How To Design A Sustainable Roofing
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1 Benchmark, Inc. Perspectives Webinar Series Sustainable Roofing: A Practical Strategy for Roof Replacement Commitment from the ground up.
2 Presenters Dr. James Hoff, DBA Center for Environmental Innovation in Roofing Curt Liscum, RRC, RRO Benchmark, Inc. Eric Hasselbusch Benchmark, Inc.
3 Questions To ask a question, open the control panel, write your question in the Question and Answer box. Hit Send! Questions will be answered during the Q&A session.
4 Learning Objectives Identify drivers of sustainable roofing Review four key design elements Understand the role of preventive maintenance Learn when and why sustainable roofing may be the right choice
5 Definition - Sustainability* Minimizes the burden on the environment by using the earth s resources responsibly Conserves energy by improving the thermal efficiencies of roofs Extends roof life span by improving long-term performance * International Council for Research and Innovation in Building and Construction
6 Drivers for Sustainable Roofing Existing market Energy Resources utilization Life cycle costs
7 Drivers - Market Potential 2010 NON-RESIDENTIAL ROOFING MARKET New Buildings < 0.5 Billion Sq. Ft. Existing Buildings < 2.5 Billion Sq. Ft. Each building represents 500 million sq. ft. of roofing opportunity
8 Drivers - Energy Why does energy matter? Rooftop PV Rooftop solar thermal Rooftop daylighting Insulation
9 Drivers - Energy Strategic Resource 700 Trillion BTU Potential Roof Energy Savings Annually (NONRESIDENTIAL) Each thermometer above represents 100 trillion BTU of energy savings
10 Drivers - Resources Support sustainability initiatives: Reduce waste/lower landfill costs Increase importance of water management Emphasis on material stewardship
11 Drivers - Durability and Life Cycle Building service life and occupant health/safety Green building guidelines and codes Reduce capital costs at present value Building disaster planning
12 Drivers for Sustainable Roofing Liability Strategic Asset
13 All Too Common Life Cycle High Impact Acquisition Use End Of Life Acquisition End Of Life Use Low Time Reduced service life Accelerated replacement cycle Increased financial and environmental impact
14 Goal: Sustainable Life Cycle Acquisition Planned Maintenance Renewal/Renovation End Of Life High Impact Extended Use Extended Use Low Time Extended service life Planned and orderly replacement cycle Reduced financial and environmental impact
15 Four Key Design Elements Roofing - A Strategic Asset: Energy management Material management Water management Durability/Life cycle management Result: Make Better Decisions
16 Planning and Design Ability to influence cost Project Conception High Delivery Method Design Construction Documents Ability to influence cost Low $ Bidding Construction Facility Management Decommissioning Demolition Time Source: The Project Resource Manual - CSI Manual of Practice
17 Design - Energy Management Questions to consider: What is the best R-value for your building? What is the best roof surface for your building? What are the best roofing practices to save energy? What are the best clean energy options for your building?
18 Design - Energy Management Insulation: Minimum R-Value Minimum R-value Zone 1 ASHRA E 90.1 R-15 ASHRAE 189 (Proposed) R-20 Climate Zones: ASHRAE Standard 169 Zone 2 Zone 3 R-20 R-20 R-25 R-25 Zone 4 R-20 R-25 Zone 5 R-20 R-25 Zone 6 Zone 7 R-20 R-20 R-30 R-35
19 Design - Energy Management Roof surface considerations: Goals - Optimize energy efficiency - Minimize peak energy demand - Reduce heat island effects
20 Design - Energy Management Roof surface considerations: Surface options (vegetative, ballasted, white, black, etc.) Reflected Sunlight Reflected Sunlight Absorbed Sunlight Absorbed Sunlight Options by climate zone
21 Design - Energy Management
22 Design - Energy Management Roofing practices save energy: Top Layer Staggered Top Layer Adhered Bottom Layer Fastened Top Layer Adhered Air Barrier Install roof insulation in multiple, staggered layers Use non thermal bridging techniques to eliminate thermal short circuits Install air barrier to restrict air movement into the roofing system Bottom Layer Fastened Quality control and assurance
23 Design - Energy Management Energy options: Rooftop PV - Many incentives available Rooftop Solar Thermal - Fast payback - Provide for hot water needs Rooftop Daylighting - Fast payback - Excellent retrofit opportunity
24 Design - Energy Management Useful energy tools: DOE Cool Roof Calculator My State Select a state NRCA EnergyWise Online Calculator My City My Proposed Roof R value Solar reflectance, SR [%] Infrared emittance, IE [%] My Energy Costs and Equipment Efficiencies Summertime cost of electricity [$/KWh] Air conditioner efficiency (COP) Select a city Heating fuel cost [$/Therm] Heating system efficiency [fraction] Net Savings [$/ft 2 per year] Cooling Savings [$/ft 2 per year] Heating Savings (Penalty) [$/ft 2 per year] SkyCalc Skylight Design Assistant Free Download DOE Cool Roof Calculator Online Calculator
25 Design - Material Management Questions to consider: What is the best way to reduce material waste? What are the best practices for recycling? What materials can be reused during a project? What options are there for reducing VOC s?
26 Design - Material Management Reduce material waste: Extend functional roof life - Implement maintenance and repair program - Verify system is installed as designed
27 Design - Material Management Recycling and reuse of materials:
28 Design - Water Management Questions to consider: What options are available to reduce storm water runoff and pollution? What impact could water management have on property taxes?
29 Design - Water Management Storm runoff and retention: Iowa State University Design Center Cistern
30 Design - Water Management Property tax credits: Managing water, slowing its flow to reduce the potential for flooding and the runoff of pollutants. - Storm water fees can be reduced through the storm water credits program Minneapolis, MN - Provide a credit system, which can reduce fees by up to 65 percent based on the type of retention system. Marion, IA (Proposed Program)
31 Design - Durability/Life Cycle How can I design my roof to make it more durable? How can I design my roof for lowest cost of ownership? What impact do building codes have on durability and life cycle of roof systems? How can I reduce the risk from natural disasters?
32 Design - Durability/Life Cycle Design Appropriate wind resistance Durable roof insulation and components Proper drainage Protect membrane from roof traffic Reduce moisture damage Accommodate building movement Other design enhancements
33 Design - Durability/Life Cycle Additional considerations: Construction QC Defective membrane Foaming asphalt Rotted wood nailer Removing wet insulation (new)
34 Design - Durability/Life Cycle Additional considerations: Roof Maintenance Program (RMP) The decision not to employ an aggressive roof maintenance program is costing owners between $0.10 and $0.15 per square foot per year. Dennis Firman, P.E., U.S. Air Force (Figures based on his experience with more than 600 million sq/ft of roofing for the US Air Force.). Dick Fricklas co-author of the Manual of Low-Slope Roof Systems Third Edition and Luther Mock a managing partner of Martin Riley and Mock, Inc. a roof consulting firm, authored an article in Roofing Solutions Magazine that detailed an example where an aggressive roof maintenance program reduced annual roofing costs by $17, 573 each and every year over the 20 year study period for a 100,000 square foot roof; or $351, over the life of the roof.
35 Design - Sustainable Life Cycle Acquisition Planned Maintenance Renewal/Renovation End Of Life High Impact Extended Use Extended Use Low Time Make better decisions Extended service life Planned and orderly replacement cycle Reduced financial and environmental impact Your roof is a strategic asset.
36 Guidelines How do I know if I am making a sound roofing decision?
37 Guidelines YOUR ROADMAP TO SUSTAINABLE ROOFS
38 CRITERIA FOR A ROOFPOINT THAT MEETS THE THIS IS TO CERTIFY RECOGNITION ROOF OPTION A: OPTION B: ASSESSMENT SYSTEM Guidelines RoofPoint
39 Guidelines ENERGY Section 1: Energy Management RESOURCES Section 2: Materials Management Section 3: Water Management LIFE CYCLE Section 4: Durability Section 5: Life Cycle Management
40 Guidelines Provides clear direction SECTIONS (KEY SUCCESS AREAS) CREDITS (DETAILED STRATEGIES) REQUIREMENTS (SPECIFIC BENCHMARKS)
41 Become More Sustainable Today Implement a maintenance program Consider RoofPoint as a guide for evaluating sustainable roof designs Develop a quality control process
42 Q & A Dr. James Hoff, DBA Center for Environmental Innovation in Roofing Curt Liscum, RRC, RRO Benchmark, Inc. Eric Hasselbusch Benchmark, Inc.
43 Presenter Contact Information Thank You Curt Liscum, RRC, RRO Benchmark, Inc. Phone: ext. 275 Dr. James Hoff Center for Environmental Innovation in Roofing Phone: Commitment from the ground up Benchmark, Inc. - A Roof and Pavement Consulting Company
44 Insert Poll Question Does your company have sustainability goals related to roofing? Yes No Don t Know
45 Insert Poll Question Which phase of a roofing project provides the greatest opportunity for impacting project costs? Design Construction Quality Control
46 Insert Poll Question What took precedence when making your last roofing buying decision? Initial cost Life cycle cost
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