17 Jun '14, 11am

The performance characteristics of Cross Laminated Timber ... #Construction #Sustainable

Thermal conductivity (λ lambanda value) : 0.13 W/mK (spruce). CLT insulation performance is similar to aircrete blockwork and better than concrete blockwork or brickwork. Additional insulation is usually required (see External cladding) to upgrade the element to a higher performance. Passivhaus standards are easily achievable. Thermal mass Density: 480–500 kg/m3 (spruce). Though trumpeted as an effective thermal mass, exposed CLT panels only provide a low – medium level of effectiveness and well behind brick or concrete / concrete blockwork. Decrement delay The combination of thermal conductivity, specific heat capacity and density of solid wood panels such as CLT together with a multi-layer construction format ensure a high level of decrement delay. This is particularly useful in high summer temperatures where 10 – 14 hours of decrement delay (phase shifting) can be achie...

Full article: http://www.greenspec.co.uk/building-design/crosslam-timbe...

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