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ABSTRACT

Damaging of thermal insulations in wooden structures by mechanical, physical, chemical or biological factors leads to impair of their efficiency in a connection with energy and economy losses. Paper discusses resistance of selected synthetic-organic (expanded polystyrene, extruded polystyrene and polyurethane), natural-organic (cellulose, straw, hemp, granulated cork, fleece) and inorganic (rockwool, glass wool) heat-insulation materials against the house mouse (Mus musculus) - var. albino laboratory mouse. The experiments have been based on a new methodology modified from the methodology of prof. Wasserbauer, Czech Republic. The thermal insulations with dimensions of 100 mm × 175 mm × 410 mm (thickness × width × height) were situated in glass containers 555 mm × 545 mm × 410 mm divided with two glasses on three 179 mm wide subsections, and then exposed to 24 hour's activity of mouse males and females which food used as bait (mixture of fruits, chesses, chocolates, sausages and breeding granulated food) was located on the other side of insulations. The highest resistance against destruction activity of the house mouse showed the polyurethane foam (Puren MV PUR-PIR) and the extruded polystyrene (Austrotherm XPS TOP; Styrodur 2800 C). On the other hand, the lowest resistance against mouse activity showed all natural-organic insulations, i.e. cellulose (Tempelan), straw, hemp (Q-Flex), cork (Expanded granulated cork), and fleece (NaturWool). Resistance of the expanded polystyrene (EPS 70 F WhiteFacade; Isover EPS GreyWall), the rockwool (Nobasil FKD; Isover TF), and the glass wool (Isover Multimax) against the mouse destruction activities was a partly better, but not sufficient in terms of practice.

Key words: wooden structures, energy, thermal insulation, damaging, house mouse.

UVOD

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