8. BUILDING PHYSICS 8.2.5 Ignition temperature of LVL Like all wood products, LVL is classified as a combustible material. The ignition temperature of LVL is about 270 °C, when exposed to flame. Spontaneous ignition does not occur in temperatures below 400 °C. The ignition temperature of wood is also dependent on the duration of exposure to high temperature. Ignition temperature decreases as the duration of exposure increases. After more than 20 hours of exposure, there is an ignition risk of wood products at temperatures above 120150 °C 46. 8.3 AIRTIGHTNESS LVL-C panels are airtight beyond what can be measured. In the building physics design of structures, it is essential pay attention to the joints and seals between the panels and other structures to ensure the airtightness of the entire building envelope. This can be achieved, e.g., with careful installation of sealant tapes that are durable enough for the design service life of the building. LVL-C panels have been utilized, e.g., in 3-layer CLT wall panels as the middle layer of the product to make them airtight. LVL Handbook Europe 177
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