Detention + Retention = True Stormwater Management

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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

Purple-Roof

increased stormwater retention

Purple-Roof+

detention for true stormwater management

Why Use Purple-Roof?

Science. Resilience. Detention.

Purple-Roof 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.

Purple-Roof 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

Purple-Roof+ is pioneering detention in green roofs!

Purple-Roof profiles have been demonstrated to delay runoff up to 30 minutes and reduce peak runoff up to 45% .

go to Purple-Roof detention page
Proven Performance

Purple-Roof 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.

Purple-Roof has a solid track record in practical applications .

check out some Purple-Roof projects
Non-Proprietary Performance Specification

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

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

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Climate-Adapted

Purple-Roofs are not be one-size-fits-all.

Purple-Roofs are be designed and specified appropriate to their climate

Contact us for a Purple-Roof to fit your climate.

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Sustainability

Purple-Roofs include natural materials, contain 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.

Purple-Roof is a true stormwater management tool 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 Use Purple-Roof?

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

Anyone can purchase Purple-Roof-compliant components from Green Roof Specialty Products, but the Purple-Roof Seal of Approval applies to full green roof assemblies. We assist several companies who provide Purple-Roof-compliant assemblies. A Purple-Roof can be installed anywhere in the world! Contact us with any questions, including stormwater calculations.