Green Roofs in Sloped Applications

Green roofs are now feasible in sloped applications with Hydrotech's Garden Roof® Assembly, allowing design professionals to expand beyond traditional flat roof applications and put a green roof in places they never could before.

In addition, a sloped Garden Roof Assembly can be designed for visibility and viewing from a wider range of locations, not just standing on the roof. Slopes ranging from 2:12 up to 12:12 are possible for extensive and limited intensive applications, provided the appropriate measures are taken to cope with the shear forces and soil retention. Contact Hydrotech for specific requirements.

Features of Garden Roof® Assembly for Sloped Applications:

  • Depth (3.5” - 13” of growing media)
  • Visibility can be an architectural design feature
  • Suitable for convex, concave and other complex slopes
  • Accomodates up to 12:12 pitch (45º)
  • Beyond 3:12 requires special engineering
  • Vegetation options - plugs with GardMat® or InstaGreen® Sedum Carpet or InstaGreen® Sedum Tile or lawn sod
  • Requires maintenance depending on vegetation selection

Typical Application:

Architects and owners are no longer limited to designing for flat green roof applications. Hydrotech’s Garden Roof® Assembly can now conform to irregular slopes and undulating roofs. For roof slopes greater than 3:12 and with soil depths of 3½ to 13 inches, a GardNet® soil confinement system must be utilized.

Recent Press

  • April 3, 2017
    Wind data is a critical issue to consider when building a new structure. An increase in the number of green roofs on buildings has driven a need for new wind design standards to be written for vegetative roofing assemblies. Richard Hayden discusses...
  • October 20, 2016
    (November 15, 2016) Richard Hayden, Hydrotech's Garden Roof Department Manager, will be speaking at the 2016 LED Specifier Summit and High Performance Building Forum. The design community continues to struggles with how to handle ever-increasing...
  • September 24, 2015
    (August 5, 2016) Excerpt from an article in Stormwater Magazine . With their myriad benefits, green roofs are becoming increasingly incorporated into new and existing projects. The International Green Roofs and Walls Project Database lists 1,599...
  • July 16, 2016
    (July 16, 2016) Excerpt from an article in Forester Daily News Green roofs – also known as vegetated or garden roofs – are key green infrastructure elements and are being increasingly recognized for their “valuable ability to absorb, reduce, and...
  • July 1, 2016
    CHICAGO, ILLINOIS (July 1, 2016) City Creek Center in downtown Salt Lake City, Utah, is one of the largest mixed-use urban developments built in the last 10 years. It's also one of the most innovative. Completed in 2012, the 23-acre project includes...
  • July 2, 2014
    American Hydrotech Inc. has released a free, interactive digital version of the company's popular Garden Roof® Planning Guide. The app – unveiled last week at the AIA Expo in Chicago – features pinch-to-zoom product photography, video animations, photo galleries showing Garden Roof® Assemblies in real-world applications, and design considerations.

Upcoming Events

    October 21, 2017 to October 22, 2017

    ASLA 2017 Annual Meeting and EXPO

    Los Angeles CA Event Details
    November 8, 2017 to November 9, 2017

    USGBC 2017 International Conference and Expo

    Boston Convention & Exhibition Center – Boston MA Event Details