Study: Sustainable building will continue to grow rapidly
Published
The number of sustainably constructed buildings worldwide will double by 2018. This is the conclusion of the study "World Green Building Trends 2016", which was published this week by the market research organisation Dodge Data & Analytics. Over 1,000 architects, engineers and construction experts from 69 countries took part in the study, which impressively underlines that a lot has happened in terms of sustainability in the global construction and property market.
WIESBADEN - At the start of the heating season, private households had to pay around % more to fill their heating oil tanks in October 2018 than a year earlier. According to the Federal Statistical Office (Destatis), consumer prices for light heating oil have risen almost continuously since March 2016 following sharp price declines in 2014 and 2015. The last time light heating oil was more expensive than in October 2018 was at the end of 2013.
The rise in heating oil prices is mainly due to the fact that crude oil also became significantly more expensive on the global market until the beginning of October 2018. Currency effects due to the strong US dollar also had a price-increasing effect in 2018, influencing the price trend for German crude oil imports (+42.8 % in October 2018 compared to the same month of the previous year), producer prices for light heating oil (+37.7 %) and, as a result, the prices for light heating oil that consumers had to pay (+39.9 %).
According to preliminary figures, the annual inflation rate for light heating oil at the consumer level remained high in November 2018 (+40.7 %), although crude oil prices on the global market have been falling since the beginning of October. Compared to the previous month, prices for light heating oil rose by 5.9 %. There were significant regional differences: While the fuel became cheaper again in some parts of northern Germany in November 2018 compared to the previous month, it became more expensive, especially in southern and western Germany. This could indicate a low water effect: Transport costs rose due to the ongoing restrictions on inland shipping on the Rhine, which in turn may have had a regional impact on the price of light heating oil.
Source: Federal Statistical Office (Destatis), 11/12/2018
with a focus on solar energy, neighbourhood concepts and funding
The BUND yearbook Ökologisch Bauen & Renovieren (Ecological Building and Renovation) published by the Bund für Umwelt und Naturschutz Deutschland (BUND) helps by making owners fit for discussions with the house bank, architect, energy consultant and craftsmen. The guidebook, which will be available from November, shows what can be done and how: Based on numerous house portraits, the annual compendium helps the reader to find out which measures, building materials and technologies are most suitable for their own project.
Written in an understandable way and clearly presented, with many examples and suggestions, the 244-page "BUND Yearbook 2019 - Ecological Building and Renovation" offers an all-round service for builders and renovators. The booklet offers six topics: basics/planning, model houses, green around the house, building envelope, building services and interior design. Furthermore, state funding opportunities are presented. With in the focus this time quarter concepts for less surface consumption and more togetherness stand. In addition, long-term experience with solar thermal energy and innovations in photovoltaics and solar power storage.
sdg21 comment: There is no comparable publication for the low costs. For this one must accept that a not insignificant part is occupied by advertisements, which are however thematically relevant. Strongly contradictory is however the request of the BUND to reduce the surface consumption, but then in the booklet almost throughout only examples of single-family houses to show. The few sustainable quarters, multi-storey residential buildings or housing estates are almost lost. The title "Neighborhood Concepts" promises more than the publication actually delivers.
The 244 A4-page handbook can be purchased at a price of 8.90 Euros at major kiosks, station bookstores and BUND offices.
Or (plus 2.00 Euro shipping costs) can be ordered from the publisher: Target marketing, Gerberstr. 5f, 70178 Stuttgart, Tel. 0711/96695-0, bestellungen@ziel-marketing.de.
The complete yearbook or individual articles are also available as an e-paper via the publisher's website www.ziel-marketing.de.
Dr. Kirsten David, a researcher at HafenCity University (HCU) Hamburg, has developed an innovative method for determining rent increases after energy efficiency measures: By means of functional cost splitting, rent increases become appropriate and comprehensible. The planning of the energetic measures is also ecologically optimized. For her dissertation entitled "Functional Cost Splitting for the Determination of Rent Increases after Energy Efficiency Measures", the scientist today receives the "BUND Research Award 2020". With the research award, the Bund für Umwelt- und Naturschutz (BUND) honors scientific work on sustainable development.
Rent increases due to energy-efficient building modernisation are legally permissible and politically desired as an investment incentive. After all, according to the German Energy Agency (dena), around 35% of Germany's total energy consumption is attributable to the building sector. An increase in the renovation rate is therefore necessary from a climate policy perspective.
However, while the legislators assume that such measures can be implemented economically and without affecting the rent, the experience of many tenants is different: Often the rent increases exceed the saved heating and energy costs many times over. In extreme cases, tenants can no longer afford their apartments. "To this day, energy-efficient building refurbishment has a reputation as a gentrification tool," says David. With the method she developed to determine appropriate rent increases, the 45-year-old scientist also wants to contribute to an increased social acceptance of corresponding measures.
"The basis of the politically expected increase amounts is the so-called coupling principle," explains the architect. "Like the Energy Saving Ordinance, it assumes that energy efficiency measures will always be implemented when a comprehensive refurbishment is due anyway. The sticking point: only the modernization costs entitle landlords* to rent increases, but not the costs for the renovation. The latter must be deducted from the total investment sum as "anyway costs". Eight percent of the remaining costs can be passed on to the tenants as a modernisation charge.
"The current regulation is insufficient. In practice, there are manifold demarcation problems between modernisation costs relevant to rent increases and maintenance costs not relevant to rent increases," says David. The method she developed, on the other hand, focuses on the climate-relevant improvement of each individual building component compared to its condition before the construction measure. "Functional cost splitting thus corresponds to the actual basic idea of the legislators, is practicable and enables an appropriate and comprehensible allocation to modernisation or refurbishment costs," says David.
According to the scientist, her approach leads to the omission of measures that are nonsensical from a structural engineering point of view and do not bring about any climate-relevant improvement of the building components: "With my method, such measures are not relevant for rent increases and are therefore uneconomical for landlords. In addition, your calculation method ensures that the modernization levy actually approaches the level of the ancillary cost savings as a rule. The award winner is therefore particularly pleased that the sustainability aspect of her work has been recognised with the BUND Research Award: "Rental housing stock can only be developed sustainably if ecological, economic and social aspects are given equal consideration. Functional cost splitting makes a significant contribution to this."
This year, the BUND Research Award will be presented at a virtual conference. Among other things, keynote speaker and environmental scientist Ernst Ulrich von Weizsäcker will discuss with the three award winners how science can develop more relevance and effectiveness for sustainability goals. The transfer into practice is also an important concern for David. Her next goal is to further develop functional cost splitting into an instrument that can also be understood by laypersons - preferably as an online tool.
Personal details:
Kirsten David is a guest researcher at HCU in the subject areas "Design and Analysis of Structures" with Prof. Dr.-Ing. Annette Bögle and "Construction Economics" with Prof. Dipl.-Ing. Reinhold Johrendt as well as a lecturer in the interdisciplinary study programmes. Her doctoral thesis was supervised by Prof. Dipl.-Ing. Reinhold Johrendt and Prof. Dr.-Ing. Thomas Krüger, (subject area "Project Management and Project Development in Urban Planning") and is freely available: https://edoc.sub.uni-hamburg.de//hcu/volltexte/2019/508/.
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