DLCC plaza deck in Pittsburgh, PA

Vegetated Roof System Technology

Siplast was selling "green" roofs before green was cool

Siplast has been associated with vegetated roofs for over 30 years. Paradiene and Teranap membrane systems have successfully kept buildings watertight beneath vegetative roofs in France and Germany since the 1970s. Vegetated roofs have become increasingly popular since the early 2000s due to their numerous benefits, and Siplast has been an active part of that movement. To help you respond faster and more confidently to the growing demand for commercial green roofs and amenity spaces, Siplast has streamlined our system solutions and components under one umbrella name: ParaGREEN.

Why vegetated roofs?

There are several benefits associated with vegetated roofs. The most commonly recognized benefits are:

  • stormwater management,
  • reduced temperature fluctuations at the membrane, potentially resulting in energy savings,
  • increased roof longevity,
  • reduction of Urban Heat Island Effect, and
  • providing open space/habitat restoration.

Stormwater management

Stormwater runoff mitigation is the primary driver of extensive vegetated roofs due to the abundance of impervious surfaces in the urban environment. The rapid runoff from roof surfaces can exacerbate flooding and increase erosion, and, in cities with combined sewers, can result in raw sewage being discharged directly into waterways. Vegetated roofs can retain stormwater within the media profile and retention layers and reduce the volume discharged. Additional layers may be incorporated into the vegetated roof to provide detention, allowing the assembly to store stormwater for a determined amount of time and then release it slowly from the roof over several hours, reducing the impact of the storm event on the existing stormwater infrastructure.
DLCC plaza in Pittsburgh, PA

Energy efficient *

Vegetated roofs can help reduce heating and cooling demands on building systems. Growing media within the profile of the vegetated roof assembly provides some insulation value, and plants provide a cooling effect via evapotranspiration. These benefits reduce temperature swings at the membrane level and can reduce wear and tear on building mechanicals as well.
DLCC plaza in Pittsburgh, PA

Increased roof longevity 

Waterproofing membranes covered by vegetated roofs may have a longer life span than exposed membranes because the vegetated roof system helps protect the substrate from ultraviolet radiation and the extreme fluctuations in temperature that can cause roof membranes to deteriorate.
A 2006 study by Michigan State University verified temperature differences at various locations both inside and outside a test building, including a comparison between a gravel ballast roof and a vegetated roof. Sample results from the study are shown below.
Jacob K Javits Center in New York City

Help reduce Urban Heat Island Effect

Urban areas are generally 2°F - 5° F warmer than surrounding rural areas; this is known as the Urban Heat Island Effect. On top of that, the United States Environmental Protection Agency projects an increase in aggregate temperature for urban regions. Through evapotranspiration, vegetated roofs help mitigate the Urban Heat Island Effect.

Opportunities for design

Vegetated roofs offer exciting opportunities for architectural design. A vegetated roof can allow a structure to merge with the surrounding landscape, provide a dramatic accent, or reinforce the defining aspects of the structure's geometry. Vegetated roofs are frequently integrated into the design of hospitals and care facilities to provide a more restful and restorative environment for patients. City hospital administrators have observed that patients who can see green space outside often recover more quickly. Multi-unit residences and hotels find that views of vegetated roofs substantially enhance property values. In commercial settings, job satisfaction may be enhanced by providing window views of garden areas that can be used for breaks. Vegetated roofs can add serene communal space in urban areas, improving quality of life for city dwellers. The benefits include the potential removal of airborne dust, pollutants, and greenhouse gasses, as well as sound reduction and production of oxygen.

Siplast Vegetated Roof Systems 

Whether you're looking for a single-source vegetated roof solution, or need assistance developing complex assemblies for your unique project, the Siplast ParaGREEN™ line of Vegetated Roof Solutions can help you meet and exceed your vegetated roof demands. Plant selections appropriate for extensive assemblies include sedum, grasses, wildflowers, and other low-maintenance vegetation. ParaGREEN Intensive Vegetated Systems can be used for elaborately designed roofscapes that are intended for pedestrian access, and with deeper media profiles, a more diverse plant selection, including trees and shrubs, is possible.

From membrane through vegetation, Siplast provides complete vegetated roof solutions to meet your project needs, ensuring full-system compatibility and comprehensive system guarantees.**

In your journey to provide thriving green and amenity spaces, Siplast is with you every step of the way.

Teranap Waterproofing Membrane installed at Javits in NYC

Teranap Vegetated Roof Waterproofing System

Vegetated roofs add a great deal of aesthetic appeal, and utility, to a building project, but they also create significant waterproofing challenges.

For over 30 years, Teranap has met the needs of these demanding applications. Teranap vegetated roof applications can be specified with many landscape options, including both extensive green and intensive green assemblies.

Vegetated roof in NYC

Parapro Vegetated Roof System

For vegetated roof applications where project circumstances, local regulations, or a tight construction schedule make the application of sheet materials difficult, Siplast offers a proven high-performance option: liquid-applied Parapro.
The Parapro System is built on advanced polymethyl methacrylate (PMMA) technology developed for demanding waterproofing applications. PMMA's strong durability make Parapro a smart choice for vegetated roofs and planter waterproofing.

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