@article{oai:tobunken.repo.nii.ac.jp:00003828,
 author = {高見, 雅三 and 石崎, 武志 and Masazo, TAKAMI and Takeshi, ISHIZAKI},
 issue = {51},
 journal = {保存科学, Science for conservation},
 month = {Mar},
 note = {Construction of Otaru Branch of Kyu Nihon Yusen building was started in 1904 and completed in October 1906. It is a two-storied building of stone in the style of French Renaissance with zinc-plated iron roof. After 70 years from its  onstruction,various parts of the building had deteriorated due to frost damage. Otaru city carried out restoration work for 33 months from October 1984 to June 1987. After 20 years from its restoration, the building materials of Otaru tuff deteriorated under the roof on the north and south sides and cracks were found at the borders between places where water repellent material had penetrated and where it had not. Wall paper called kinkarakawakami had also deteriorated due to penetration of rain water through the roof. In addition,fungi were found on the wall surface and color changes were observed on the ceiling.
 This paper reports on the observation of deterioration of building materials and measurement of temperature and humidity inside and outside the building as well as the water content measurement of the wall surface. From these observations,it was revealed that the main cause of deterioration was damaging and rusting of the roof and chimney which allowed rain water and snow-melt water to enter the rooms. The speed of deterioration is considered to be increasing these years. Especially, part of the outside stone wall made of Otaru tuff under the roof in the north,west and south sides have deteriorated;such a phenomenon was not observed at the time of restoration. Rain water had penetrated into the stone mainly through the deteriorated part of the roof and rain water gutters as well as through the deteriorated part of the outside wall. Part of the penetrated water was stored under the roof, on the borders previously mentioned and between the stone blocks. The freeze and thaw cycles of the water in these areas caused the deterioration of the building materials in winter.
 As a protective measure,it is necessary to prevent water penetration into the building materials so as to avoid frost damage in winter. It is also necessary to restore the roof, chimney and rain water gutters immediately to prevent further damaging of building materials.},
 pages = {77--95},
 title = {〔報文〕旧日本郵船小樽支店の建築部材の劣化と保存対策},
 year = {2012}
}