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 substrate
A green roof is a unique environment that calls for a unique growing medium. Harrowden Turf's growing medium meets the needs of both the building and the plants. Its specially blended extensive green roof substrate is tested to the German FLL guidlines (2018) and provides the perfect base for establishing a green roof. An extensive green roof...Harrowden- PRODUCT
Grassroof - green roof system
Grassroof is an overlay paving system that can be applied to new or existing flat roofs to provide a base layer for green roofs. It can be used in extensive, simple-intensive and intensive green roof designs...Grass Concrete- PRODUCT
Semi-Intensive Lightweight Green Roof Subsoil - green roof sand & aggregate
MCM Lightweight Green Roof Subsoil is a specialist blend made from sand and lightweight aggregate, designed for green roofs, roof gardens, and podium landscapes where reduced weight is important: specialist subsoil blend for green roof and landscape applications; lightweight composition reduces structural load on buildings; suitable for use with...MCM-SE- PRODUCT
Wildflower plugs for green roofs
A specially-curated blend of hardy, low-maintenance native British wildflowers for green roofs. This mix, including species like sedum, wild thyme and saxifrage, not only adds a burst of colour but also contributes to biodiversity and helps with insulation. Turn rooftops into a sustainable and eco-friendly haven that benefit both the environment...British Wild Flower Plants- PRODUCT
Terraxx - green roof drainage membrane
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 clogged...Delta Membrane Systems- PRODUCT
Enviromat® - sedum matting for extensive 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
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
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
Enviromat - natural feed for sedum green roofs
Harrowden's specially formulated sedum fertiliser, designed for living roofs, covers 65m2. Sedum fertiliser is an essential part of its recommended green roof maintenance regime. This slow-release organic feed is formulated for healthy and robust plants and maximises benefits for any living green roof. Sedum fertilisers offers a wealth of...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
Meadowmat - wildflower turf for green roofs
Meadowmat is a green roofing product that makes it easy to establish a biodiverse habitat on the harsh environs of a roof. The 23 species of native flowers and grasses have been specially selected for their suitability to the conditions on a roof. They are perennial, frost-hardy, reasonably drought-tolerant and tough enough to put up with blustery...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....Harrowden- PROJECT
Enviromat polythene root barrier for green roofs
Black low-density polyethylene film originally designed to cover fodder, providing an excellent barrier against water and air. It has a good tensile strength making it ideal for protecting the waterproofing layer on green roofs from root damage....Harrowden- PRODUCT
Roof glazing replacement - Green Park Station, Bath
Following a safety incident at Green Park Station in Bath, the Standard Patent Glazing Co's expertise was sought to assess the condition of the station’s glazing system. After conducting a thorough condition survey, it compiled a comprehensive report indicating the need for a complete replacement. Green Park Station, originally known as Queen...The Standard Patent Glazing Company- PROJECT
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. ...Harrowden- PRODUCT
Intensive Green Roof Substrate - lightweight soil for roof gardens
MCM Intensive Lightweight Green Roof Substrate is a lightweight, low-porosity soil blend made from sand, compost, and aggregate, designed for intensive and semi-intensive green roofs, podium landscapes, and container planting. Supplied in bags or bulk, it supports healthy, well-drained plant growth while reducing roof load weight: lightweight...MCM-SE- PRODUCT
Extensive Green Roof Substrate - lightweight compost blend for sedum roofs
MCM Extensive Green Roof Substrate is a lightweight soil blend made from 10mm graded PAS 100 compost, 8–14mm expanded clay aggregate, and mulched wood fines. Designed for low-maintenance green roofs and sedum planting, it has low organic content, high porosity, and balanced particle size for effective drainage and plant support: lightweight...MCM-SE- PRODUCT
Enviromat - sedum roof trays
Enviromat sedum roof trays can be used to transform garden roofs. Sedums are a pollinator-friendly species that come in varied colours and textures and offer long flowering periods. The trays allow the sedum to be easily transported and installed....Harrowden- PRODUCT
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