8/6/2019 ValleyCrest Prologis Green Roof Case Study

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Prologis Corporation Denver, CO

PROFILES ON GREEN ROOFS | Getting Smart About Building Green

Owner: The Prologis Corporation

General Contractor: The Weitz

Company

Landscape Architect: Norris

Design

Landscape Contractor:

ValleyCrest Landscape Development

Total Landscape Contract Value:

$640,000

Completion Date: April 2009

BACKGROUND

Prologis, one o the largest global providers o warehouse and distribution space

is also a pioneer in Denvers LEED-building movement. Prologis continues the

green trend with a new expansion and rootop garden bridge above an atrium that

will connect two buildings together. The campus is recognized by the US Green

Building Council (USGBC) as LEED Silver Registered and is awaiting certication

PROJECT SCOPE

ValleyCrest is completing the landscape, irrigation and hardscape o this

intensive green roo bridge as well as the propertys surrounding on grade

areas. Plants and trees native to the region were lited to the roo and planted

in a 16-inch-deep planting tray while a specialized drip irrigation system runs

rom inside the building and distributes water directly to the root o the plants

Pavers, made rom recycled concrete onsite, line the walkways or pedestrians

ValleyCrest Landscape Development Builds Garden Bridge

PROJECT FACTS

8/6/2019 ValleyCrest Prologis Green Roof Case Study

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www.valleycrest.com

Green roos and roo gardens soten the harshness and isolation o cities and suburbs and play an

important role in the development o LEED-certied buildings. There are three types o rootop gardens

A GREEN ROOF OFFERS MORE THAN JUST A PRETTY VIEW.

According to a report published by the American Society o Landscape Architects, the initial cost o greening

your roo is higher than conventional roong systems, but a green roo can pay or itsel over time. Green

roos extend the liespan o the roo membrane signicantly by protecting it rom sunlight and temperature

variations. On-structure gardens capture and utilize stormwater as their primary source o irrigation while

plants clean and lter the excess runof. Green roos and roo gardens cool the planet and protect against the

urban heat island efect, reducing roo temperatures by as much as 80 degrees Fahrenheit in warmer climates

COST SAVINGS WITH A GREEN ROOF

$5-$10 per square-foot

15-20 years

No cost savings

40+ years

10-15 percent

Standard Conventional Roof

Initial Cost Per Sq. Ft.

Average Liespan

Insulation Cost Savings

The rootop garden bridge at Prologis Corporation connects the campus two buildings together. An intensive rootop garden

the bridge is dotted with trees and plants that require more thorough irrigation installation and conventional maintenance

GREEN ROOF SPECTRUM

Green Roof

$10-$20 per square-foot

Intensive: an accessible, park-like roo garden with conventional trees and plants requiring irrigation and

maintenance.

Extensive: a traditional rootop blanket o sedum or sod requiring little maintenance.

Semi-Intensive: a combination o both.

GREEN YOUR ROOF WITH OPTIONS