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

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

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

8. Cool Roofs

9. 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

10. 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°

11. Cool Roofs

12. Cool Roofs

13. Cool Roofs

14. Cool Roofs

15. Urban Heat Island Effect

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

19. Recyclable Metal

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

22. Recycled Material

23. 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

24. Recycled Material Roofs - An Eco Challenge

25. 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

26. Low-Fume Roofing Materials

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

28. 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

29. Reeves Afterburner

30. Photovoltaic Roofing

31. 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

32. 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

33. Building Integrated Photovoltaic (BIPV) Materials

34. 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

35. 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

36. Photovoltaic Components

37. Photovoltaic Systems

38. Green/ Vegetative Roofing

39. 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

40. History of Vegetative Roofing

41. 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

42. 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

43. 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

44. 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

45. 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

46. 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

47. Intensive Green Roofs

48. 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

49. Extensive Green Roofs

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