会议名称：2023世界木材日研讨会暨第五届国际林联（IUFRO）林产品文化研究组讨论会
会议时间：2023年3月21日

报告嘉宾：Michael Grabner
嘉宾简介：奥地利维也纳自然资源与生命科学大学（BOKU） 高级科学家

摘要：

Wooden shingles have been known in Europe and other regions worldwide for several thousands of  years. They are usually split, and according to handicraft rules, as well as historical literature, a split  surface has many advantages. It is more flexible, more elastic, stronger, and less exposed to cupping 
than a sawn surface because no fibers have been cut. It also follows wood rays; it is more durable  than a sawn surface because cut fibers absorb more moisture, creating good conditions for fungal  growth. 
However, because sawing is the main procedure for dividing logs into timber, sawn boards are  currently used for roofing. The short life span of such roofing has often been discussed by craftsmen. 
In this study, a 37-year-old roofing was evaluated to determine the important parameters of high durability sawn boards. Results showed that the presence of juvenile wood, fiber deviations, and  knots reduced the durability of these boards. Therefore, sawn boards of the same wood quality as  split shingles may have the same durability.

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