Roof top car parks become sustainable property

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1 Technical report Roof top car parks become sustainable property As a result of the combination of high building density and increased inner-city traffic volume, roof top car parks are representing an ever more important aspect of shopping centres and commercial buildings (both private and public). For a long time now, roofs have no longer simply been the final item in the budget, the sole purpose of which was to keep the building watertight and to literally offer a roof over the head of residents and workers; they have now also become a place to park or spend leisure time. It is clear this trend is set to continue, since roof top car parks can make a substantial contribution to the sustainability of buildings and hence their overall value. This report tells you what contribution the Pardak 110 system can make.

2 Corporate social responsibility Investors, clients, project developers, architects, building contractors and building operators (facility Managers) are increasingly focusing on the aspect of sustainability in planning any real estate project. Alongside possible cost savings due to lower energy consumption, sustainability also plays a key role in the image and hence sale or letting of the property. Indeed, Government Legislation is increasingly making building owners and operators more responsible for the whole footprint of their building. As manufacturers and constructors of roof solutions, Zoontjens are delighted to join you in taking responsibility for a more sustainable future. Oldenburg, Germany With more than 100 years of (international) experience For more than 100 years, Zoontjens has been working on improving roof top car parks in terms of sustainability and service life. Over that period, Zoontjens has developed from a Dutch-based family business to a European specialist company for roof top car parks, terrace roofs and balconies. The company today is part of the stock exchange-quoted CRH Group, an organisation active worldwide in the sustainable production and sale of construction materials. Zoontjens operates its own production facilities, a specialist R&D department and employs its own roof specialists. All in all, the company is able to design, build and maintain a sustainable roof solution for any building.

3 Sustainability targets ISO To ensure sustainable production, Zoontjens operates according to the international ISO guideline, on the following targets: ISO SOCIAL RESPONSIBILITY The origin of all raw materials and semi-finished products used is examined for sustainability, compliance with human rights and the ethical principles of the suppliers. Only those materials and products are used that have a positive influence on our natural environment, for example through CO 2 reduction and recycling The roof or roof top car park must offer our clients long-term, economic advantages Our suppliers all undertake to maintain the same high environmental standards as Zoontjens itself Zoontjens exclusively cooperates with suppliers who make an active contribution to developing more sustainable products and production processes Transparent performance measurements make it possible to demonstrate our flexibility throughout the entire supply chain thereby delivering value creation for our customers, wherever possible. The Dutch consultancy firm BMD analysed Zoontjens in 2012 according to the international ISO standard, and scored Zoontjens as a proactive company in all key areas: solid management, social responsibility, fair business practise, environment, labour practises and human rights.

4 Concrete is becoming ever greener Material is a decisive element in our built environment. Thanks to its unique characteristics, concrete is a material that can be made as sustainable as required by its application, simply by varying its composition. Zoontjens is actively involved in this aspect of concrete, for example NatureGreen roofing. This concrete slab neutralises CO 2 through the use of Olivin, and is made up of recycled glass, blast-furnace granulate and recycled concrete granulate. Similar coating layers can also be applied to roof top car park slabs. This is just one example of how Zoontjens makes a contribution to sustainable building in a responsible manner, wherever possible. CRH Sustainable Concrete Centre, market leaders in sustainability Zoontjens has set itself the target of reducing the CO 2 balance of its entire supply chain by 25 % by the year 2015 and by 50 % by Engineering departments of Zoontjens are constantly working to develop more innovative and more sustainable products. It goes without saying, however, that these targets cannot be achieved by our company operating alone. To underline its sustainability targets, CRH has established the CRH Sustainable Concrete Centre (SCC). The SCC acts both as consultant and specialist centre, supporting and advising the concrete companies within the CRH group in developing sustainable products, concepts and processes with existing and new materials.

5 Zoontjens Deutschland GmbH is a member of the German Association for Sustainable Building (DGNB - Deutsche Gesellschaft für Nachhaltiges Bauen) The durability and user-friendliness of our products and systems have for years been the foundation stone for our growth strategy. This is reflected by our dedicated work force, numerous certifications and the introduction of innovations like the Pardak 110 system and more importantly the many satisfied customers. Day in day out our roof specialists operate according to the ISO standard on ever more sustainable operating processes, systems and improved solutions for our customers. The same is true of our colleagues in our parent company CRH, a stock exchange-quoted company active worldwide in the sustainable production and sale of construction materials ( Sustainability testing Under the supervision of the Dutch Roofing Consultancy Agency BDA (Nederlands Bureau voor Dakadvies), a third series of practical sustainability tests was implemented at the start of These tests revealed that the roof top car parks installed by Zoontjens throughout Europe over the past 35 years are still in remarkably good condition. Together with the Technical University in Munich, the overall operation of the Pardak 110 system was thoroughly tested. Together with the Güteschutz organisation, the effects of freezing and melting on our material thickness were measured, while in the highly demanding Braunschweig fire test, the system achieved a 100 % score.

6 The target for Pardak 110 is cradle-to-cradle The Pardak system from Zoontjens is a complete, patented solution that offers the maximum possible flexibility, according to which sustainable, high-quality roofs can be supplied, for parking, working and living applications. A total surface area in excess of 1.5 million m 2 has now been installed, across Europe. Zoontjens can call upon extensive specialist skills from design in collaboration with architects through to maintenance by building operators. The overall target is to improve sustainability throughout the chain from purchase through to recycling: Purchase In part, Zoontjens operates according to the purchasing policy of the CRH group. Against that background, for example, responsibly sourced power is used at production locations, and wherever possible, raw materials are transported by ship. In principle, recycled raw materials are the preferred first purchase option, for example concrete granulate, blast furnace granulate, fly ash and calcium granulate, a waste product generated during the production of drinking water. The more product specific purchasing policy at Zoontjens is based on the company s own sustainability policy, as described over the next few pages.

7 ISO The plant in the Netherlands where all roof top car park slabs are manufactured is ISO certified. This worldwide-approved standard relates to the control and improvement of all operating processes in respect of environmental risk factors. ISO certified companies meet all the environment-specific statutory requirements and regulations governing their sector, and have developed an environmental protection system that wherever possible ensures continuous improvement in environmental performance. A secondary effect is that the environmental awareness of the entire workforce is raised. The CO 2 balance at Zoontjens has been reduced overall from 17,981 kg CO 2 in 2010 to 9,762 kg CO 2 in ISO certification no. K58565/01 through to 2015 It goes without saying that in addition to the operating processes, all raw materials used and other purchased materials have a major influence on the sustainability of our products and production-based environmental risks. Generally speaking, wherever possible, Zoontjens uses recycled raw materials while the majority of system components are themselves recyclable at the end of their lifecycle. In this manner, the entire lifecycle of Pardak roof top car parks is increasingly based on the cradle-to-cradle principle.

8 Pardak 110 system Pardak 110 slab The Pardak 110 is a prefabricated concrete slab manufactured from the base materials limestone, chipped stone, sand and cement, dosed in various components roughly according to the proportion 22 : 20 : 39 : 19 %. During production, approximately 37 litres of water are used per slab, with an end weight of approx. 270 kg. At the end of its product lifecycle, each panel can be crushed and reused as concrete granulate for new concrete products. Pardak 110 pressure distributor pad The Pardak 110 pressure distributor pad consists of various recycled rubber granulate components, bonded using a special adhesive. For every 3 cm thick pad, the rubber from a whole car tyre is used. The pads weigh approx. 7 kg and consist of 3 kg iron and 4 kg rubber. At the end of the product lifecycle, these pads can also be reused to produce new pressure distribution pads or other recycled rubber products. Pardak 110 corner piece Every Pardak 110 slab is fitted on all four corners with a plastic corner piece in virgin plastic material. Just like every other part of a Pardak 110 roof top car park, the corner pieces can also be recycled for reuse in other plastic products.

9 Pardak 110 tensioning element The Pardak 110 tensioning element comprises two materials: the external body in natural rubber and an interior in virgin plastic. Both materials can be fully reused at the end of their product lifecycle. The internal section is an injection moulded part manufactured on an electrical machine, saving up to 40 % electrical power as compared to production on conventional machines. Transport In collaboration with the parent company CRH, for international projects we select the best production location from among the various CRH concrete plants throughout Europe. For the precise gluing of the corner sections to the slabs, an ultramodern mobile robot has been developed that can easily be connected and disconnected and hence rapidly transported to the selected production location. Thanks to this flexibly-planned production capacity, depending on the CO 2 balance of the transport operation, we can decide at which location in Europe the Pardak slabs for your project can best be manufactured. In this respect, we operate differently from all our competitors.

10 Laying and maintenance For the laying of its Pardak 110 roof top car parks, Zoontjens collaborates with construction companies and contractors trained and certified by our own roofing specialists. This applies both to operational quality and the laws and regulations governing safe working practise on construction sites, and for overall corporate responsibility. Furthermore, Zoontjens complies with the strictest international standards included by the CRH group in its company policy. By using sustainable (raw) materials, Pardak 110 roofs have a service life of at least 30 years, requiring one annual maintenance inspection. The Wall Utrecht, Netherlands Lyon, France Renovation Renovation work is often undertaken on old roof top car parks where much damage has occurred. The problems often focus on the question of the roof camber, and the related problems at joints. The same applies to joints in the surface. Following thorough examination of the structure of the building (e.g. the level of gritting in the concrete roof) and static testing, a Pardak 110 system in prefabricated concrete slabs is often the solution. In roof top car park renovation projects, with high traffic volumes, the Pardak 110 system offers the operator the following commercial advantages: Simple phased implementation During the overall project, sections of the roof top car park can be used without risk to visitors Rapid laying, with practically no influence from weather conditions Recycling As far as possible, Zoontjens uses recycled products in its product systems. Excellent examples are concrete granulate, blast furnace granulate, fly ash and car tyres. This document contains more detailed information about the use of these materials.

11 The added value of roof top car parks In inner cities and their immediate surroundings, combined use and multiple use of space are increasingly becoming key elements, above all based on lack of space and high land prices (economics). In addition, thanks to the combined land use, less soil is covered with construction or paving, leaving more space for green and grass elements (land use and ecology). To underpin Zoontjens position on sustainable living space, we have established a strategic business unit specifically responsible for encouraging the use of Pardak 110 roof top car parks for multiple applications. Green roof top car parks It is common knowledge that in nature, plants capture CO 2, dust particulates and other airborne pollution. Plants need CO 2 to survive and grow. In that process, they then release oxygen. This process, known as photosynthesis, forms the basis for all life on earth. If you wish to proactively use this process, in the same way as roadside planting, plant containers and shrub borders can be excellently combined with the modular construction of the Pardak 110 system. This option also makes the roof top car parks more optically attractive for visitors and the shopping public. Trento, Italy Storm attenuation During heavy precipitation, on-site cast concrete roofs rapidly form puddles or lead to overloading of the drainage system due to rapid water discharge. With a Pardak 110 roof top car park, one option is to delay water discharge by installing a rainwater discharge delay system between the roof and the prefabricated concrete slabs. This too can help to improve the working and living environment. Genk, Belgium

12 Zoontjens Centaurusweg 19 25, 5015 TA Tilburg PO Box 61, 5000 AB Tilburg The Netherlands T +31 (0) F +31 (0) E info@zoontjens.co.uk