PROBLEM TO BE SOLVED: To solve the problems that conventional building materials use a large number of sheets of wall paper and plastered walls but these materials cause the generation of molds caused by the shortage of the absorption/release of humidity, furthermore these materials have no function of attracting, absorbing and decomposing organic compounds such as formaldehyde or the like, and are regarded as problematic in a health aspect, and that, in using present diatom soil-contained plastered walls and coatings, it is essential to use a pasting material but it needs a plastering technology and causes an increase in cost, while causing the fall-off or cracks of the coating materials which are note solved in problem only by the plastering technology, resulting in the extension of a necessary execution period and in the deterioration of effects of the diatom soil besides the problem of the harmfulness of adhesives and pasting materials.
SOLUTION: The diatom soil-contained building material provides environmental functions of the diatom soil as an integrated building material by making the most of characteristics of the air permeability and humidity absorbing properties of a natural porous wood and by filling finely perforated diatom soil with higher air permeability and humidity absorbing properties in the inner space of a wood building to enhance building material performance.
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