GreenroofsHelsinki Presentation 1.0 - October 10, 2011
Transcript of GreenroofsHelsinki Presentation 1.0 - October 10, 2011
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What You Need t o do More of , Bet t er, andWhat You Need t o do More of , Bet t er, andDif f erent l y When It Comes t o Green Roof s:Dif f erent l y When It Comes t o Green Roof s:
Lessons Learned from 10 Years of Green RoofLessons Learned from 10 Years of Green Roof
Research and Const ruct ion in Nort h Am er icaResearch and Const ruct ion in Nort h Am er ica
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Part 1Par t 1 -- Current St at e of Know ledge andCur rent St at e of Know ledge andResearch NeedsResearch Needs
RogerRoger Grot heGrotheJakeJake Grot heGrotheAloha Landscapi ngAloha Landscapi ng
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Aloha Landscapi ng
High Prof i l e Comm erci al Landscape Design/ Buil d Comp any
Green Roof Design Buil d Company
Green Roof Product Innovator
Green Roof Educator
Designed and Installed over 40,000 m2 of Green Roofs
Helped t o Design and Inst all t he First Green Roof on Guam
2009 Landscaper of t he Year
2010 Envir onment al Leadership Aw ard
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Green Roof Def ined
Creat ing a green space on t op of ahuman-m ade st ruct ure
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Green Roof s Com e in Al l Shapes
and Sizes
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Green Roof s Com e in Al l Shapes
and Sizes
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Green Roof s Com e in Al l Shapes
and Sizes
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Green Roof s Com e in Al l Shapes
and Sizes
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Green Roof s Com e in Al l Shapes
and Sizes
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Green Roof s Com e in Al l Shapes
and Sizes
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Green Roof s Com e in Al l Shapes
and Sizes
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Green Roof s Com e in Al l Shapes
and Sizes
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Green Roof s Com e in Al l Shapes
and Sizes
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Grow t h of t he Nort h Am erican
Green Roof Indust ry
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100 000
200 000
300 000
400 000
500 000
600 000
700 000
800 000
2004 2005 2006 2007 2008 2009 2010
Year
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a
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Me
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Annual % Grow t h of t he Nort hAm er ican Green Roof Indust ry
Year
P
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t
a
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G
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10
20
30
4050
60
70
80
2005 2006 2007 2008 2009 2010
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Shi f t From Novel t o Necessary
Percent age of Pri vat e Proj ect s is Cat ching Up Wit hGovernm ent St im ulus Green Roof Proj ect s
Depressed Com m erci al Proper t ies Are Looking t o Green
Roof s t o Help Incr ease Prop er t y Values
Devel oper s are Using Green Roof s t o Help Increase t heOveral l Size of t he Buil ding Foot pr int
Rapid Growth Requires Aggressive Environmental OffsetsProvi ded by Green Roof s
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Percent age of Pri vat e Proj ect s is Cat ching UpWit h Governm ent St im ulus Green Roof Proj ect s
Devel oper s and Buildi ng Ow ners Are Reali zing t heEconom ic, Environm ent al, and Social Benefi t ofInvest ing in Green Roofs Wit h or Wit hout GovernmentIncentives
Gener al Mil l s Worl d HQInt ensive/ Ext ensiveGreen Roof Sculp t ureGarden
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Depr essed Com m erci al Proper t ies Are Looking t oGreen Roof s t o Help Incr ease Propert y Values
Proper t y Managers/ Ow ners are Realizing That GreenSells
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Devel opers are Using Green Roof s t o Hel p Increaset he Overall Size of t he Buil ding Foot pr int
Retention Ponds Consume Valuable Land
Focus Poll ut ant s in a Single Area and Can Lead t o Wat erSupp ly Probl em s
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Rapid Grow t h Requi res Aggressive Envi ronm ent alOf f set s Provided by Green Roof s
A 2.5 cm Rainf al l Hit t ing . 4 Hect are of Asphalt Yields102,206 Lit ers of Wat er Where Wil l i t Go?
Tradi t ional Buil ding Mat eri als Especial ly Roof ing
Absorbs and Ret ains Heat Creat ing a Heat Isl andEf fect .
Loss of Green Space to Impervious Surfaces RequiresCreat ing New Green Spaces f or Wi ld l i f e and Plant
Species t o Survi ve.
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What We Know About Green Roof
Benef i ts
Excel l ent St orm Wat er Capt ure and Fi l t r at ion
Reduce Heat ing and Cooli ng Cost s
Reduce Local Heat Island Ef f ect
Ext end t he Li f e Expect ancy of Wat erpr oofi ng
Imp rove Prope rt y Values
Increase Self -Report of Sat isf act ion People Feel Bet t er
Urban Farm ing is Successf ul
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What We Know About Green Roof
Mechanics
Tray System Installations Not as Robust as ConventionalGreen Roof Syst em s
Expanded Shale/ Calcined Clay-Based Medium Has a High
Em bod im ent Energy Value Up t o 1, 300% Higher ThanPumice-Based Medium
Sub-Surf ace Dri p Irr igat ion Provides t he Most Ef f ici entWat er Dist r ib ut ion
Plant Palet t e Expands in Dir ect Relat ion t o Media Dept h
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Expanded Shale/ Calcined Clay-Based MediumHas a High Em bodi m ent Ener gy Value Up t o
1, 300% Higher Than Pum ice-Based Medium
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Tray Syst em inst al l at ions Not as Robust asConvent ional Green Roof syst em s
Trays Can Pul l Mem br ane and Cre at e Leaks
Black Edges Absorb Heat and Can Cause Plant Stress
The Gri d Wil l Nat ural ly Reassert It self Over Time
Europe Only Inst all s Appr oxim at ely 3-4% of Green Roof s Wit hTrays Versus 30-40% 10 Years Ago.
Doubl e t he Cost of Non-Tray Syst em s
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Expanded Shale/ Calcined Clay-Based MediumHas a High Em bodi m ent Ener gy Value Up t o
1, 300% Higher Than Pum ice-Based Medium
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Expanded Shale/ Calcined Clay-Based MediumHas a High Em bodi m ent Ener gy Value Up t o
1, 300% Higher Than Pum ice-Based Medium
Nat urall y Occur ri ng No Mini ng or Processing Requi red
Holds and Releases Wat er More Ef f ici ent ly Than Man-Made Prod uct s
High Albedo Coeff ient Helps t o Keep t he Roof Cooler byRef lect ing t he Sun
Low er Therm al Conduct ivi t y Helps Ret ain Heat inWinter
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Sub-Sur f ace Dr ip Ir r igat ion Provides t he MostEf f ic ient Wat er Dist r ibut ion
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Sub-Sur f ace Dr ip Ir r igat ion Provides t he MostEf f ic ient Wat er Dist r ibut ion
Provides Consist ent Moist ure
Eli m inat es Wat er Wast e w it h Sur f ace Evaporat ion
Creat es Wet t ed Area Up t o 45% Larger Than A Sur f aceDrip System
Doesn t Wat er Sur f ace Weed Seed
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Plant Palet t e Expands in Dir ect Relat ion t oMedi a Dept h
10. 2 cm Dept h
Sedum Most Variet ies
Ir i sh Moss Sagina Subulat a Al l i um Wi ld On ion
Geum Tr i f lo rum Prai r ie Smoke
Dalea Purpurea Purple Pra ir ie Clover
Sporobolus Het erro lepis Prair ie Dropseed
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Plant Palet t e Expands in Dir ect Relat ion t oMedi a Dept h
15. 2 cm Dept h
Sedum Most Variet ies
Al l i um Wi ld On ion Ir i sh Moss Sagina Subulat a
Geum Tr i f lo rum Prai r ie Smoke
Dalea Purpurea Purple Pra ir ie Clover
Sporobolus Het erro lepis Prair ie Dropseed
Bout e loua Cur t ipendu la Side Oats Gramma
Koele r ia Macran tha - June Grass
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Plant Palet t e Expands in Dir ect Relat ion t oMedi a Dept h
20. 3 30.5 cm Dept h
All Sedum Variet ies
All Perenni als Most Grasses
Some Compact Shrubs and Evergreens
Some Ornament al Trees w it h Wint er Prot ect ion
Cont inus Coggygr i a Smoke Tree
Kor ean Maple
Japanese Maple
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Cur rent Research Needs
Underst anding Wat erp roof ing Longevit y in Gr een RoofAppl ications
Bet t er Underst anding of t he Ret urn on Invest m ent (ROI)
Role of Aut omat ic Irr igat ion in Long-Term Survi val andPlant Healt h
Impact of Green Roof s on Populat ion Healt h and Heali ng
Fact ors That Increase Biodi versit y
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Key Resources
Green Roof s f or Healt hy Cit ies (GRHC)
Int ernat ional Green Roof Associat ion (IGRA)
World Green Roof Congress
Realgreenroofs.com
Green Roof Manual
Green Roof Plant s
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Green Roof Manual
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Green Roof Plant s
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QuestionsQuestions