Abstract
The article presents four equivalent methods for checking mold growth on the surface of building barriers and checking water vapor condensation on their surface. Each method applies to two parallel phenomena that may occur on a building barrier. The first method is to calculate and compare temperature factors. In the second method, the characteristic humidity in the room is calculated and compared. The third method is to calculate and compare the characteristic temperatures in the room. The fourth method is based on the calculation and comparison of characteristic water vapor pressures. Three boundary conditions are presented for each method and phenomenon: when a given phenomenon can occur, when it begins or ends, and when it does not occur. The presented methods systematize the approach to the problem of mold development and surface condensation. The presented calculation results relate to the selected building barrier functioning in specific indoor and outdoor climate conditions. The calculation results confirm the compliance of the presented methods in identifying the phenomenon of mold growth or condensation on the surface of the barrier. A graphical interpretation of the results for each method with periods of occurrence or absence of a given phenomenon is also presented.
Highlights
The development of mold and/or condensation on the surface of building barriers are physical phenomena that occur in various types of buildings, mainly on their internal surfaces
These phenomena are harmful to the functioning of building barriers, and to residents or users due to mold fungi growing on their surface [1]
In the the phenomenon phenomenon of of mold mold development development and and surface surface condensation, condensation, depending depending on on the the selected selected calculation method, parameter differences having negative values show how calculation method, parameter differences (∆fR; ∆φ; ∆Θ; Δp) having negative values show how much much the given quantity has been exceeded, which is associated with the phenomenon of mold or condensation
Summary
The development of mold and/or condensation on the surface of building barriers are physical phenomena that occur in various types of buildings, mainly on their internal surfaces. These phenomena are harmful to the functioning of building barriers, and to residents or users due to mold fungi growing on their surface [1] They cause the formation of disease entities such as allergies and allergic reactions in humans and animals, and the occurrence of a specific smell. In the current period, when buildings with a higher number of sealed off areas and thermal insulation of external barriers are erected (more comfortable barriers due to the higher temperature of their internal surfaces), these phenomena appear more often and are even more disturbing [5] The reasons for these phenomena have been described in the article on alternative methods of determining mold risk [5]. The results confirm that the Buildings 2020, 10, 4; doi:10.3390/buildings10010004 www.mdpi.com/journal/buildings
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