Envelope Insulation for Sustainable Buildings

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1 Envelope Insulation for Sustainable Buildings Frank O Brien-Bernini Owens Corning VP, Chief Sustainability Officer Macro Trends in the World Population Growth Climate Consciousness Energy shortage Globalisation Technological change Legislation/Policy A perfect storm of global challenges facing us today and lasting for decades 2

2 Sustainability Our Definition Meeting the needs of the present without compromising the world that we leave to the future Adapted from the U.N. World Commission on Environment and Development, in its final document - generally known as the Brundtland Report ( ) 3 Sustainability: Our Strategy Driving to be a net-positive Company 1. Operations Sustainability 2. Product and Supply Chain Sustainability 3. Innovation and collaboration to deliver energy efficiency and durable material solutions at scale 4. Safety, health, employee engagement and community vitality Continuously expand our Handprint, and shrink/overwhelm our Footprint 4

3 Sustainability: Our Strategy Driving to be a net-positive Company 1. Operations Sustainability 2. Product and Supply Chain Sustainability 3. Innovation and collaboration to deliver energy efficiency and durable material solutions at scale 4. Safety, health, employee engagement and community vitality Continuously expand our Handprint, and shrink/overwhelm our Footprint 5 The Role of Building Science Building Science integrates: Heat transfer Air infiltration, solar gains Moisture transport HVAC systems, renewables Indoor air quality Construction methods Operation, occupants and safety Energy, durability, acoustics, comfort Life Cycle Assessments / eco-analysis Structural, wind, fire performance 6

4 Hot versus Cold Climates Country Heating Degree Days Cooling Degree Days USA 2, India 80 3,120 Source: ChartsBin statistics collector team, 2011 The field of Building Science was developed in cold climates Hot climates present different challenges, requiring different solutions Building Science is global solutions must be consistent with India climates7 Renewables are important, but costly To minimize investments, it is important to reduce loads.before installing generation Source: National Renewable Energy Laboratory 8

5 Optimization to Reduce Energy Use BEopt : developed by NREL to optimize building design with respect to energy use Curve shows minimum monthly cost towards Zero Energy (4 th point) Early measures are always energy efficiency related Renewables (usually PV) is employed last, when loads are already minimized Source: National Renewable Energy Laboratory First reduce the loads with energy efficiency, then add renewable generation9 Example of BEopt Simulation Output Source: National Renewable Energy Laboratory 10

6 Insulation in Hot Climates Insulated enclosures are critical for sustainable buildings Insulation is most effective where there are large temperature differences between inside and outside Roofs Industrial, residential, and commercial buildings Walls Industrial, residential, and commercial buildings (Solar gain through windows needs to be properly addressed e.g. shading, orientation ) Insulation is part of a whole building approach to sustainability 11 Single-Ply Roofs: Membrane on Top Mechanically attached or fully adhered single-ply membrane (TPO or PVC) Water-resistant coverboard Extruded Polystyrene (XPS) insulation Vapor retarder (optional) Roof deck 12

7 Single-Ply Roofs: Membrane on Top (2) Mechanically attached or fully adhered single-ply membrane (TPO or PVC) Slipsheet Extruded Polystyrene (XPS) insulation Vapor retarder (optional) Roof deck 13 Protected Roof Membrane Assembly Stone ballast over filter fabric Extruded Polystyrene (XPS) insulation XPS insulation with drainage channels on all 4 bottom edges Separation layer Single-ply waterproofing membrane 14

8 Protected Roof Membrane Assembly: Vegetative Roof Gravel, sand or pedestals over filter fabric Moisture retention fabric Drain board/water retention Extruded Polystyrene (XPS) insulation XPS insulation with drainage Channels on all 4 bottom edges Root block layer Drainage layer Separation layer 15 Wall Insulation: Masonry FEWEIS external façade Masonry Wall + 30mm Insulation Double Wall + air gap + 50 mm insulation There are many options to include insulation to masonry walls 16

9 Wall Insulation: Examples FEWEIS Insulation in Cavity Wall 17 Wall Insulation: Location Externally In the wall Internally Different locations for the insulation are possible depending on the project18

10 Integrated Wall Insulation Extruded Polystyrene (XPS) Insulation Thermomass system CIP Concrete forming system Insulation can be integrated in cast-in-place concrete walls 19 Integrated Wall Insulation (2) Extruded Polystyrene (XPS) Insulation Thermomass system SC Extruded Polystyrene (XPS) Insulation Water vapor and capillary break Extruded Polystyrene (XPS) Insulation We can create a structurally-composite sandwich insulated wall 20

11 Integrated Wall Insulation (3) Lift insert Extruded Polystyrene (XPS) Insulation Thermomass system NC Non-composite insulated concrete sandwich walls: concrete layers work independently of each other 21 Conclusions Macro trends are demanding more sustainable buildings Sustainable building design must be climate specific Significantly reduce loads then consider renewables Envelope insulation is typically early on the BEopt path There is great design flexibility, and proven solutions, for adding insulation to masonry roofs and walls Advance sustainability with your purchasing decisions Recognize the sustainability attributes of the supplier and their products Owens Corning s goal is to become a Net-Positive company 22

12 Questions? Copyright 2013 Owens Corning. All Rights Reserved. 23