Heat insulation specifications of the fitting which combined a
Taiko-shoji with wooden pair glass sash are effective as the way of repairing a traditional wooden house with not only heat insulation performance but also the execution and design as well. In this paper, the insulation performance of
Taiko-shoji was examined by indoor experiment, actual house measurement and numerical calculation. The results are as follows. As the result of indoor experiment, the heat resistance value of
Taiko-shoji (air space=26mm) was at 1.3 times of single shoji and about 20% of the heat transfer coefficients decreased. As the result of measurement of improved actual house, the average heat resistance value of
Taiko-shoji + pair glass was 0.64 m
2·K/W, pair glass only was 0.35 m
2·K/W. The overall heat transfer coefficient of
Taiko-shoji + pair glass decreased to 27% of single glass by the numerical calculation. In case that the traditional house with single glass is repaired by
Taiko-shoji + pair glass fitting, the validity of these specifications is shown by the simulations.
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