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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
slide1

Roof Garden

Waterproofing

System

slide2

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
slide3

Roof Gardens

Kaiser Resources

Vancouver, BC

After

Before

Create high value, usable space

slide4

Roof Gardens

  • Rockefeller Center – 1933

Enhances view from neighboring buildings

slide5

Roof Garden - Design Principles

For Effective Waterproofing Systems:

  • Select highly puncture resistant membrane
  • Establishredundancy – Splice overlayment
  • Provide positive drainage at membrane level
slide6

Roof Garden - Design Principles

  • Ensure proper system protection
  • Incorporate drainage layer/root barrier
  • UtilizeMoisture Retention Mat (where applicable)
slide7

Roof Garden Assembly Types

  • Ultra-Extensive/Shallow– < 4” deep
  • Extensive/Medium– 4” - 8” deep
  • Intensive/Deep – > 8” deep
slide8

Shallow Assembly

  •  Growth Media
  • Moisture Retention Mat
  • Drainage Board
  • Protection Fabric
  • Membrane ( Adhered )

 Dens-Deck

  • Approved Insulation

 Substrate

slide9

Ultra-Extensive/Shallow Assembly

Growth Media – “Sedum”

slide11

Medium Assembly

  •  Growth Media
  • Moisture Retention Mat
  • Drainage Board
  • Root Barrier

 Protection Fabric

 Membrane ( Adhered )

 Dens-Deck

 Approved Insulation

 Substrate

slide13

Deep Assembly

  •  Growth Media

 Protection Fabric

 Drainage Gravel

  • Protection Fabric
  • Root Barrier
  • Extruded Polystyrene

 Membrane ( Adhered )

 Dens-Deck

 Approved Insulation

slide15

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
slide16

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
slide17

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 )
slide19

Roof Garden

Waterproofing

System