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Roof Garden. Waterproofing System . Roof Garden – Today’s Advantages. Reduces urban heat island effects Storm water runoff management Adds valuable/useable space providing economic benefits Energy efficiency year-round Could earn LEED points. Roof Gardens. Kaiser Resources

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Presentation Transcript

Roof Garden

Waterproofing

System


Roof Garden – Today’s Advantages

  • Reduces urban heat island effects

  • Storm water runoff management

  • Adds valuable/useable space providing economic benefits

  • Energy efficiency year-round

  • Could earn LEED points


Roof Gardens

Kaiser Resources

Vancouver, BC

After

Before

Create high value, usable space


Roof Gardens

  • Rockefeller Center – 1933

Enhances view from neighboring buildings


Roof Garden - Design Principles

For Effective Waterproofing Systems:

  • Select highly puncture resistant membrane

  • Establishredundancy – Splice overlayment

  • Provide positive drainage at membrane level


Roof Garden - Design Principles

  • Ensure proper system protection

  • Incorporate drainage layer/root barrier

  • UtilizeMoisture Retention Mat (where applicable)


Roof Garden Assembly Types

  • Ultra-Extensive/Shallow– < 4” deep

  • Extensive/Medium– 4” - 8” deep

  • Intensive/Deep – > 8” deep


Shallow Assembly

  •  Growth Media

  • Moisture Retention Mat

  • Drainage Board

  • Protection Fabric

  • Membrane ( Adhered )

     Dens-Deck

  • Approved Insulation

     Substrate


Ultra-Extensive/Shallow Assembly

Growth Media – “Sedum”



Medium Assembly

  •  Growth Media

  • Moisture Retention Mat

  • Drainage Board

  • Root Barrier

     Protection Fabric

     Membrane ( Adhered )

     Dens-Deck

     Approved Insulation

     Substrate



Deep Assembly

  •  Growth Media

     Protection Fabric

     Drainage Gravel

  • Protection Fabric

  • Root Barrier

  • Extruded Polystyrene

     Membrane ( Adhered )

     Dens-Deck

     Approved Insulation



Protection/Drainage Components

In addition to the waterproofing material, other components must be utilized to ensure proper function:

  • Protection Fabric

  • Drainage Boards

  • Moisture Retention Mat

  • Extruded Polystyrene Insulation

  • Root Barrier


Planting Media

  • Planting media should meet the following criteria:

  • Not include silt that can clog drainage fabric

  • Provide permanent aeration

  • Provide adequate drainage

  • Supply or absorb water and nutrients

  • Retain its original volume


Planting Media

  • Planting Media Mix:

  • A mix suitable for most roof garden applications should be similar in content and percentage or composed of

    • 45% graded sand ( with no fines )

    • 45% expanded shale

    • 10% humus ( pine bark )



Roof Garden

Waterproofing

System


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