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WaterproofingSystem
WaterproofingSystem
Roof GardenRoof Garden
•Reduces urban heat island effects
•Storm water runoff management
•Adds valuable/useable space providing economic benefits
•Energy efficiency year-round
•Could earn LEED points
•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 Garden – Today’s Advantages
Roof Garden – Today’s Advantages
Roof GardensRoof GardensKaiser ResourcesVancouver, BC
After
Kaiser ResourcesVancouver, BC
After
BeforeBefore
Create high value, usable space
Create high value, usable space
Rockefeller Center – 1933
Rockefeller Center – 1933
Roof GardensRoof Gardens
Enhances view from neighboring buildingsEnhances view from
neighboring buildings
• Select highly puncture resistant membrane
• Establish redundancy – Splice overlayment
• Provide positive drainage at membrane level
• Select highly puncture resistant membrane
• Establish redundancy – Splice overlayment
• Provide positive drainage at membrane level
Roof Garden - Design PrinciplesRoof Garden - Design PrinciplesFor Effective Waterproofing Systems:For Effective Waterproofing Systems:
• Ensure proper system protection
• Incorporate drainage layer/root barrier
• Utilize Moisture Retention Mat (where applicable)
• Ensure proper system protection
• Incorporate drainage layer/root barrier
• Utilize Moisture Retention Mat (where applicable)
Roof Garden - Design Principles
Roof Garden - Design Principles
• Ultra-Extensive/Shallow – < 4”
deep
• Extensive/Medium – 4” - 8”
deep
• Intensive/Deep – > 8” deep
• Ultra-Extensive/Shallow – < 4”
deep
• Extensive/Medium – 4” - 8”
deep
• Intensive/Deep – > 8” deep
Roof Garden Assembly TypesRoof Garden Assembly Types
Shallow AssemblyShallow Assembly
Growth Media
Moisture Retention Mat
Drainage Board
Protection Fabric
Membrane ( Adhered )
Dens-Deck
Approved Insulation
Substrate
Growth Media
Moisture Retention Mat
Drainage Board
Protection Fabric
Membrane ( Adhered )
Dens-Deck
Approved Insulation
Substrate
Ultra-Extensive/Shallow Assembly
Ultra-Extensive/Shallow AssemblyGrowth Media – “Sedum”Growth Media – “Sedum”
Ultra-Extensive/Shallow Assembly
Ultra-Extensive/Shallow Assembly
Medium Assembly Growth Media
Moisture Retention Mat
Drainage Board
Root Barrier
Protection Fabric
Membrane ( Adhered )
Dens-Deck
Approved Insulation
Substrate
Growth Media
Moisture Retention Mat
Drainage Board
Root Barrier
Protection Fabric
Membrane ( Adhered )
Dens-Deck
Approved Insulation
Substrate
Roof Garden – Medium Assembly
Roof Garden – Medium Assembly
Deep Assembly Growth Media
Protection Fabric
Drainage Gravel
Protection Fabric
Root Barrier
Extruded Polystyrene
Membrane ( Adhered )
Dens-Deck
Approved Insulation
Growth Media
Protection Fabric
Drainage Gravel
Protection Fabric
Root Barrier
Extruded Polystyrene
Membrane ( Adhered )
Dens-Deck
Approved Insulation
Intensive Assembly/DeepIntensive Assembly/Deep
Protection/Drainage Components
Protection/Drainage Components
• Protection Fabric
• Drainage Boards
• Moisture Retention Mat
• Extruded Polystyrene Insulation
• Root Barrier
• Protection Fabric
• Drainage Boards
• Moisture Retention Mat
• Extruded Polystyrene Insulation
• Root Barrier
In addition to the waterproofing material, other components must be utilized to ensure proper function:
In addition to the waterproofing material, other components must be utilized to ensure proper function:
Planting MediaPlanting MediaPlanting 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 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 MediaPlanting MediaPlanting 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 )
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 )
Weights of Plant Medialbs/ft3
Weights of Plant Medialbs/ft3
MaterialMaterial DryDry DampDamp
Fine sandFine sand 9090 120120
Cedar shavings with Cedar shavings with Fertilizer Fertilizer
9.259.25 1313
Peat mossPeat moss 9.69.6 10.310.3
Redwood compost and Redwood compost and shavingshaving
14.814.8 22.222.2
Fir and pine bark humusFir and pine bark humus 22.222.2 33.333.3
PerlitePerlite 6.56.5 32.432.4
WaterproofingSystem
WaterproofingSystem
Roof GardenRoof Garden