State of Connecticut Department of Public Works Roof
State of Connecticut Department of Public Works Roof Presentation Trends in Commercial Roofing What We Hope to Accomplish Sustainable Design Converting Low Slope to
Standing Seam Metal The Design Build Delivery Method Trend in Commercial Roofing Sustainable Design
Program # 099 GR What Is Sustainable Design?
Made From Recycled Materials Can be Recycled Has a Long Service Life Promotes Efficient Use of Natural Resources Maintains a Healthy Global Environment
Major Sustainable Innovations
Cool Roofs Recyclable Metal Roofs Recycled-Material Roofs Low-Fume Roofing Materials Photovoltaic Roof Systems Green Roofs LEED Certification
Cool Roofs Cool Roofs - Terms Albedo (Reflectivity) - Amount of Solar Energy Reflected Away From a Surface, Usually Given as a Ratio. Aluminized Asphalt
Asphalt White Coating/Membrane 0.40 0.09 0.85 Cool Roofs - Facts
Building Owners Spend $40 Billion Each Year on Air Conditioning White Roofs Require 40% Less Energy for Cooling Than Dark Roofs White Roofs can Reduce Peak Cooling Demand by 10-15 Percent On a Typical 90 Day: -
White Coated Roof Aluminum Coated Roof Black EPDM 110 140 190
Cool Roofs Cool Roofs Cool Roofs Cool Roofs
Urban Heat Island Effect Cool Roofs - Product Options ENERGY STAR RATED MATERIALS Reflective Coatings Urethane & Acrylic
White Membranes TPO & PVC Standing Seam Metal Select Colors Recyclable Metal
Recyclable Metal Roofs 100% Recyclable
Easy to Install No Fumes or Kettles Aesthetically Diverse Long Lasting Recycled Material Recycled Material Roofs
250 Million Tires Each Year Are Discarded in the U.S. 75% Are Discarded in Landfills or Illegal Dumps Landfills Are Running Out of Space Associated Health Problems Include: Fires, Water Contamination, Mosquitoes
Recycled Material Roofs An Eco Challenge Recycled Material Roofs Uses Post-Consumer Tire Material Instead of Traditional Filler Incorporates Post-Industrial Boiler Slag for Surfacing Provides Superior Performance Can Be Applied with Cold Adhesive thus Eliminating
Fumes Incorporates Recycled Glass as A Release Agent Incorporates Starburts Mineral for Increased Reflective Values Low-Fume Roofing Materials
Fume-Reduction Solutions Fume-Capturing Kettles
Cold Adhesives Reduced-Emission Bitumens Odor Free Built Up Roof Applications Low VOC Compliant Materials Reeves Afterburner Virtually Eliminates all Vapor Emission with Lid Closed
Exhaust Is Clear and 98% Odorless No Filter to Clean or Replace Attached to Kettle Simple Design Reeves Afterburner Photovoltaic Roofing
Photovoltaic Systems Convert Sunlight Into Electricity Made of Semiconducting Materials.
The Simplest Photovoltaic Cells Power Watches and Calculators Complex Systems Can Light Houses and Provide Power to the Electrical Grid Photovoltaic Systems Crystalline Silicon (C-si) Is the Leading Commercial Material for Photovoltaic Cells
Thin Film Photovoltaic Cells Use Layers of Semiconductor Materials Only a Few Micrometers Thick Attached to an Inexpensive Backing Such As Glass, Flexible Plastic, or Stainless Steel Multi Junction Devices Stack Individual Solar
Cells on Top of Each Other to Maximize the Capture and Conversion of Solar Energy The Top Layer (or Junction) Captures the Highest-Energy Light and Passes the Rest on to Be Absorbed by the Lower Layers Building Integrated Photovoltaic (BIPV) Materials
Why Photovoltaics (PV)?
Provides Fixed-Cost Electricity Peak Performance During Peak Demand Clean Energy Unobtrusive and Silent Building Integration
Low Maintenance Predictable and Consistent Output No Power Wasted Photovoltaic Facts Since 1990, the Photovoltaics Industry as a Whole Has Seen Sales Volume Grow by More Than 20% Each Successive Year, With Some Years Having
45% Growth Since 1992, Manufacturing Costs for Photovoltaics Have Dropped by More Than 30% By 2010, Costs are Predicted to Drop Another 50% The Average Cost of Photovoltaic Modules Through a Distributor is Between $5-12 per Watt or Between $25-40 Per Square Foot
Photovoltaic Components Photovoltaic Systems Green/ Vegetative Roofing What is a Green Vegetative Roof? Often Referred to as Garden Roofs
Roofs with a Growing Media and Plants Taking the Place of a Bare Membrane, Gravel Ballast, or Conventional Surfacing At the Least, They Include a Waterproofing Layer, Drainage, Growing Media and Plants History of Vegetative Roofing
History The Hanging Gardens of Babylon Were Green Roofs Waterproofed with Bitumen and Reeds Sod Roofs Have Been Used for Hundreds of Years
Current Technology Originated in Germany Over 30 Years Ago Why a Vegetative Roof? Ecological Advantages Reduce Storm Water Run Off by 15 -90% Depending on Rain Intensity and Soil Depths Reduce Urban Heat Island Effect by Producing
Lower Air Temperatures and Increasing Humidity Becomes a Natural Air Filter, Absorbing Pollutants and Binding Dust Particles Increased Biodiversity at Roof Level of Plants and Animals Why a Vegetative Roof? Economic Advantages
Building Energy Costs can be Reduced Due to Natural Thermal Insulation Protects Waterproofing Membranes, Extending Service Life of Roofing Materials Rooftop Space is Now Valuable, Usable Real Estate Vegetative Roof Design
Requires Appreciation and Knowledge of Plant Biology, Hydraulic Engineering, Roofing and Architecture Must Address Critical Features:
Saturated Weight of System Load Bearing Capacity Moisture Penetration/Leak Resistance of Waterproofing Membrane
Root Penetration Resistance to Wind Management of Drainage Suitability of Plant Life Most Importantly Long-Term Waterproofing Types of Vegetative Roofs
Intensive Diverse Plant Communities High Profile, Recreation Spaces Heavy Thick Soil Substrates Extensive Simple Plant Communities with Limited Human Access
Usually can be Retrofitted on Existing Structure Lightweight, Thinner Soil Requirements Intensive Vegetative Roofs Soil: Requires Minimum of One Foot of Soil Depth Vegetation: Accommodates Large Trees, Shrubs, and
Well-maintained Gardens Load: Adds 80-150 Pounds Per Square Foot of Load to Building Structure Access: Regular Access Accommodated and Encouraged Maintenance: Significant
Maintenance Required Drainage: Includes Complex Irrigation and Drainage Systems Intensive Green Roofs Extensive Vegetative Roofs
Soil: Requires Only 2 to 5 Inches of Soil Depth Vegetation: Capable of Including Many Kinds of Vegetative Ground Cover and Grasses Load: Adds Approx. 12-50 Pounds Per Square Foot
Depending on Soil Characteristics and the Type of Substrate Access: Usually Not Designed for Public Accessibility Maintenance: More Maintenance Equals More Aesthetic Appearance
Drainage: Irrigation and Drainage Systems Are Simple Extensive Green Roofs Components of a Vegetative Roof System
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