Green roof systems
Green roofs, or living roofs, are partly or completely covered with vegetation, planted in a growing medium, and installed over a waterproofing membrane. They may also include additional layers such as a root barrier, a drainage layer, water storage and irrigation systems. They can contribute to BREEAM credits or help a development achieve planning permission. Green roofs can help to:
- promote biodiversity
- combat the urban heat islands effect
- absorb CO2
- reduce heat loss
- provide acoustic or thermal insulation
- help with sustainable drainage schemes
- provide recreational space
Green roof systems fall into five main types: Extensive green roofs, Intensive green roofs, Semi-intensive green roofs, Biodiverse roofs and Brown roofs.
Green roof sedum fertiliser
Harrowden's specially formulated Sedum Fertiliser, designed for living roofs, has a completely new formula that covers 65m2. Sedum Fertiliser is an essential part of their recommended green roof maintenance regime. Harrowden Sedum Fertiliser is a slow-release organic feed formulated for healthy and robust plants. This maximises benefits for any...Harrowden- PRODUCT
Green Roof Substrate
A green roof is a unique environment that calls for a unique growing medium. With almost 2 decades of growing sedum and wildflower blankets for use on extensive green roofs, Turfonline have perfected a growing medium that meets the needs of both the building and the plants. Our specially blended extensive green roof substrate is tested to the...Harrowden- PRODUCT
Extensive Green Roof Substrate
A blend of 10mm graded PAS 100 Compost blended with 8-14mm expanded clay lightweight aggregate and mulched wood fines. A substrate with a thickness of between 5-14cm, this blend is suitable for low maintenance extensive green roof applications, and sedum planting due to its relatively low organic content, high porosity, and good particle...MCM-SE- PRODUCT
Grassroof GFR/2 green roof system
The Grassroof green roof system combines the functions of paving and a drainage layer. LS/1 leg supports are simply bonded to the roof membrane to create a gap at the underside of the paver. With the GRF/2 system, a bonded geotextile on the underside of each unit creates a microporous barrier that holds the soil in place but allows water to...Grass Concrete- PRODUCT
Enviromat® Sedum Turf for green roofs
Enviromat® sedum matting is used for extensive green roofs, as well as being well-suited as a low-maintenance ground cover. The overall appearance of an Enviromat® sedum green roof is well manicured, neat and contemporary. Grown on a special matting for strength, versatility and easy installation, Enviromat® is supplied with 95% coverage of mature...Harrowden- PRODUCT
Wildflower green roof for cycle shed
As nearby parking spaces are few and far between, staff are encouraged to cycle to work at the Boathouse in Teddington. Landscape architects Outerspace therefore required a cycle store. This was designed to incorporate a green roof which would feature wild flowers. The clients chose Meadowmat woodland shade as the site was too shady for sedum matting or...Harrowden- PROJECT
Green roof creates interest for nursery children
Little Jungle Nursery in SE London has strong environmental and ecological ideals and wished to bring plants, pollinators and other wildlife into its environment. A green roof was installed on a small storage shed at the front of the nursery that children could see from the window and could watch flowers develop and see insects at work...Harrowden- PROJECT
Living green roof for historic windmill home
Harrowden supplied its premium grade turf for the green roof on an extension to a 300-year-old windmill as part of a home renovation. A grass mound was excavated to make room for this semi-submerged extension with grass roof. Visually, the project has barely had an impact on the building yet the living space has more than doubled...Harrowden- PROJECT
Lightweight aluminium green roof edging
Lightweight aluminium green roof edging is available in two face heights to suit Harrowden Turf's range of living roof products. 33 laser-cut slots per metre allow the free draining of water, whilst retaining pebbles or substrate. The base on both versions is 100mm wide allowing the weight of the green roof system or pebbles to hold it in place...Harrowden- PRODUCT
20mm HDPE drainage board for green roofs
Harrowden offers a tough cuspate drainage board with integral filter fleece that is ideal for intensive and semi-intensive green roofs, providing irrigation and drainage. A 20mm Black HDPE (high-density polyethylene) punched cuspate drainage board with a geotextile filter fleece bonded to a single side (top). The 20mm cuspate provides water...Harrowden- PRODUCT
ASF green roof single cycle shelter
ASF green roof cycle shelters use a roof tray and sedum matting to convert the usually utilitarian product of a cycle shelter into an attractive unit that promotes biodiversity. The frame and tray of the cycle shelters are manufactured in 275 carbon steel from recycled sources. As standard they are finished galvanised and powder coated in holybush...Architectural Street Furnishings- PRODUCT
ASF green roof double cycle shelter
ASF green roof cycle shelters use sedum matting to convert the utility product of a cycle shelter into a pleasing and architectural unit that promotes biodiversity: frames and trays are manufactured in 275 carbon steel from recycled sources; supplied with GT4 extensive roof garden substrate and roofdrain membrane - pre-grown sedum matting is...Architectural Street Furnishings- PRODUCT
Green Roof - Alumasc Roofing - East Beach Cafe
East Beach Café, Shoebury, Southend on Sea – Client was Southend on Sea Borough Council. The waterproofing was handled by Tower Roofing with Pritchard & Pritchard installing the green roof element. The location of the site was tricky, coastal with sea breezes and saltwater spray. Harrowden advised and assisted in the design of the Sedum Extensive...Harrowden- PROJECT
DELTA® Terraxx green roof drainage membrane
DELTA® Terrax is a dimpled sheet with a geotextile layer which acts as a surface layer. Normally used as a green roof external drainage layer, it also protects the primary waterproofing applied to substrate. Laminated on to the dimpled sheet, a layer of compression-resistant permanent filtration geotextile prevents the dimple structure from being...Delta Membrane Systems- PRODUCT
Grassroof GFR/1 green roof system - standard unit
The Grassroof green roof system combines the functions of paving and a drainage layer. LS/1 leg supports are simply bonded to the roof membrane to create a gap at the underside of the paver. With the GRF/1 system, this gap is filled in with a lightweight aggregate filter media...Grass Concrete- PRODUCT
Enviromat Sedum Green Roof Kit for pitched roofs
This is a simple green roof kit that can be installed in a day. It comprises a root barrier, water retention blanket and sedum matting. Enviromat pitched green roof kit is suitable for living green roofs with a gentle slope between 3 and 20 degrees. If the roof has a steeper or shallower pitch, Harrowden Turf provides advice on specification. The...Harrowden- PRODUCT
Intensive lightweight roof garden substrate
MCM's blended intensive lightweight roof garden substrate is a low-porosity, easy-draining product that is also suitable for podium landscaping. Thanks to a higher level of organic matter, lower porosity, and particle size, this roof garden topsoil suits the healthy well-drained establishment of an intensive or semi-intensive green roof planting...MCM-SE- PRODUCT
Timber-framed green roof shelter for conservation group
Handspring Design created a timber-framed green roof shelter for The Conservation Volunteers base at Hollybush Farm in Leeds. The shelter was designed to fit into a tight courtyard space, and was constructed using a Douglas Fir frame with traditional timber framing joinery including mortise and tenons, scarf joints and braces, all draw doweled...Handspring Design- PROJECT
Enclosed shelters with green roofs for Fujifilm offices
Langley Design worked with Willmott Dixon on a £43m state-of-the-art 3-storey office block expansion project for Fujifilm in Billingham. A large timber enclosed cycle shelter, bin store and smoking shelter were supplied with sedum roofs...Langley Design Street Furniture- PROJECT
Green roof cycle shelters and benches - housing project
Langley Design worked with WeBlack Ltd on the William Morris Close housing project in Oxford to manufacture and install a number of timber enclosed green roof cycle shelters and hardwood benches. The sedum roofs on the cycle shelters help the structures blend into the landscape and offset some of the carbon footprint created by the site, with the...Langley Design Street Furniture- PROJECT
Onion shelter with green roof for community garden
Churchhill Gardens, Boscombe is a very well used park, with its own community engagement facilitator. It is part of the Aspire project – a pan-European health and wellbeing initative - and C3 Collaborating for Health. A large Onion shelter has been installed as a space to rest, relax and connect with others...Handspring Design- PROJECT
Hoop shelter with green roof for secondary school
Handspring designed, manufactured and installed a bespoke Hoop shelter for Stiwdio Hafod in Wrexham, a school that provides education and support for secondary school children who are unable to attend main stream school due to behavioural and mental health issues. As well as making safe spaces for the pupils, Handspring pushed the sustainability...Handspring Design- PROJECT
Green roof for new rustic bunkhouse - Perlethorpe Centre
Harrowden Turf's Enviromat® sedum green roof kit has been used on a new rustic bunkhouse at the Perlethorpe Centre in Nottinghamshire. The Centre works closely with schools and groups, providing individually-tailored days for young people and adults to enjoy outdoor learning experiences. Programmes aim to enrich the curriculum and help learners...Harrowden- PROJECT
Bespoke outdoor classroom with green roof for school
Handspring Design created a timber outdoor classroom with a green roof for a primary school in Whitley Bay. The frame was constructed in UK-grown Douglas Fir with six mortise and tenon jointed and pegged posts with braces onto a hexagonal ring beam. The roof is 12-sided around the perimeter and turns into a star when looking up, and features...Handspring Design- PROJECT