greenroofshelsinki presentation 2.0 - construction techniques - october 10, 2011

7/30/2019 GreenroofsHelsinki Presentation 2.0 - Construction Techniques - October 10, 2011

1/65

What You Need t o do More of , Bet t er, andWhat You Need t o do More of , Bet t er, and

Dif 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 f rom 10 Year s of Green RoofLessons Learned f rom 10 Year s of Green RoofResearch and Const ruct ion i n Nor t h Am er icaResearch and Const ruct ion i n Nor t h Am er ica


2/65

Par t 2Par t 2 Gr een Roof Market s, Const ruct ionGreen Roof Market s, Const ruct ionand Veget at ion Techni quesand Veget at ion Techni ques

RogerRoger GrotheGrotheJakeJake Grot heGrotheAloha LandscapingAloha Landscaping


3/65

Green Roof Markets

New Const ruct ion - Publ ic

New Const ruct ion Pri vat e

Dem onst rat ion Proj ect

Research Proj ect

Roof Repl acem ent

Value-Add Proj ect


4/65

Roof Replacem ent

Upgrade t o Green Roof If St ruct ur all y Capable

Take Advant age of Tax Credi t s and Wat er shed Grant s

Re-Brand as a Green Bui ld ing

Less Exp ensive


5/65

Value-Add Proj ect

Creat e New Value Wit h Green Space Am enit y

Take Advant age of Tax Credi t s and Wat er shed Grant s

Posit ion Proper t y f or Fut ure Green Infr ast ruct ureImprovements


6/65

Types of Green Roofs

Type of Roof Extensive ( 15 cm)

Flat X X

Sloped X

Plaza/ Ent er t ainment X X

Canopy X


7/65

Ext ensive Green Roof s - Flat


8/65



9/65



10/65

Ext ensive Green Roof s - Sloped


11/65

Ext ensive Green Roof s - Sloped


12/65

Int ensive Green Roof s


13/65



14/65



15/65



16/65



17/65

Int ensive Green Roof s - Plaza


18/65

Int ensive Green Roof s - Plaza


19/65

Canopy - Ext ensive


20/65

Canopy - Int ensive


21/65

Canopy - Int ensive


22/65

Canopy - Int ensive


23/65

Green Roof Const ruct ion Trends

Manufacturer Consolidation

Shif t t o Pre -Grow n Trays and Veget at ed Mat s

Int erest in Biodi versit y Dri ven Design

Cost Reduc t ion and Ret urn on Invest m ent (ROI)


24/65

Manufacturer Consol idation

Roof ing Manuf act ur ers Focusing on Tot al Solu t ions

Roof ing Cont ract ors Becoming Green Cont ract ors

Dif f icul t t o Request Alt ernat e Roof ing/ Veget at ionSystems

Harder t o Appl y Best Pract ices w it h Warrant y-Dri venGreen Roof Syst em s

If you only have a hamm er, you t end t o seeevery pr oblem as a nai l


25/65

Shi f t t o Pre-Grow n Trays andVeget at ed Mat s

Fear of Leaks Dri ves Inst ant Green Roof Grow t h

Low Quali t y Wat erp roof ing Mem branes EncourageAddi t ional Prot ect ion Provided by Plast ic Trays

Borde rl ine Envir onm ent s Requir e Alt ernat ive Veget at ionApproaches

Lack of Underst anding of Green Roof Plant Perf orm ance

Leads t o Nursery Grow n Trays and Veget at ed Mat s


26/65

Int erest in Biodi versit y Dr ivenDesign

More Ser ious Discussions About Nat ive Plant s

Reali zat ion That a Green Roof Does Not Repl ace GroundLevel Habit at

New Underst anding of t he Role Green Roof s Play inProm ot ing Rare and Even Endangered Plant and InsectSpecies


27/65

Cost Reduct ion and Ret urn onInvestment (ROI)

Novelt y i s Replaced w it h Fiscal Responsibi l i t y

Green Infr ast ruct ure Impr ovement s Wil l Be JudgedAgainst t he Same Financ ial St andards

Green Branding Em phasis Doesn t Mean BiggerBudget s f or Green Infr ast ruct ure Proj ect s

Going Green is Not an Em ot ional Exercise


28/65

Cost Reduct ion and Ret urn onInvestment (ROI)

Mal l of Am er icaMal l of Am er ica

Case StudyCase Study


29/65


30/65


31/65


32/65


33/65


34/65


35/65


36/65


37/65


38/65


39/65


40/65


41/65


42/65


43/65

How Low Can You Go?How Low Can You Go?


44/65


45/65


46/65


47/65

Mall of Am er ica Case St udy EndResult

But t erf ly Bay Open f or 1. 5 years

Over 1 Mil l ion Visit ors

Massive Med ia Exposur e

$500K Corp orat e Sponsor Not Accept ed

Solar Proj ect Cancell ed Too Expensive

But t erf ly Bay and Eco Park Replaced w it h New Ride


48/65

Cli ent Expect at ions

Client FocusDeveloper Cost

Archi t ect Unique Feat ures

Ow ner / Occupant Looks/ Funct ional i t y

Government / Publ icIn i t ia t ive

Construction Precision


49/65

Critical Success Factors -Developer

Lowest Cost / Highest Qual i t y

Manage Schedule and Quali t y

Const ant Comm unicat ion and Expect at ion Clar i f icat ion

Minimize Risk


50/65

Critical Success Factors -Archi tect

Underst and Specif icat ions and Qualit y Inspect ions

Qualit y of Work and Visual Percept ion

Clari f y Product / Met hods Quest ions and Probl em s

Request Substitutions Early in Process

Complet e Punch List Quickl y


51/65

Critical Success Factors Ow ner/ Occupant

Creat e Clear Cont ract Document s and Expect at ions

Manage Schedu le and Budget

No Suprises

Fin ish On-Tim e or Earl y

Provide Maintenance During Establishment Period


52/65

Critical Success Factors Governm ent In i t iat ive

Clari f y Proj ect Managem ent Hierarchy

Deli ver Subm it t als On-Time

Managem ent Schedule and Qualit y

Focus on Proj ect Com plet ion and Best Pract ices

Meet All Safet y Guide li nes


53/65

Const ruct ion and Veget at ionTechniques

Know Your Wat erproof ing Prod uct s and Det ail s

Know Your Paver s and Ballast Mat er ial s

Know Your Gr een Roof Medi a

Know Your Green Roof Veget at ion Opt ions

Know Your Ir r i gat ion Opt ions

Know Your Mat er ial Handli ng Opt ions

Know Your Costs


54/65

Know Your Wat erpr oof ingProduct s and Det ai l s

Sheet Memb rane Peel and St ick (60 mil )

Cold Appl ied Syst em (60 m il )

TPO Therm oplast ic Polyolef in (60 m il )

Hot Appl ied Bui l t -Up (210m il )


55/65

Know Your Pavers and Bal l astMater ia ls

Prot ect s Wat erp roof ing Syst em at t he Buil di ng Edge

Provid e Fir e Break Prot ect ion Veget at ion Free Zones

Can Be Pavers or Gravel Ballast


56/65

Know Your Green Roof Media

Structure Determines Media Depth

Typ ical l y 95% Inor ganic

Miner al Component is Typical ly Calci ned Clay,

Expanded Shale , Pum ice , Volcanic Crushed St one,Crushed Br ick , or Graded Sand

Heavier t he Mix More Drainage Reli ef Requir ed

K Y G R f V i


57/65

Know Your Green Roof Veget at ionOpt ions

Cli ent Expect at ions Dri ve Plant ing Syst em

Seeding is Dif f icul t Result s in Brow n Roofs wi t h Weeds

Cut t ings is Cost Ef f ect ive Sever al Years t o Est abl ish

Plugs All ow f or Design Flexibi l it y and Est abl ish Quickl y

Trays Creat e an Inst ant Green Roof Expensive

Veget at ed Mat s Creat e an Inst ant Green Roof - Expensive


58/65

Know Your Ir r igat ion Opt ions

No Ir r igat ion Hand Wat er

Sub-Surf ace Dri p Most Ef f ici ent

Sur f ace Dr ip

Trad it ional Pop-Up Spr ays

Water Harvesting Systems Can Supply Water


59/65

Know Your Mat er ial Handl ingOpt ions

Telebel t Conveyor Syst em 15 Met ers


60/65

Know Your Mat er ial Handl ing


61/65

Know Your Mat er ial Handl ingOpt ions

Blow er 15 Met ers


62/65

Know Your Cost s

ScopeTradit ional green roof syst em installed on 1,000 m2

roof at an elevation of 17 meters or less.

Unit Cost

Drainage Mat and Fi l t er Fabr ic (DBR50) m 2 10. 22

Soi l / Media (15cm Pum ice-Based Med ia) m 2 33. 79

Ir r igat ion (Sub-Sur f ace Dr ip) m 2 12. 48

Plant s (22 Plugs m 2) m 2 25. 07

Wind Erosion Mat (Jut e w i t h St akes) m 2 12. 37One-Year Maint enance (6 Visi t s) m 2 3. 29

Tot al 97. 22


63/65

It Ai n t Green If It Ai n t Green


64/65

Green Roof Plant s


65/65

QuestionsQuestions

greenroofshelsinki presentation 2.0 - construction techniques - october 10, 2011

Documents