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State of Connecticut Department of Public Works Roof Presentation Trends in Commercial Roofing PowerPoint Presentation
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State of Connecticut Department of Public Works Roof Presentation Trends in Commercial Roofing

State of Connecticut Department of Public Works Roof Presentation Trends in Commercial Roofing

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State of Connecticut Department of Public Works Roof Presentation Trends in Commercial Roofing

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  1. State of ConnecticutDepartment of Public Works Roof Presentation Trends in Commercial Roofing

  2. What We Hope to Accomplish • Sustainable Design • Converting Low Slope to Standing Seam Metal • The Design Build Delivery Method

  3. Trend in Commercial Roofing

  4. Sustainable Design Program # 099 GR

  5. 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

  6. Major “Sustainable” Innovations • Cool Roofs • Recyclable Metal Roofs • Recycled-Material Roofs • Low-Fume Roofing Materials • Photovoltaic Roof Systems • Green Roofs • LEED™ Certification

  7. Cool Roofs

  8. Cool Roofs - Terms Albedo (Reflectivity) - Amount of Solar Energy Reflected Away From a Surface, Usually Given as a Ratio. • Aluminized Asphalt 0.40 • Asphalt 0.09 • White Coating/Membrane 0.85

  9. 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 110° • Aluminum Coated Roof 140° • Black EPDM 190°

  10. Cool Roofs

  11. Cool Roofs

  12. Cool Roofs

  13. Cool Roofs

  14. Urban Heat Island Effect

  15. Cool Roofs - Product Options • ENERGY STAR RATED MATERIALS • Reflective Coatings • Urethane & Acrylic • White Membranes • TPO & PVC • Standing Seam Metal • Select Colors

  16. Recyclable Metal

  17. Recyclable Metal Roofs • 100% Recyclable • Easy to Install • No Fumes or Kettles • Aesthetically Diverse • Long Lasting

  18. Recycled Material

  19. 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

  20. Recycled Material Roofs - An Eco Challenge

  21. 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

  22. Low-Fume Roofing Materials

  23. Fume-Reduction Solutions • Fume-Capturing Kettles • Cold Adhesives • Reduced-Emission Bitumens • Odor Free Built Up Roof Applications • Low VOC Compliant Materials

  24. 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

  25. Reeves Afterburner

  26. Photovoltaic Roofing

  27. 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

  28. 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

  29. Building Integrated Photovoltaic (BIPV) Materials

  30. 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

  31. 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

  32. Photovoltaic Components

  33. Photovoltaic Systems

  34. Green/ Vegetative Roofing

  35. 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

  36. History of Vegetative Roofing

  37. 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

  38. 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

  39. 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

  40. 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

  41. 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

  42. 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

  43. Intensive Green Roofs

  44. 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

  45. Extensive Green Roofs

  46. Components of a Vegetative Roof System • Structural Deck • Insulation • Waterproofing • Root Resistance • Drainage/Filter • Root Reinforcement • Growth Media • Plant Material • Water Storage & Irrigation