Extensive Roof Maintenance Requirements
Only minimal care is required, usually consisting of just one or two inspection visits per year.
Extensive Primary Function
They provide immediate rainwater absorption, thermal insulation and passive biodiversity gains.
Intensive Green Roofs (Roof Gardens and Podium Decks)
Intensive green roofs act as full elevated parks. With deeper soil bases ranging from 150mm to over 1,000mm, these systems easily support lawns, heavy shrubs, hedges, trees and paved walkways. They transform unused roof decks into valuable recreational spaces for office workers, hospital patients and apartment residents. For a detailed comparison between system types, check our article on blue vs green roofs.
Intensive Roof Vegetation Options
We install full lawn turf, structural shrubs, hedges, small trees and ornamental flower beds.
Intensive Substrate Depth
These use medium to deep soil builds requiring higher structural building support.
Intensive Roof Maintenance Requirements
They require regular gardening upkeep, similar to maintaining a ground-level park.
Intensive Primary Function
They offer usable leisure space, maximum water storage capacity and stunning visual impact.
The Key Layers of a Successful Green Roof Installation
A green roof must protect the building underneath. To guarantee your structure remains completely watertight and healthy for up to 50 years, every system we fit relies on high-grade, multi-layered components engineered to work together seamlessly.
System Foundations and Protection
Every successful roof starts with a strong defence. We install heavy-duty root barriers and protective cushioning mats that shield the roof deck from physical wear, structural movements and root penetration.
Waterproofing Membrane and Root Barrier
This layer stops moisture entering the building structure and prevents plant roots from damaging the underlying waterproofing deck. We also design and install structural gas and hydrocarbon barriers for ground-level developments.
Protection Mat
This cushions the waterproofing layer against accidental punctures or mechanical damage during the construction phase.
Drainage, Storage and Filtration Layers
Water control requires balance. You need enough water retention to nourish plants during dry spells, but fast drainage during storms so the roof never gets waterlogged.
Drainage and Reservoir Board
This traps small pools of water to feed plant roots during hot summer spells, while allowing heavy storm surges to drain freely toward outlets.
Filter Fleece
This prevents fine soil particles and organic debris from being washed into drainage channels, eliminating costly clogs.
Soil and Vegetation Layers
The top layers give life to the roof. We use specialised, lightweight soils that feed plants without adding excessive weight to the roof frame.
Engineered Substrate
We use nutrient-balanced, lightweight soil blends formulated to drain quickly and resist compaction over time.
Vegetation Layer
We plant specially selected sedum species, wildflowers or turf varieties grown to withstand harsh British weather conditions.
The Additional Benefits of Living Roofs
Living roofs deliver value every single day. Beyond surface water management, green roofs offer long-term financial, operational and environmental returns for property owners.
Protecting Roof Infrastructure
Bare flat roof membranes wear out fast. Constant sun, frost and wind degrade materials quickly. A green roof shields the structure underneath, effectively doubling or tripling its natural working lifespan to 40 or 50 years.
Extended Roof Lifespan
Living roofs shield underlying waterproof membranes from destructive UV light and extreme temperature changes, reducing repair costs significantly.
Improving Energy Efficiency
Energy costs keep rising. Green roof layers act as natural insulation, keeping indoor spaces significantly cooler throughout summer heatwaves while trapping valuable heat inside during cold winter months.
Building Thermal Insulation and Energy Savings
They cut down building energy bills year-round by lowering demand on heating and air conditioning systems.
Restoring Local Environments
Urban growth strips away natural habitats, leaving local wildlife displaced. Installing a living roof gives space back to nature, bringing insects, birds and pollinators right back into the heart of our cities.
Enhanced Biodiversity in Built Environments
Green roofs replace lost green footprints by creating thriving micro-habitats for wild birds, bees, butterflies and beneficial insects.
Noise Reduction
Dense soil layers and soft plant leaves absorb sound waves, creating a quiet, peaceful indoor environment by blocking out road noise, heavy rainfall and aircraft.
Why Choose Catalogue Engineering?
We know containment inside out. Catalogue Engineering brings decades of specialist expertise in water management, gas protection and sustainable civil engineering to every site. Take a look at our completed projects across our water management case studies page.
Full Project Support
From early concept drawings to final handover, our team handles every step with total precision and professionalism.
End-to-End Capability
We assist with initial site calculations, detailed design specifications, material procurement, site installation and sign-off.
Unbiased System Selection
We are independent installers. We work directly with top UK green roof manufacturers to find the exact system that fits your site requirements and budget best.
Independent Supplier Choice
Our independence provides complete freedom to select the most efficient, durable and cost-effective materials for your project.
Guaranteed Quality Standards
We never cut corners. Our installations undergo rigorous testing to ensure your roof performs flawlessly under extreme weather conditions.
Strict Quality Control
We maintain top industry accreditations. Check our accreditations page to view our full quality certifications.
Nationwide Operational Reach
Our installation teams operate across the UK, bringing expert technical service straight to your site wherever you are based.
Full UK Coverage
We have experienced mobile installation crews ready to deliver projects smoothly across England, Scotland and Wales.
Talk to Our Green Roof Experts Today
Need advice on an upcoming build? Whether you want a simple sedum roof, a high-capacity green-blue solution for SuDS compliance or an accessible podium deck garden, Catalogue Engineering is ready to help.
Get in touch with us today. Contact us now to request a detailed quotation, discuss site plans or schedule a technical consultation with our team.
Call us: 0330 058 3335
Email us: enquiries@catalogue.engineering
About Catalogue Engineering
Catalogue Engineering is a leading UK specialist in water management and gas barrier systems. Based in Northampton, we provide expert design and installation for commercial developments across the country. Our team delivers innovative solutions including SuDS compliant blue and green roofs, attenuation tanks and hydrocarbon protection. We pride ourselves on engineering excellence and a reliable service for every project.
Our Accreditations and Standards
Safety and quality underpin everything we do. Our team holds multiple industry qualifications, including TWI certifications and NVQ Level 2 credentials in gas membrane installations. We are also proud to be a British Safety Council accredited team, ensuring that every installation meets the highest regulatory standards for your site.
Start Your Next Project
Ready to upgrade your site with a smarter, greener roof? Let us discuss your project goals today.
Call our technical team on 0330 058 3335 or email enquiries@catalogue.engineering
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.
