Detention + Retention = True Stormwater Management

What Is Purple-Roof?

Purple-Roof is a non-proprietary specification for the optimal green roof.
Purple-Roof pioneers detention for true green roof stormwater management.

Purple-Roof is a green roof (with a funny name) that optimizes stormwater retention and is pioneering detention in green roofs.

Purple-Roof is a specification, not a product. See where you can get Purple-Roof.

Traditional

your grandfather's green roof

the Sponge-Roof concept

increased stormwater retention

the Purple-Roof concept

detention for true stormwater management

Why Use Purple-Roof?

Science. Resilience. Detention.

The Purple-Roof concept is scientifically developed for resilience by balancing vegetation, soil, retention, and drainage.

Purple-Roof combines this balance with the exclusive ability to truly detain a storm. Every time.

Read more.

The Purple-Roof concept is scientifically developed for resilience by balancing vegetation, soil, retention, and drainage.

Purple-Roof combines this balance with the exclusive ability to truly detain a storm. Every time.

Read more.
Need more reasons to use Purple-Roof?
Stormwater Detention

The Purple-Roof concept is pioneering detention in green roofs!

Purple-Roof profiles delay runoff and reduce peak runoff intensity to comply with stormwater detention requirements for design storms.

go to Purple-Roof detention page
Proven Performance

The Purple-Roof concept was born from 20 years of worldwide experience and exhaustive green roof research.

We research before we make claims, and we back up our claims with scientific evidence.

check out some projects implementing the Sponge-Roof and Purple-Roof concepts
Non-Proprietary Performance Specification

The Purple-Roof concept is a non-proprietary specification , not a product!

Purple-Roof projects can be competitively bid without breaking spec.

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Climate-Adapted

Green roofs should not be one-size-fits-all.

The Purple-Roof concept includes be designing and specifying appropriate to a project's climate

Contact us to adapt Purple-Roof to fit your climate.

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Sustainability

The Purple-Roof concepts includes natural materials, contains no harmful chemicals such as Formaldehyde.

Purple-Roof focuses on soil ecology following principles of nature to minimize the need for fertilizer, plant replacement, and weeding.

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Return on Investment

We believe the owner should see a return on investment of a green roof, beyond merely meeting regulatory requirements.

Core to the Purple-Roof concept is making green roofs a true stormwater management tool by incorporating retention and detention .

This frees up space for maximum real estate potential while realizing all other benefits such energy savings, biodiversity, habitat creation, and heat island benefits.

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How To Incorporate the Purple-Roof concept?

See links below for specs, details, a green roof modeler, or contact us!

We work with several companies who offer Purple-Roof-compliant assemblies. The Purple-Roof concept can be implemented anywhere in the world! Contact us with any questions, including stormwater calculations.