Sustainability in Roofing. Sika Solutions Proven Competence
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- Rosa Heath
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1 21 Sustainability in Roofing Sika Solutions Proven Competence
2 Sika Solutions Contribute to a Sustainable Future 2
3 Sika is committed to putting high-performance solutions into practice to the benefit of our customers and for a sustainable development. In a marketplace that faces challenges such as higher costs for raw materials and energy, faster growth in emerging economies and growing global competition, it is vital to be able to innovate. Since its foundation in 191, Sika has shown this ability repeatedly and will accelerate in doing so. It is in this interest that we invest in research. In the future, this approach will remain crucial to our success, and we will anticipate and respond strongly to major challenges ahead such as energy and resource efficiency, climate change, water scarcity, efficient infrastructure and air quality. These challenges demand new solutions which are directly linked with our company s growth. Consequently we need to ensure that sustainability is integrated effectively into our management and business methods, our research and development strategy, marketing and sales activities, production processes and into our collaboration across company lines. As a company with a strong innovative tradition, Sika not only develops creative solutions, we also engage in sharing this tradition across company lines with our partners in trade and industry. It is in this respect that we engage in the following programs: Content What Is Life Cycle Assessment and How Can I Measure It? The Sika Life Cycle Approach The Sika Contribution to Sustainable Construction The Sika Life Cycle Approach to Roofing Descriptions of Roofing Systems Covered in the LCA s LCA Results for Cumulative Energy Demand (CED) LCA Results for Global Warming Potential (GWP) LCA Results for Photochemical Ozone Creation Potential (POCP) Conclusions from the LCA Results Saving Energy Thermal Insulation Saving Energy Solar Reflective Roofs Generating Energy Sika SolaRoof The Advantages Are Growing Sika Green Roofs Durability Performance for Decades Recycling Closing the Material Cycle VOC in Roofing Innovative VOC Free Roofing Solutions Sika Roofing Solutions Contribute to a Sustainable Future Overview of Green Building Certification Programs
4 What Is Life Cycle Assessment and How Can I Measure It? What is Life Cycle Assessment (LCA) and why is it relevant? Life Cycle Assessment (LCA) is a standardized method to assess and compare the inputs, outputs and potential environmental impacts of products and services over their life cycle. LCA's are increasingly recognised as the tool to evaluate the sustainability of products and systems. What are the steps to prepare an LCA? Goal and scope definition Inventory analysis Defining the product system, functional unit, system boundaries, assumptions and impact assessment methodology Collection of data to quantify relevant inputs and outputs of the product system Impact assessment Association of inventory data with impact categories Interpretation What impact categories and resource indicators are included in an LCA? There are several different impact categories and resource indicators which can be assessed with different methods. The impact categories and resource indicators to be presented according to the Standard EN 1584 Sustainability of construction works Environmental product declarations "Core rules for the product category of construction products", include the following: Cumulative Energy Demand (CED) Cumulative Energy Demand (CED) accounts for the consumption of energy resources, namely the total amount of primary energy from renewable and non-renewable resources. Global Warming Potential (GWP) Global Warming Potential (GWP) measures the potential contribution to climate change, focusing on emissions of greenhouse gases, such as carbon dioxide (CO 2 ), which enhance the heat radiation absorption of the atmosphere, causing the temperature at the earth s surface to rise. 4
5 What impact categories and resource indicators are included in an LCA? (continued) Photochemical Ozone Creation Potential (POCP) Photochemical Ozone Creation Potential (POCP), or summer smog, is the formation of reactive chemical compounds, e.g., ozone, by the action of sunlight on volatile organic compounds (VOC) and nitrous oxides (NO x ). It is common in large cities, where high amounts of VOC and NO x are released (e.g., industrial and automobile emissions), especially during summer when there is more sunlight. Summer Smog may be harmful to human health and ecosystems. Use of Net Fresh Water The use of net fresh water accounts for the consumption of fresh water (e.g., feed water, ground water, lake water, river water, surface water, water with river silt). Eutrophication Potential (EP) Eutrophication is the excessive enrichment of aquatic or terrestrial ecosystems with nutrients, nitrogen and phosphorus being the most important, which may cause an adverse shift in species composition and biomass production. Acidification Potential (AP) The acidification potential describes the conversion of air pollutants, such as sulphur dioxide (SO 2 ), into acids, which have a wide variety of impacts (e.g., in form of acid rain) on soil, water, organisms and materials. Ozone Depletion Potential (ODP) Ozone depletion refers to the degradation of the ozone layer due to anthropogenic emissions, such as chlorofluorocarbons (CFCs). This allows a greater fraction of UV-B radiation to reach the earth s surface, with potentially harmful impacts on human health, organisms and materials. Abiotic Depletion Potential (ADP elementary and ADP fossil) Abiotic resources are natural resources such as minerals, iron ore, crude oil and wind energy. The ADP elementary impact category includes all non renewable, material resources, while the ADP fossil category includes all fossil resources, including feedstock. Are Carbon Footprint and Global Warming Potential (GWP) the same? Yes, the Carbon Footprint is the sum of the total greenhouse gases emitted (directly and indirectly) expressed in kg CO 2 -equivalents. GWP is the corresponding impact category of an LCA. 5
6 The Sika Life Cycle Approach On what standards are Sika LCA s based? Sika carries out LCA s according to the ISO 144 series and the Standard EN The impact assessment methodology used is CML 21. Where does the Sika LCA data come from? The data for the Sika LCA is based on public databases, such as those from ecoinvent, the European Reference Life Cycle Database (ELCD) and PE-GaBi, plus the specific data from Sika production plants and products. Which life cycle phases are included in these Sika LCA s? Natural resources Waste Raw materials Production End-of-life Cradle to Gate Cradle to Grave Use and maintenance Application What does Cradle to Gate mean? In a "Cradle to Gate" approach, the LCA investigates the potential environmental impact of a product from raw material extraction to finished production. What does Cradle to Grave mean? In a "Cradle to Grave" approach, the LCA investigates the potential environmental impact of a product from raw material extraction, production, application and use to final disposal at the end-of-life. 6
7 The Sika Contribution to Sustainable Construction How can the Sika LCA data be used / interpreted? How can Sika contribute to sustainable construction? The LCA can greatly assist our customers in evaluating Sika s products and systems namely by providing quantitative data on their environmental profile. This enables the differentiation of products that may have similar performance, but greater differences concerning their environmental impact where obviously the lower, the better. Sika evaluates its products systematically with regard to all of the major challenges and based on regular and fully comprehensive Life Cycle Assessments. Energy efficiency solutions Sika products and systems which contribute to reducing the energy demand over the entire value chain. Resource efficiency solutions Sika products and systems which contribute to reducing the resource demand over the entire value chain. Climate protection solutions Sika products and systems which contribute to reducing the carbon emissions over the entire value chain. Water efficiency solutions Sika products and systems which contribute to reducing the water demand over the entire value chain. Air quality solutions Sika products and systems which contribute to reducing summer smog and the emission of air pollutants and hence improve the well-being of people and ecosystems over the entire value chain. 7
8 The Sika Life Cycle Approach to Roofing The Sika Roofing Life Cycle Approach Which impact categories and resource indicators are most relevant for roofing? As a standard approach, Sika evaluates all impact categories and resource indicators deemed as important according to the relevant standards. For Roofing Cumulative Energy Demand (CED), Global Warming Potential (GWP), and Photochemical Ozone Creation Potential (POCP) are considered to be most relevant. Others, such as Use of Net Fresh Water are less significant for Roofing and hence not included in this publication. Which life cycle phases are most relevant for roofing? From a Cradle to Gate perspective, the majority of the potential impacts are connected to the raw materials A that are used to produce B the roof waterproofing layer and the other roofing system components. From a Cradle to Grave perspective, the use phase D and the end-of-life phase E, have the most significant influence on the overall sustainability performance of roofing applications, due to their A contributions to save and / or create energy, to avoid carbon emissions and to save resources B at the end-of-life. The leverage of all of these E potential benefits is a long lasting functionality and durability. D C What is included in the Sika roofing LCA s? The LCA data in this brochure refers to 1 m 2 of the roofing systems/membrane and is either based on a cradle to gate, or on a cradle to grave approach 1). Who performed and reviewed the Sika roofing LCA s? The Sika Roofing LCA s have been performed internally by the Sika Corporate Product Sustainability Group, using the state of the art GaBi software from PE International. The LCA model was reviewed by the leading independent research institute Swiss Federal Laboratories for Materials Science and Technology (EMPA). 1) In the LCA's, neither the roof construction (steel deck, concrete deck, soil, plants etc.), nor capital goods (e.g. machinery) were considered. 8
9 How Can Sika Roofing Systems Contribute to Sustainable Construction? A B Raw material and production: Energy and resource efficient roofing systems: Sika provides roofing systems that use less energy and resources by comparison with competitive technologies. Climate protection roofing solutions: Sika provides roofing systems with a low Global Warming Potential. This means a reduced Carbon Footprint. C Application: Air quality roofing solutions: Sika can provide low Volatile Organic Compound (VOC) and VOC-free roofing options, which help to avoid summer smog. D Use and maintenance: Saving energy: Sika roofing systems can save energy by incorporating high performance thermal insulation. Saving energy: Sika solar reflective membranes help save energy by increasing the albedo and as a consequence reducing the cooling energy demands and contributes to the reduction of the urban heat island effect. Generating energy: Sika SolaRoof systems allow you to produce energy right on top of your roof, whilst Sika solar reflective membranes also improve photovoltaic panel efficiency. Improving the microclimate: Sika green roofing systems help to improve the microclimate and to mitigate the development of urban heat islands and help mange water run-off from roofs. E End-of-life: Recycling: Recycling at the end-of-life means closing the material cycle which allows the saving resources. 9
10 Descriptions of Roofing Systems Covered in the LCA s Mechanically Fastened Roofs Design / Build-up Thermoplastic membrane / PIR System Design / Build-up System FPO membrane EPDM 1.5 mm / PIR EPDM 1.5 mm mechanically Sarnafil TS fixed with fasteners and mechanically fixed with washers Sarnafast SF 4,8 mm PIR insulation 135 mm and Sarnafast Vapour control layer Washer KT PE.3 mm PIR insulation 135 mm Steel deck Vapour control layer Sarnavap 2 E Steel deck Thermoplastic membrane / PIR PVC membrane 2-layer metal / PIR Top layer metal panel, steel Sikaplan 15 G Fixings and spacers mechanically fixed with PIR insulation 135 mm Sarnafast SF 4,8 mm Base layer metal panel and Sarnafast Washer KT PIR insulation 135 mm Vapour control layer Sarnavap 2 E Steel deck Bitumen 1-layer / PIR 1-layer modified bitumen 5.2 mm, mechanically fixed with fasteners and washers PIR insulation 135 mm Vapour control layer PE.3 mm Steel deck LCA comparison of popular roofing systems and technologies: in order to allow correct comparison, the comparison of all of the roofing systems is based on the same thermal insulation type (PIR/PUR boards), with the same thermal resistance (R D = 5 (m 2 K) / W). The only exception is the SikaRoof MTC Green (inverted roof), which includes extruded polystyrene (XPS) thermal insulation for technical reasons. 1
11 Adhered Roofs Design / Build-up Thermoplastic membrane / PIR System Green Roofs Design / Build-up System FPO membrane Thermoplastic membrane / PIR Soil with plants Sarnafil TG Felt Drainage layer Sarnavert adhered to the insulation with Aquadrain 55 Sarnacol 2142 S FPO membrane PIR insulation 135 mm bonded Sarnafil TG to the vapour control layer with PIR insulation 135 mm Sarnacol 2162 Vapour control layer mod. Self adhesive vapour control bitumen 3,5 mm layer Concrete deck Sarnavap 5E SA Concrete deck Thermoplastic membrane / PIR PVC membrane Thermoplastic membrane / PIR Soil with plants Sarnafil G EL Drainage layer Sarnavert Felt adhered to the insulation Aquadrain 55 with Sarnacol 217 PVC membrane PIR insulation 135 mm bonded Sarnafil G to the vapour control layer with PIR insulation 135 mm Sarnacol 2162 Vapour control layer mod. Self adhesive vapour control bitumen 3,5 mm layer Concrete deck Sarnavap 5E SA Concrete deck PU liquid applied membrane (LAM) / PIR SikaRoof MTC Cold Fusion PU liquid applied membrane SikaRoof MTC Green Top coat Sikalastic -621 TC (LAM) / XPS Soil with plants Reinforcement with Sika Drainage layer Sarnavert lastic Reemat Premium m Aquadrain 55 Base coat XPS insulation 185 mm Sikalastic -61 BC Top coat Sikalastic -621 TC Sikalastic Carrier Reinforcement Sikalastic PIR insulation 135 mm bonded Reemat Premium to the VC layer with Base coat Coldstick Sikalastic -61 BC Control layer Sikalastic Vap Sikalastic Carrier Membrane adhered with Coldstick adhered with Coldstick Concrete deck Concrete deck Bitumen 2-layers / PIR 2-layers modified bitumen Bitumen 2-layers / PIR Soil with plants (5. and 3.5 mm) Drainage layer PIR insulation 135 mm bonded 2-layers modified bitumen to the vapour control layer with (5. and 3.5 mm) adhesive PIR insulation 135 mm Vapour control layer mod. Vapour control layer mod. bitumen 2.7 mm Primer Concrete deck bitumen 2.7 mm Concrete deck 11
12 LCA Results for Cumulative Energy Demand (CED) Challenge: The demand for limited resources is increasing. Worldwide the demand for resources including oil, coal, natural gas, iron ore and copper is increasing, driven by a growing population and higher spending and purchasing powers. On the other hand, these resources are limited, or their extraction is getting more and more costly. Efficient and intelligent use of limited resources is one of the main challenges for future growth. LCA Results for Popular Roofing Systems 1) Cumulative Energy Demand (CED) for 1 m 2 roofing system [MJ/m 2 ] 12 1 Cradle to Gate Thermoplastic Bitumen EPDM 2-layers Thermoplastic PU LAM Bitumen Thermoplastic PU LAM Bitumen membrane 1-layer membrane metal membrane PIR 2-layers membrane XPS 2-layers PIR PIR PIR PIR PIR PIR PIR PIR Mechanically Fastened Roofing System Adhered Roofing System Green Roofing System Green layers Waterproofing layer Reinforcement (LAM) Fasteners / Adhesives Insulation Vapour control layer Carrier layer (LAM) Primer You can contribute to saving energy and resources by choosing Sika roofing solutions that: Have the lowest CED of all of the roofing systems compared (Energy & Resource Efficiency Solutions) Have a wide range of both sustainable and cost effective roofing systems to match your requirements Provide superior durability, together with additional benefits in the use phase 1) LCA values may vary, depending on the products formulation (e.g. due to local fire regulations) and production site, as well as on the datasets from the available LCA databases. The values for the thermoplastic roof build-ups are based on the average of the two systems described for the corresponding application. 12
13 LCA Results for Global Warming Potential (GWP) Challenge: The climate is changing faster than ever before. The earth s climate is changing faster than ever before. The consequences are manyfold and affect us all. Climate protection is one of the most important tasks for the future. By 25 the world will have to reduce its greenhouse gas emmissions by 8%. To act now is crucial, because a complete overhaul of currently used energy systems needs to be financed and realized within less than two generations. Decisive action is needed urgently. LCA Results for Popular Roofing Systems 1) Global Warming Potential (GWP) for 1 m 2 roofing system [kg CO 2 -eq./m 2 ] Cradle to Gate Thermoplastic Bitumen EPDM 2-layers Thermoplastic PU LAM Bitumen Thermoplastic PU LAM Bitumen membrane 1-layer membrane metal membrane PIR 2-layers membrane XPS 2-layers PIR PIR PIR PIR PIR PIR PIR PIR Mechanically Fastened Roofing System Adhered Roofing System Green Roofing System Green layers Waterproofing layer Reinforcement (LAM) Fasteners / Adhesives Insulation Vapour control layer Carrier layer (LAM) Primer You can contribute to protecting our climate by choosing Sika roofing solutions that: Have the lowest GWP of all of the roofing systems compared (Climate Protection Solutions) Have a wide range of both sustainable and cost effective roofing systems to match your requirements Provide superior durability, together with additional benefits in the use phase 1) LCA values may vary, depending on the products formulation (e.g. due to local fire regulations) and production site, as well as on the datasets from the available LCA databases. The values for the thermoplastic roof build-ups are based on the average of the two systems described for the corresponding application. 13
14 LCA Results for Photochemical Ozone Creation Potential (POCP) Challenge: Improve air quality and maintain a safe environment. Photochemical Ozone Creation Potential (POCP), or summer smog, is the formation of reactive chemical compounds, e.g., ozone, by the action of sunlight on volatile organic compounds (VOC) and nitrous oxides (NO x ). It is common in large cities, where high amounts of VOC and NO x are released (e.g., industrial and automobile emissions), especially during summer when there is more sunlight. Summer Smog may be harmful to human health and ecosystems. The well-being of humans and ecosystems needs to be ensured. LCA Results for Popular Roofing Systems 1) Photochemical Ozone Creation Potential (POCP) for 1 m 2 roofing system [kg C 2 H 4 -eq./m 2 ].3.25 Cradle to Gate Thermoplastic Bitumen EPDM 2-layers Thermoplastic PU LAM Bitumen Thermoplastic PU LAM Bitumen membrane 1-layer membrane metal membrane PIR 2-layers membrane XPS 2-layers PIR PIR PIR PIR PIR PIR PIR PIR Mechanically Fastened Roofing System Adhered Roofing System Green Roofing System Green layers Waterproofing layer Reinforcement (LAM) Fasteners / Adhesives Insulation Vapour control layer Carrier layer (LAM) Primer You can contribute to reducing the summer smog by choosing Sika roofing solutions that: Have the lowest POCP of all of the roofing systems compared (Air Quality Solutions) Provide superior durability, together with additional benefits in the use phase Use VOC free adhesive options (e.g., Sika waterbased adhesive) 1) LCA values may vary, depending on the products formulation (e.g. due to local fire regulations) and production site, as well as on the datasets from the available LCA databases. The values for the thermoplastic roof build-ups are based on the average of the two systems described for the corresponding application. 14
15 Conclusions from the LCA Results Conclusions from the LCA Results for Popular Roofing Systems: Cradle to Gate Energy efficiency solutions Sika roofing systems based on thermoplastic PVC and FPO single ply membranes have a lower Cumulative Energy Demand (CED) than other roofing technologies. This holds true for mechanically fastened, adhered as well as for green roofing systems. You can contribute to saving energy by choosing high performance and low impact Sika roofing systems. Resource efficiency solutions Same as Energy Efficiency, Resource Efficiency is measured by the Cumulative Energy Demand (CED). Sika roofing systems based on thermoplastic PVC and FPO single ply membranes have a lower Cumulative Energy Demand (CED) than other roofing technologies and classify as Resource Efficiency Solutions. Climate protection solutions Sika thermoplastic PVC and FPO single ply roofing systems have a lower Global Warming Potential (GWP) compared to the other roofing technologies. This means a reduced Carbon Footprint for a solution that is here to last. Air quality solutions Sika roofing systems based on thermoplastic PVC and FPO single ply membranes have a distinctly lower Photochemical Ozone Creation Potential (POCP) than the other roofing technologies compared. This means reduced summer smog potential. You can contribute to preventing summer smog by choosing high performance and low impact Sika roofing systems. 15
16 Saving Energy Thermal Insulation High Performance Thermal Insulation Thermal insulation is the key to creating a comfortable environment inside of a building. At the same time, it is also the key to saving energy. Sika provides a wide range of thermal insulation specially designed and manufactured for optimal performance as part of the Sika roofing systems. Global Warming Potential (GWP) and thickness of different insulation materials to provide a thermal resistance of R D = 5 (m 2 K) / W 1) Global Warming Potential (GWP) [CO 2 -eq./m 2 ] Cradle to Gate Mineral Wool EPS XPS PIR,38 W / (m K),36 W / (m K),37 W / (m K),27 W / (m K) d d d d Thickness [cm] Global Warming Potential (GWP) [CO 2 -eq./m 2 ] Thickness [cm] Thermal insulation performance: expanded polystyrene (EPS) materials have the lowest Global Warming Potential (GWP) for a given thermal performance, whilst mineral wool based systems have the highest GWP, but they have the advantage of being non-combustible. Polyisocyanurate (PIR) materials have the best thermal performance for a given thickness of insulation. 1) Corresponds to U-value ~,2 W / (m 2 K), a typical value for central Europe 16
17 Saving Energy Solar Reflective Roofs Sika Takes Solar Reflectivity to a New Level The benefits of solar reflective materials and colours are well known and understood, especially in warm climates around the world. With urban density increasing, the heat island effect is also impacting on cities at an ever increasing rate. White highly reflective membranes dramatically increase reflectivity and reduce both the heat island effect and the cooling energy consumption requirements for buildings. Sika roofing systems include highly reflective, white, thermoplastic membranes with an initial reflectivity SRI = 111% (Solar Reflectance Index) and PU liquid applied membranes with a similar SRI = 11% contributing to your Green Building Certification rating. Break-even diagram showing the carbon costs of a roofing system: Global Warming Potential (GWP) [kg C 2 -eq./m 2 ] Cradle to Grave 1 18 Carbon costs roof build-up 6 Carbon savings during use phase Years Roof build-up: Thermoplastic Sarnafil S EL traffic white 916 SR, mineral wool with R D = 2 (m 2 K) / W, vapour barrier 1) Case study of a project in Seville, Spain: this example compares a roof build-up with the highly refl ective Sarnafil S EL SR membrane (initial refl ectivity SRI = 111%) to a black roofi ng membrane. After a period of less than two years, the CO 2 that was spent for raw materials, production, installation and end-of-life, is compensated by the CO 2 saved due to reduced cooling energy demands inside the building. 1) End-of-life scenario: recycling for membrane, landfill for mineral wool, incineration for vapour barrier 17
18 Generating Energy Sika SolaRoof Sika Solar Park, Stuttgart, Germany Sika SolaRoof Systems and Services for Rooftop Solar Applications The importance of rooftop solar applications was recognized early by Sika, because its Solar Reflective (SR) membranes can increase the performance of Photovoltaic (PV) panels. Sika now maintains our own Solar Parks in several locations using different technologies to: Monitor the energy yield of different PV technologies Collect first-hand experience about their long term performance Showcase the flexibility of Sika roofing systems in conjunction with PV applications Provide a platform for our PV technology partners and other interested parties Break-even diagram showing the carbon costs of the roofing and the PV system: Global Warming Potential (GWP) [kg CO 2 -eq./ 236 m 2 ] 25' 2' 15' 1' Cradle to Grave Carbon costs roof build-up and PV system Carbon savings during use phase by PV system 5' Years Roof build-up: cylindrical CIGS PV panels, thermoplastic Sarnafil TS 77-2 E traffic white 916 SR, mineral wool with R D = 3 (m 2 K) / W, vapour barrier 1) Case study at the Sika Solar Park in Stuttgart, Germany (236 m 2 roof area): the example shows that after only 3 years, the cumulative CO 2 savings by the Photovoltaic (PV) system are higher than the CO 2 that was used for the raw materials, production and installation of both the roof build-up and the PV system. Sika's SR membranes significantly increase the PV panel s efficiency and thus contribute to reducing the carbon payback time. 1) End-of-life scenario: recycling for membrane and PV system, landfill for mineral wool and vapour barrier 18
19 The Advantages Are Growing Sika Green Roofs A Natural Habitat on Your Roof The addition of a green roof to an otherwise unused area of a building is beneficial for the surrounding environment and can contribute to your Green Buidling Certification rating. Initial loss of green space and its inherent natural processes like photosynthesis are restored, now just a few stories higher. But green roofs also have other benefits that you might not be aware of: Storm-water retention During heavy rainfall, run-off from hard / dense surfaces such as pavements and rooftops can cause serious problems such as sewers overflowing and fresh water pollution. Green roofs slow down this water flow by retaining up to 75% of the rainwater, thus alleviating the pressure on storm water and drainage infrastructure. Reducing the urban heat island effect More green roofs and fewer dark coloured roofs equal a cooler city. Dark roofs retain heat whilst plants naturally cool the surrounding environment through their evapotranspiration cycles. In cities where the ambient temperature can be up to 1 degrees hotter than in the surrounding rural areas, green roofs can help to bring the overall temperature down thus contributing to a healthier micro-climate. Reducing energy consumption Green roofs are also great insulators and can very significantly lower a building s cooling energy consumption and costs, particularly in the summer months. Improving air quality Green roofs filter air by absorbing and converting carbon dioxide to oxygen. 19
20 Durability Performance for Decades Victorinox headquaters, Switzerland, Sarnafil S327, 1978 Investing in Quality Means Saving More and for Longer The durability of building materials is a key driver for sustainable building construction. Internal and external studies have documented the outstanding service life of Sarnafil and Sikaplan roofing systems. As an example, "The British Board of Agrément (BBA)", certifies thermoplastic Sarnafil G/S 1.5 mm membranes to have a life expectancy that is "in excess of 4 years". On the other hand, SikaRoof MTC liquid membranes are an outstanding refurbishment solution, allowing to extend the lifetime of existing roofs. They may simply be applied over the waterproofing layer, as they are compatible with most existing roofing mate rials.at the end of the life expectancy they may also be simply recoated to extend the service life even further. Investing into quality is a smart choice it means saving more and for longer: saving costs as well as saving energy and resources due to fewer replacements and less maintenance of the roofing system over time. Global Warming Potential (GWP) of two thermoplastic roofing membranes with different service life [kg CO 2 -eq./m 2 ] 6 5 Carbon costs of a Carbon long lasting roofing savings 4 membrane Carbon costs of a 3 short-lived roofing membrane 2 Carbon savings 1 Cradle to Grave Years Case study of the comparison between long lasting and short-lived roofing membranes for a building over a period of 5 years: this study is based on the assumption that a short-lived generic waterproofing membrane lasts 1 years on average and hence will be replaced four times over the course of 5 years, whilst a high quality Sika roofing membrane lasts 25 years and only needs to be replaced once 1). 1) End-of-life scenario: incineration 2
21 Recycling Closing the Material Cycle Recycling the Smart Choice Recycling of production waste: Sika has been recycling production waste and roll edge trimmings since the 196 s. Recycling of post-consumer waste (end-of-life): Sika was a pioneer in the development of recycling for used roofing membranes and actively participates in the end-of-life recycling program ROOFCOLLECT, the European collection and recycling initiative for roofing and other waterproofing membranes. In the US, Sika has successfully introduced a recycling program for commercial roofing membranes. Innovative products made from recycled materials: production waste and post-consumer membranes are recycled into new products, such as protection sheets and walkway pads. Global Warming Potential (GWP) of three end-of-life scenarios for a Sika thermoplastic PVC membrane [kg CO 2 -eq./m 2 ] Cradle to Grave Recycling Incineration Landfi ll Carbon costs end-of-life of the membrane Carbon costs to produce and install the membrane Carbon credits end-of-life of the membrane Case study for three end-of-life scenarios: three end-of-life scenarios were modelled for a mechanically fastened Sika thermoplastic PVC membrane: recycling (through shredding and regranulation), incineration and landfill. The results show that recycling is clearly the best solution, giving credits for avoiding additional raw materials that are almost as high as the original costs for production and installation of the membrane. Incineration generates additional CO 2, even if there are credits to be gained from using the incineration as a source of energy. 21
22 VOC in Roofing The Sika Responsibility for Health & Environment Sika is a responsible company and takes your health and safety seriously Traditionally one of the major risks the roofing industry faces is the danger associated with using open flames during installation on-site. Gas torches, bitumen boilers, etc., all present such a fire hazard that many authorities and owners, together with their insurance companies, are now banning the use of flame applied systems on their roofs. Sika roofing systems are all developed as no flame applications and hence are completely free of such risks. What are VOC s? VOC is the standard abbreviation for Volatile Organic Compounds chemicals with a significant vapour pressure. While VOC s are typically not always toxic, they can frequently have a potentially negative long term health impact and may also have an adverse effect on the environment. Why do some products contain solvents (VOC)? VOC s are contained in solvents that are commonly used in many products, such as paints or adhesives. The solvents are used so that the product can be supplied in a liquid form to facilitate its application on the surface. During the application and for a short period afterwards, the solvent will evaporate as a result of the materials drying and curing process. Solvent containing products offer benefits in the application during cold weather. Health & Safety during application Sika roofing products are all designed for outdoor application. Any product with a VOC content are designed to allow this to evaporate during application, where the free movement of air across the rooftop disperses the VOC rapidly. Sika products are compliant with the latest Health & Safety regulations 1). Furthermore, independent studies conclude that the exposure to solvents during application remain well below the allowed workplace exposure levels. The application of VOC containing Sika products is therefore safe when carried out in accordance with the materials application guidelines and the Product Data Sheets 2). Low VOC and VOC free roofing solutions Innovative since its foundation 1 years ago, Sika has developed low VOC and VOC free roofing systems for markets and customers who want to avoid any products containing such solvents. 1) Exceptions may apply. Please refer to the Product Data Sheets or your local Sika organization. 2) Local health and safety regulations must be followed. For further information please refer to the Product Data Sheets or your local Sika organization. 22
23 Innovative VOC Free Roofing Solutions Examples of VOC Free Sika Roofing Adhesives Innovative since its foundation 1 years ago, Sika offers a number of low VOC and VOC free roofing options for bonding thermal insulation and membranes to the substrates. Membrane adhesives Sarnacol waterbased adhesive Sarnacol waterbased contact adhesive for thermoplastic Sarnafil and Sikaplan PVC 1) membranes VOC free Suitable for most of the common substrates on roofs Efficient and clean application Sarnacol VOC free spray adhesive for upstands with thermoplastic Sarnafil FPO membranes 1) VOC free Efficient and clean to apply Adhesive can be reactivated Sarnacol hot melt adhesive and spray tool Thermal insulation adhesives Sikalastic two component adhesive 1) VOC free Efficient and clean application Sikalastic insulation adhesive 1) Please check the availability of the above mentioned adhesives with your local Sika organization. 23
24 Sika Roofing Solutions Contribute to a Sustainable Future Sika Sustainable Roofing Solutions Energy efficiency solutions Cradle to Gate: the LCA's performed show that Sika thermoplastic PVC and FPO roofing systems have the lowest Cumulative Energy Demand (CED) of all of the roofing systems compared. Cradle to Grave: highly reflective, mechanically fastened thermoplastic Sarnafil membranes provide energy savings during the use phase. Furthermore, the roof build-up can be dismantled and recycled at the end-of-life. Cradle to Grave: Sika green roofing systems combine a relative low Cumulative Energy Demand (CED) from the raw material and production phase with additional benefits in the use phase, including reducing the energy consumption and the urban heat island effect. Resource efficiency solutions Sika thermoplastic PVC and FPO membranes use fewer resources than competitive technologies in fact replacing mass by technology, thereby providing much higher performance per mm of the waterproofing layer. SikaRoof MTC liquid applied membranes provide a new life to existing roof structures and upon reaching the life term of MTC systems (with a simple recoating), therefore reducing the resource demand for refurbishment. Climate protection solutions Cradle to Gate: the LCA's performed show that Sika thermoplastic PVC and FPO roofing systems have the lowest Global Warming Potential (GWP) of all of the roofing systems compared. This means a reduced Carbon Footprint for a solution that is here to last. Cradle to Grave: the best performance with regard to GWP is achieved by a high-quality Sika solution that has a superior service life. Fewer replacements of the roofing system being required over time means saving costs as well as reducing the Carbon Footprint of your building. Cradle to Grave: adding a Photovoltaic system to your roof may allow you to achieve a positive CO 2 balance within a few years. Air quality solutions Cradle to Gate: Sika provides roofing systems with a low POCP notably Sika thermoplastic PVC and FPO mechanically fastened roofing systems as well as Sika thermoplastic PVC and FPO green roofing solutions. With regard to the on-site application phase, Sika has innovative VOC free and low VOC solutions. This means reducing the summer smog potential and improving the air quality. 24
25 Sika Sustainable Roofing Solutions Sika thermoplastic PVC and FPO mechanically fastened roofing systems Low energy and resource demand from the raw material and production phase Very low GWP low Carbon Footprint High reflectivity helps reducing cooling energy demand and can contribute to your Green Building Certification rating Superior durability means replacing fewer times and as a result saving costs, energy and CO 2 Roof build-up is easy to dismantle at the end-of-life and therefore unproblematic to recycle Sika green roofing systems Low energy and resource demand from the raw material and production phase Very low GWP low Carbon Footprint Green roof build-up contributes to saving cooling energy, reduces the urban heat island effect and can contribute to your Green Building Certification rating Excellent durability means replacing fewer times and as a result saving costs, energy and CO 2 Sika thermoplastic PVC and FPO roofing systems using VOC free adhesives Low energy and resource demand from the raw material and production phase Low GWP low Carbon Footprint High reflectivity helps reducing cooling energy demand and can contribute to your Green Building Certification rating Innovative, solvent free Sika adhesives result in a virtually VOC free roof build-up. This means reducing the summer smog potential and improving the air quality. No penetration of the roof deck High aesthetic appearance 25
26 Overview of Green Building Certification Programs Green Globes Canada LEED USA Green Globes USA Over the recent years, several countries and organisations developed environmental certification programs for buildings. Practical experiences as well as new findings have been leading to adaptations and extensions of the programs. The criteria of the programs are similar while the evaluation differs substantially. Most Green Building Certification Programs focus on assessing whole buildings rather than building products. However requirements for individual product categories are also included in several programs (e.g. VOC content, SRI Solar Reflectance Index). LCA allows to accurately characterize products and systems in terms of sustainability performance. For specific information regarding the various Certification Programs, please contact your local Sika organization. LEED (Leadership in Energy and Environmental Design) LEED is the world s best known green building certification system. It was developed in 2 by the USGBC (US Green Building Council) and is most relevant for North America, but is also used in many other regions around the world, such as South America, Europe and Asia. It is based on a set of rating systems where specific topics are assessed, such as transportation, recycling content, etc. The curent LEED program is not LCA based. How can Sika Roofing Systems contribute to your LEED certification? Sika Sarnafil s EnergySmart Roof membranes and Green Roof systems can contribute to multiple points in LEED s Sustainable Sites category. This is done by replacing natural landscape removed in the construction process with a green (vegetated) roof, controlling stormwater runoff and helping reduce the heat island effect. Credit 6.1 Stormwater Design Quantity Control 1 point Credit 7.2 Heat Island Effect Roof 1 point For further details, please contact Sika US or visit BREEAM UK HQE France DGNB Germany BREEAM (BRE Environmental Assessment Method) BREEAM is an environmental assessment method and rating system for buildings, launched in 199 by the British organisation BRE (Building Research Establishment). It is also used in other countries such as Netherlands and Spain. BREEAM assesses the overall performance of buildings using factors such as energy and water use, the internal environment (health and well-being), pollution, transport, materials etc., awarding credits in each area according to performance. The environmental impact is determined by using LCA. How can Sika Roofing Systems contribute to your BREEAM certification? Sika roofing systems achieve low Ecopoint scores and can provide excellent contributions towards BREEAM ratings, demonstrated by an A+ rating in the BRE Green Guide for Construction and Code for Sustainable Homes. For further information, please contact Sika UK or visit DGNB (Deutsches Gütesiegel für Nachhaltiges Bauen) The DGNB Certification System was developed by the German Sustainable Building Council (DGNB) and the German Government in 29 and several country adaptations are under preparation. It is based on several criteria within 6 topics, among which are Ecological Quality, Economical Quality and Technical Quality. For the Ecological Quality topic, LCA data is required. As a basis for data communication, Environmental Product Declarations (EPD s) are used. How can Sika Roofing Systems contribute to your DGNB certification? Sika roofing systems were among the first roofing systems to be included in the DGNB Navigator (July 211). EPD s are available. For further information, please contact Sika Germany or visit 26
27 How can Sika Roofing Systems contribute towards your Green Building Certification rating? CASBEE Japan Green Star Australia Sika roofi ng systems contribute to multiple points in most Green Building Certifi cation programs. This is done by: Choosing Sika climate protection solutions Replacing natural landscape removed in the construction process and Controlling stormwater runoff with a Sika green roof Reducing the heat island effect with a highly refl ective Sika roofi ng system Using high performance thermal insulation HQE (Haute Qualité Environnementale) The HQE is the French environmental quality management approach for construction, developed in 1994 and controlled by the Association for High Environmental Quality (ASSOHQE). The HQE certifi cation is based on 14 target areas grouped in 4 themes: environmental construction, environmental management, comfort and health. The choice of construction products and materials is based on Environmental Product Declaration (EPD s) that include LCA data. How can Sika Roofi ng Systems contribute to your HQE certifi cation? Sika green roofi ng systems as well as our highly durable roofi ng membranes contribute to the themes environmental construction & management. EPD s according to the French standard are available. For further details, please contact Sika France or visit CASBEE (Comprehensive Assessment System for Building Environmental Efficiency) The CASBEE is the Japanese tool for assessing and rating the environmental performance of buildings. It was created in 21 by the Japan Sustainable Building Consortium (JSBC) and measures the ratio between the Building Environmental Quality & Performance (e.g., thermal comfort) and the Building Environmental Loads (e.g. energy effi ciency, global warming). LCA is used to determine quantitative assessment indicators for typical building environmental loads. How can Sika Roofi ng Systems contribute to your CASBEE rating? Sika green roof systems, highly refl ective roofi ng membranes and high performance thermal insulation contribute to the CASBEE rating. For further details, please contact Sika Japan or visit Green Globes The Green Globes system is based on BREEAM and was created in It is used in Canada, operated by the Building Owners and Managers Association of Canada (BOMA) and Energy and Environment Canada Ltd. (ECD), and in the USA, where it is operated by the Green Building Initiative (GBI). In the Green Globes system for the Design of New Buildings, points are given in the resource section for conducting a LCA of building assemblies and materials. How can Sika Roofi ng Systems contribute to your Green Globes rating? Sika roofi ng systems can contribute to multiple points in the sections Site, Energy, Resource/Materials and Indoor Environment. For further details, please contact Sika Sarnafi l US or visit l.sika.com Green Star The Green Star environmental rating system of buildings was developed in 23 by the Green Building Council of Australia (GBCA), based on LEED and BREEAM. It is leading in Australia, South Africa and New Zealand. Green Star assesses a project s environmental performance against nine environmental impact categories. It encourages the use of materials that fulfi l its environmental best practise, but does not have a real inclusion of LCA. How can Sika Roofi ng Systems contribute to your Green Star rating? Sika Climate Protection Solutions, green roof systems and high performance thermal insulation can contribute to your Green Star rating. For further details, please contact Sika Australia or visit 27
28 How Can I Contribute to Sustainable Construction? Sika provides a full range of solutions from Basement to Roof. Please request further information from your local Sika organization. You Can Contribute to Sustainable Construction by: Choosing roofing systems that use less energy and resources Selecting roofing systems with a low Global Warming Potential (GWP) reducing the carbon footprint of your building Investing into highly durable roofing systems that have stood the test of time saving energy and resources as well as cost over the life time of a building Selecting a roofing system that is recycled at the end of its service life Further Information on Sustainability The link opens the Sika Corporate Sustainability webpage. It provides you access to information on Sika sustainability partnerships and initiatives, environment & safety and much more. Sika Services AG Business Unit Contractors Industriestrasse 26 Our most current General Sales 66 Sarnen / Switzerland Conditions shall apply. Phone Please consult the Product Data Fax Sheet prior to any use and processing. Sika Services AG / BU Contractors / CMS / / ID: 23834
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