Optigreen
Innovative green roof systems and solutions from a trusted supplier
About
About Optigrun
Optigrun is a leading supplier within the green roof industry, with over 50 years of market experience. The company offers a high-quality range of systems and solutions, alongside expert, project-specific technical advice. Clients are supported at every stage, from initial consultation and planning through to installation and ongoing maintenance.
In addition to systems for traditional green roof build-ups, Optigrun offers a comprehensive range of specialised solutions designed to meet more complex and evolving project requirements.
This includes integrated biosolar systems, which combine green roof technology with photovoltaic installations to enhance both ecological performance and energy generation. Optigrun also provides blue roof solutions, engineered to manage and attenuate rainwater effectively, supporting sustainable urban drainage strategies and reducing the risk of flooding.
For projects involving sloped structures, dedicated pitched roof systems are available, designed to ensure stability, drainage performance and long-term durability while maintaining the benefits of a vegetated roof.
Together, these advanced systems enable greater design flexibility, allowing architects and developers to deliver multifunctional roofing solutions that respond to environmental, technical and regulatory demands.
Ecological Compensation
Optigrun systems make a valuable contribution to climate mitigation. Recognised as an effective measure within environmental compensation regulations, green roofs create new habitats for people, plants and wildlife.
These systems are widely recognised within environmental planning frameworks as a practical solution for ecological compensation, helping developments meet biodiversity net gain and sustainability targets. By creating habitats for a variety of plant species, insects and birdlife, green roofs actively contribute to the restoration of urban ecosystems.
In addition to their ecological value, their ability to retain and attenuate rainwater is a key performance benefit. By temporarily storing precipitation and releasing it gradually through evapotranspiration, green roofs significantly reduce peak runoff rates. This helps to alleviate pressure on drainage infrastructure and lowers the risk of surface water flooding during intense rainfall events.
Multifunctional Roof Design
A green roof enhances any building, both aesthetically and functionally, while delivering measurable cost benefits. Selecting the most appropriate system requires careful consideration of project-specific requirements to ensure optimal performance.
Optigrun is driven by a commitment to improving built environments, advancing sustainable design and maintaining technological leadership. Its innovative systems are engineered to deliver outstanding results from both ecological and economic perspectives.
Innovative Technology
Optigrun develops pioneering systems built on decades of expertise and continuous innovation.
Whether for cost-effective, low-maintenance extensive green roofs or more complex, garden-style intensive roof landscapes, Optigrun provides tailored solutions to suit any application. This is supported by exceptional product quality, advanced technology and comprehensive consultancy services.
Every component is carefully designed and integrated to form a complete system, ensuring maximum benefit for clients, partners and the environment.
Advice, Service and Expertise
Optigrun work closely with architects, specifiers and contractors, offering guidance on all technical aspects of roof greening and cost efficiency.
Early-stage involvement allows potential challenges to be identified and addressed before they impact design or construction. The team provides detailed guidance on system selection, build-up specifications, load considerations and compliance with relevant regulations and standards.
Technical support extends to the preparation of project documentation, including NBS specifications, and performance calculations. These may cover wind uplift resistance, drainage performance, water retention capacity and system stability, all tailored to the specific building design and location.
Groups
- Supplier
- Green Roof Systems
- Product Suppliers
- Biosolar
- Blue Roof Systems
- Substrates and Aggregates
- Pedestals / Paving
Gallery
Services
Supplier of Green, Blue and Biosolar Roof Systems
The long-term and permanent functionality of green roofs depends upon multiple factors. Reliable and established products that comply with the guidelines of green roofing are important.
Optigrun supply all the products needed to create a successful system including, protection and filter fleeces, drainage boards, inspection chambers, substrates and vegetation.
CPD Opportunities
We understand the importance of keeping industry knowledge up to date. At Optigrun we want to use our years of expertise to help improve your understanding of the green roof market. We offer a number of face to face and online learning opportunities to cater for all your needs, and if there is something we don’t cover, then just ask and we will be happy to assist.
We currently offer 3 CPD sessions:
- Green Roofs in Practice
- Achieving a Biosolar Specification
- Understanding Blue Roofs : From design to application
Products
OPTIGRUN SEDUM GREEN ROOF
A sedum roof is a relatively low-cost option using a minimum 20mm depth drainage and reservoir board and 60mm depth extensive substrate if using a pre-cultivated vegetation mat or 80mm depth substrate if using plug planted vegetation.
The vegetation will be alpines and sedums which are very robust and drought tolerant, but which will provide a low biodiversity level.
It has a low maintenance requirement, typically twice yearly.
OPTIGRUN BIOSOLAR ROOF
With this system the solar panel supports are secured by the superimposed load of the green roof build up. There are no fixings through the roof surface.
The solar supports are specially designed with a profiled base plate that works on the same principle as a typical drainage and reservoir board.
This solution allows vegetation to grow under the PV panels as well as around them so maximising the green roof area.
Suitable for sedum or wildflower vegetation the plants themselves will naturalise and shade loving species will thrive under the panels themselves.
The solution can be used where panel inclinations of between 10 and 20 degrees are required. Each project will require a layout to be prepared alongside a wind loading calculation to ensure that the dry weight of the green roof build up will be sufficient as ballast for the supports
An additional benefit of a solar green roof is that the local cooling effect of a green roof can increase the output of PV panels by up to 5% during hotter weather as it maintains a more ideal operating temperature for the panels
OPTIGRUN WATER RETENTION (BLUE) ROOF
Referred to as a “blue roof”.
Works by replacing the normal drainage and reservoir board with a retention board, often referred to as a storage void.
This storage facility will work in conjunction with a restricted or adjustable outlet arrangement. The whole arrangement will be optimised for each individual project and will generally provide temporary and permanent water storage.
The temporary storage will typically drain away over 24 hours, the permanent water stored will be used by the vegetation
OPTIGRUN PITCHED GREEN ROOF
It is possible to install green roofs on pitched, curved or waveform roofs as long as they are continuously waterproofed and have a flat and level roof surface. The pitch can be as much as 45 degrees.
The right solution will depend on the following-:
• Roof configuration (i.e. mono pitch, duo pitch, curved hips, valleys)
• Roof pitch
• Length of slope/s
• Perimeter detailing
• Proposed vegetation