59 Protect against extremeclimate parameters and sudden fluctuations - protection against heat andsevere cold - avoid freeze-thaw events - avoid dew point temperaturesand resulting condensation dimensional changes and the resulting mechanical stresses in objects, mainly caused by short term fluctuations should be avoided - controlled conservation heating against condensation and freezingindoor temperatures - controlled air exchange - insulation with water vapor permeable, fire resistant ecological insulation materials (especially roof insulation, e.g., with natural fibres) condensation should be avoided bynot letting warm and damp air into cooler rooms [Staniforth, S., 200726].9 Ecological and financial sustainability - use of electric devices on a lowlevel - low maintenance reduction of the carbon footprint - preference of passive, non-mechanical strategies of environmental control improvement of energy performance Consideration of humancomfort For conservation approaches, it might be necessary to reduce the level ofhuman comfort to improve the environmental conditions for the historic materials. Table 5 – most important aspects of preventive conservation [FUTURE USE PROPOSALS AND CONCLUSION] Use proposals The past use is not applicable anymore, the following suggested uses are also not applicable to all warehouses but can be viewed as examples of multiple uses for a liveable district with consideration of the heritage value. Proposals for new use considers the central location of the warehouses (in the city centre) and their recognized aesthetic value (also for tourists), but also the nature of the buildings which require periodic maintenance-interventions over time and their low ceiling heights associated with the lack of daylight indoors as limits to the possibilities of transforming warehouses to new use. A) flea market where it’s possible to buy handmade products and local craft-made objects and gadgets. PRO - exploitation of the site for daily / weekly / monthly events - bigger flux of tourists in the city 24Maekawa / Toledo 2002, p. 5. 25English Heritage Guideline for Integrated Pest management, in: https://www.english- heritage.org.uk/siteassets/home/learn/conservation/collections-advice--guidance/eh-guideline-for-insect-pest- management-ipm-in-eh-historic-properties---website-version.pdf, accessed on 03.06.2022. 26STANIFORTH 2007, p.7.
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