intervention strategies for renovation of social housing estates

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Conclusions and recommendations. Chapter 9 ------------------------------------------------------------------------------------------------- Change of the total high-rise cubature (building volume). Regards the addition of a new the top-end (residential tower and transversal lowrise housing), the subtraction by selective demolition (inclined building portion between Florijn Noord and Zuid) and the extension by attaching new housing volumes (ateliers at the bottom). Interventions within the dwellings. Adaptation for special groups by vertical and/or horizontal combination (atelier for artists and dwellings for students). Use of the bottom. Conversion of existing housing units into rooms for rent (commercial activities) and of some of the storages into ateliers. Redefine accessibility. Addition of elevators and subdivision of long galleries. New entrances. Appearance of shared spaces. Aesthetical improvement of entrances, staircases and galleries (more space, new materials, colours and paintings) and substitution of parapets (concrete panels into soft-green glass); Improvement of technical aspects. Addition of insulating layers (from inside), renewal of water supply and sewage system, and installation of district heating and upkeep of installations within the dwellings. By observing the projects presented in this research two major negative aspects have to be reported: 1) Envelope directed approach for renovation (preserving the bearing casco and substituting the existing façade), is not common in the Netherlands. There are only exceptional projects in which the building envelope was adapted or completely changed to improve the quality of the building and transform its identity (like De Leeuw van Vlaanderen and Osdorperhof in Amsterdam.). This approach, in fact, does not represent the actual practice. Renovation is rather dominated by interventions improving the quality of the block, meanwhile preserving the initial architectural appearance by conserving its relevant characteristics. This emerged comparing ex-ante and ex-post renovation of examples like Enschedelaan (Den Haag) and most of the other projects by van Schagen Architekten (Chapter 4). Clearly, this is not to say that such an approach is wrong or limited. Rather, that it is the one mostly implemented so far and that other approaches, like radical transformations aiming at substantially change the ‘look’ of the block, like envelope directed approach, remain on paper (Gigantic and Kleiburg) or are exceptionally developed. In this respect, the renovation of high-rise blocks in the Poptahof (Delft) will be very interesting, where the building envelope is going to be substituted and integrated to get a completely new appearance (Chapter 8, Section 8.1.2) . 2) Energy savings in renovation is very limited Few of the Dutch examples until now are driven by a kind of ‘energy efficiency approach to renovation’. Thermal insulation of existing envelope is the most common solution. This is quite surprising in the view of the European Performance Building Directive - EPBD (refer to ‘Improve energy efficiency of the building envelope’ in the previous section and Chapter 4). 9.1.3) RESEARCH QUESTION 3 RQ 3) What might be strengths and weaknesses of implementing Dutch physical measures for renovation in the Roman context? 6. I
Conclusions and recommendations. Chapter 9 ------------------------------------------------------------------------------------------------- In Chapter 8 a matrix of physical measures for renovation aiming at supporting decision making is presented. Each of the 48 solutions is provided with its respective strengths and weaknesses in terms of physical aspects, appearance, social aspects and feasibility. All strengths and weaknesses can not be listed and commented here, therefore are only reported general observations. Housing differentiation Major strengths of transformations to improve the existing housing supply can be the following. Dwellings become affordable for wider groups (size, age and income of households) and free choice possibilities are extended (‘housing career’). Shifting to homeownership gives a short term financial return for the housing association (if dwellings are sold at market price) and can reduce social problems (people care more about private than rented goods. But there is no no scientific evidence to substantiate this). Unused spaces within the block can be used for transformation leading to less uncontrolled spaces and less expenses for maintenance. Higher livability and more social safety can be obtained when the relationship of the building with its surroundings is improved (new dwellings at the ground floor, new passageways, etc. Weaknesses can be: mixing different groups is difficult (could be limited to some segments of the social structure) and lack of privacy or higher criminality figures (thefts) might derive when using the ground floor, especially to place housing. Limitations for feasibility can be summarized as local regulations, structural stability of the block (and technology), available space (like height of ceilings), need for further facilities (if “optoppen: elevators might be required) and removal of tenants during the works. Accessibility The existing accessibility system, thus the functional quality of the entire building, can be improved by: restyling and/or adding new galleries, elevators (and staircases) and further entrances (Chapter 4 and 5). These changes make also dwellings available for wider groups (like elderly, disabled and families with kids). By using specific solutions, transformation of the accessibility can not only improve the livability but also improve the attractiveness and the recognizability of the building (see the matrix in Chapter 8). For transformation of accessibility the limitations listed above are valid. Non-residential functions Most common non-residential functions added to the existing buildings presented in the study are education, social services, small commercial business and medical care. They can: improve the livability of the block and its surroundings (better relationship of the residents with facilities of their building.), attract people form other neighbourhoods and decrease sense of anonymity (Chapter 4. tab. 4). A weakness is that social problems might emerge, due to the fact that those functions mostly are closed at night. Feasibility might be restricted by: location and bad reputation of the area, competition with other neighbourhoods. This is also true for the two previous issues. Energy efficiency General strengths of implementing measures directed to energy efficiency can be that they leave more money for the residents for living expenses, thanks to lower energy bills. These measures also can improve the societal awareness of the residents (they are also citizens). Major weaknesses related to the implementation of energy efficiency measures are that they are not yet compulsory, require higher investments but constitute a financial return only for the residents. They are usually not integrated with other solutions (like heat pumps, heat power, central systems and biogas) and often do not treat aspects related to inner comfort (natural ventilation, overheating, health, condensation, cold bridges and noise due to air circulation). Appearance Strengths of adopting those measures aiming at improving the ‘look’ of the building can be: improvement of its recognizability thus the orientation within the 7. I RESEARCH QUESTION 3
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INTERVENTION STRATEGIES FOR RENOVAT
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TABLE OF CONTENTS ACKNOWLEDGEMENTS
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The research set up Chapter 1 -----
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Theoretical background Chapter 2 --
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Social housing renovation Italy: wh
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Approaches to renovation interventi
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intervention strategies for renovation of social housing estates

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