T2 Kiln vs air seasoning (2 marks) + EMC (2 marks) · Industrial Technology Timber

T2 · Kiln vs air seasoning (2 marks) + EMC (2 marks)

Fits: 2021 Q12 (2), 2022 Q12 (2), 2015 MC6 · 124 words · 4 chunks

T2.1 · Kiln fasterKiln seasoning is much faster than air seasoning (days or weeks instead of months or years) because temperature, humidity and airflow are controlled inside a chamber.T2.2 · Kiln controlIt can dry timber to a precise, lower moisture content suited to indoor furniture, which air drying cannot reach. The heat also kills insects and fungi, and less yard space and stock are tied up.T2.3 · EMC meaningEquilibrium moisture content (EMC) is the moisture content at which timber neither gains nor loses moisture to the surrounding air.T2.4 · EMC importanceTimber should be selected and seasoned close to the EMC of where the product will be used. If it is too wet it will shrink after construction, causing gaps, loose joints and cracks; if too dry it will swell, causing cupping and buckling.

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