Bratasz, L and Kozłowski, R and Camuffo, D and Pagan, E (2007) Impact of indoor heating on painted wood: monitoring the altarpiece in the church of Santa Maria Maddalena in Rocca Pietore, Italy. Studies in Conservation, 52 (3). pp. 199-210. ISSN 00393630

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Abstract

In the church of Santa Maria Maddalena in Rocca Pietore, Italy, the dimensional response of the wooden altarpiece to variations in indoor temperature and relative humidity (RH) was monitored between December 2002 and March 2005. Measurements demonstrated that only the external layer of wood, several millimetres thick, continually absorbs and releases water vapour following external variations in RH. For massive elements this leads to strong gradients in the moisture content through wood, a restraint of the dimensional change and a development of stress, which is the main threat to the integrity of wood and the decorative layer. Particularly strong RH variations and related high stress levels were produced by the intermittent heating system based on the inflow of warm air. To incorporate requirements for preservation, heating systems must provide a localised comfortable temperature in the area where people are without changing the natural climate of the church as a whole.

Item Type:	Article
Uncontrolled Keywords:	Church; Heating; Painted wood; Climatic stress; Intermittent heating; Localised heating
Subjects:	?? case ?? English > Damage functions > Mechanical damage ?? heat ??
Depositing User:	Anna Samuelsson
Date Deposited:	08 Apr 2008 12:08
Last Modified:	03 Apr 2017 15:53
URI:	http://eprints.sparaochbevara.se/id/eprint/172

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