On-site monitoring for better selection of stone repairs: A case study

Thibault Demoulin, Fred Girardet, Timothy P. Wangler, George W. Scherer, Robert J. Flatt

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Weathering of clay-bearing sandstones does not only depend on material properties but also on the environmental conditions they are exposed to. The same is true for repaired stones, in which the compatibility of the repair mortar should be studied not only in terms of material properties, but also in terms of the climatic conditions it will be subjected, in order to maximize this compatibility. This paper proposes a methodology to quantify the thermal and hygric stresses in clay-bearing sandstones and their repair, based on the measurement of temperature and relative humidity at the surface and at several depths in a repaired and a non-repaired stone, as well as wind-driven rain and absorbed water. This is illustrated by a case study in an historical building. The data are used to quantify the stresses in the materials and to propose possible degradation mechanisms.

Original languageEnglish (US)
Article number38
JournalHeritage Science
Issue number1
StatePublished - Nov 11 2016

All Science Journal Classification (ASJC) codes

  • Conservation
  • Archaeology
  • Archaeology


  • Acrylic-based mortar
  • On-site monitoring
  • Reprofiling
  • Sandstone degradation
  • Surface repair mortar


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