A "follow-up" study of moisture conditions and performance of moisture sensors in flat roofs provided with exterior insulation in the late seventies
Christensen, G. and Bunch-nielsen, T.
2002 6th Symposium on Building Physics in the Nordic Countries, Trondheim, Norway, Jun 17
Christensen, G. and Bunch-nielsen, T., (2002), "A "follow-up" study of moisture conditions and performance of moisture sensors in flat roofs provided with exterior insulation in the late seventies", 6th Symposium on Building Physics in the Nordic Countries, Trondheim, Norway, Jun 17.
Abstract:
INTRODUCTION
The use of exterior insulation on top of flat ventilated wooden roofs in order to improve the moisture conditions in the roofs has been common practice in Denmark in about 20 years. The basis for the guidelines dealing with the construction of such roofs was based on a large scale practical experiment encompassing 48 roofs in a low-rise high density housing near Copenhag en.
The measurement equipment used for the investigations (e.g. a new type of moisture sensor) was developed by the Danish Building Research Institute. The institute also coordinated the measurements in the test buildings in the housing estate and was responsible for the treatment of all the data collected. Some spot measurements carried out early in 1999 had indicated that the moisture sensors in the roofs were still operating and it was considered of great value to make a "follow-up" study using these already existing sensors. With the financial support from the Danish Ministry of Housing and Planning it was possible in the winter of 2000 to repeat the measurements carried out about 20 years ago with the aim to see if moisture conditions in the roofs were still acceptable and if the moisture sensors were still in a condition which made moisture measurements possible.
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