Abstract
The paper is focused on a verification of the moisture content of fiberboard insulations in the multilayer loadbearing log wall designed with and without the vapor barrier. Experimental verification was done using a sample of the multilayer loadbearing log wall built in a research timber structure building under in-situ conditions. Indoor properties of the building met conditions for human occupancy. The experiment was performed for 2 years and 3 months. Aims of the fiberboard insulations moisture content verification in the walls were to verify the effect of vapor barrier in various periods of the year and verify excessive moisture in the fiberboard insulations, which is undesirable in terms of biodegradation. The results of measuring the moisture content showed that after a certain period, the difference of insulation moisture content in the wall including and excluding vapor barrier is negligible, as well as other results and conclusions for designing the composition of multilayer loadbearing log walls.
Highlights
Log structures are unquestionably attractive and architecturally interesting structures for human occupancy, year-round lodging and other purposes
The results indicate that the vapor barrier effectivity on the insulation moisture content was significant in heating season 2019 (HS19); otherwise, the effectivity proved not significant
The results indicate that the vapor barrier effectivity on the insulation moisture content was not significant in HS19; otherwise, the effectivity proved significant
Summary
Log structures are unquestionably attractive and architecturally interesting structures for human occupancy, year-round lodging and other purposes. Log walls have been designed as a single layer made of lumber, with a width of 200 to 400 mm. Joints of log walls and joinery details were sealed to prevent thermal loss of the building due to air leakage. They were erected in various ways with various effects on air tightness. Significant thermal loss results from a heat transfer through the log wall. Design of these structures became insufficient in terms of increasing thermal performance demands due to energy saving and environment impact
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