Chicago s Garden Roofs and Drainage / Water Retention

Chicago s Garden Roofs and Drainage / Water Retention

Chicago s Garden Roofs Learning Objectives To understand how Garden Roofs slow water drainage, and why it s important

Why Do Garden Roofs Make Sense for Chicago?

Chicago s Garden Roofs Chicago s Landscape. Flat, Marshy Land Heavy Clay Underbase, Glacial Lake Chicago Poor drainage Short, Sluggish Chicago / Calumet Rivers Human Alterations Shoreline Filled City Raised Reversed River Flow New Lagoons, Ponds, Harbors Suburbs = less drainage» Source: Encylopedia of Chicago

Chicago s Water Drainage History Flooding in Chicagoland 12 Biggies since 1849 1849, 1855, 1938, 1952, 1954, 1961, 1973, 1986, 1987, 1996, 2007, 2008. Most record setting crests set after 1948 Suburb Development. Drainage Project Solutions Illinois & Michigan Canal - 1848 Reverse Chicago River 1900 Sanitary & Ship Canal 1900 North Shore Channel 1910 Cal-Sag Channel 1922 Locks Chicago River 1938 TARP Deep Tunnel

Chicago s Water Drainage Solutions Deep Tunnel 1960 s Current Drainage, Sewage Tunnels - Phase 1 109 Miles, 30 Years Reservoirs» McCook 2013, 2019» Thornton 2014 Treatment plants - Calumet & DesPlaines Rivers

Chicago s Water Drainage Solutions Result of TARP Deep Tunnel Save Lake Michigan & Chicago s Rivers Prevent Pollution from Stormwater

Chicago s Water Drainage Solutions Solutions?? Pourous Paving Systems Chicago s Alley Project Block L Pavers Sox Park Holds 600,000 Gals. In 100 year rains. Edge Notches 1/5 setting bed Gravel Base» Source IL Sports Facilties Authority

Chicago s Water Drainage Solutions Solutions?? More Deep Tunnels & Reservoirs?

SOLUTION: Garden Roofs for Chicago

Why Garden Roofs Slows Water Runoff

Chicago s Water Drainage Solutions Water Flow Through 1 Meter of: Gravel 2 minutes Sand 2 Hours Silt - 200 Days Clay 200 Years» Source: Michigan Tech Permeability Study

Chicago s Water Drainage Solutions Solutions? Water Retention Soils absorb 15-20% for 2-3 month period» Source: Environmental Design & Construction, May 1, 2003

Chicago s Water Drainage Solutions Solutions?? Chicago s Garden Roofs Slow Drainage, Store Water on Roofs.a typical green roof with about 3 inches of growing media can be designed to reduce annual runoff by more than 50 percent. Source, Website: CityofChicago.org Drainage / Water Retention Boards».6 -.11 GAL/SF Water Held on Roof Source: American Wick Drain

Why Garden Roofs? Energy Savings R-20 Mass Effect Slow to Heat/Cool

Why Garden Roofs Urban Heat Island Effect Reduction Earth Tone, Light Color Reflectivity = Cool Chicago

Why Garden Roofs Adds Value to Building More Usable Space. Aesthetically Pleasing

How to Specify Garden Roofs Specifications Classified In Division 7, Roofs CSI s MasterFormat 2004 07-33-63 - Vegetated Roofing

Garden Roof Standards ASTM Standards Under Development Wind Uplift NRCA Wind Study Southern Illinois University Official Results Pending FM Approval Standard for Vegetative Roof Systems, Class 4477 ASTM still working on Wind Fire No Testing Standards Yet.

Garden Roof Code Requirements ICC Code Requirements 2012 International Fire Code Wind, Fire Performance, per Chapter 15, Roofing Immediate removal of Dry Plants Fire Breaks every Approx. 15,000SF NOTE: Chicago Municipal Code 10,000 SF 2012 International Building Code Wind, Fire Performance, per Chapter 15, Roofing

Garden Roof Code Requirements Chicago Energy Code Reflectivity Garden Roofs meet UHI Requirements Mass Effect Plants & Environment Exception: if 50%, reflectivity drops to.3 (Gravel)

Garden Roof Installation Critical IT s ABOUT THE ROOF, and Everything else too!! Roofing Contractor = Prime Contractor Manage Roofing Construction Process Culture of Roofer Understands Working at Heights Safety Supervise trades on roof WC & GL Roofer Classification Over 2,000,000 SF Above Grade Roof that Doesn t Leak!

Garden Roof Installation Critical IT s ABOUT THE ROOF, and Everything else too!! Single Source Warranty Roofing System, Deck Up Roof, Protection Boards Drainage/Water Retention Boards Root Barriers, Irrigation System Soils Plants One Roof, One Call - Chicagoland s Professional Roofing Contractors & Local 11 Workforce

Garden Roof Installation Critical One Roof, One Call, Single Source Licensed as Roofing Contractors, Safe Workforce

Solutions?? Building Green Chicago Why Garden Roofs? Deep Tunnels?

Solution Garden Roofs CRCA Celebrates with Chicago 10 Years

Garden Roof IT s ABOUT THE ROOF, and Everything else too!! Slows Water Runoff Meets Urban Heat Island Effect Ordinance Aesthetically Pleasing Energy Savings Extends Roof Life Adds Value to Building Roof that Doesn t Leak!

Chicago s Garden Roofs and Drainage / Water Retention