Maintenance procedures of different wood coating systems were studied in field exposure trials with coated balcony constructions. Maintenance coatings were applied on one half of each of the balcony parts after 18 months and assessed after 24 months of total exposure time. It was found that the opaque white coating systems were the most durable ones reaching long intervals of required maintenance. For systems with lower durability on the maintained surfaces further degradation of the coatings was prevented. Different characteristics were observed for film forming and non film forming semi-transparent varnishes. Definitions of a series of limit states for coating systems on wood were suggested including esthetical limits and three levels of durability limits. Film forming coatings can reach two durability limits, i.e. the maintenance interval and the renovation interval. For non film forming coatings there is only one limit state of coating durability where maintenance is needed. The third durability limit is related to the coated substrate, i.e. the wood component, by the onset of decay in wood.
Wartungsmaßnahmen und Definition von Grenzzuständen für HolzaußenbeschichtungenZusammenfassung Wartungsmaßnahmen von verschiedenen Beschichtungssystemen für Holz wurden in Freilandbe-G. Grüll ( ) · M. Truskaller
Der Beitrag beschreibt, welche holzzerstörenden Pilze und Insekten eine Gefahr für verbautes Holz darstellen und anhand welcher Merkmale man erkennen kann, welche Art oder Spezies die Holzkonstruktion jeweils befallen hat.
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