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What are the advantages of a non-frame timber structure?
Label the following diagram, from inside (1) to outside (4/7):
Diagram of the external wall of a non-frame timber structure (source: Schulze Darup, adapted)
Here we have a non-frame timber wall with a curtain wall. With this configuration (including air space and cladding) a wall approx. 45 cm thick with a U value of 0.125 W/m2K results. Let's assume a timber structure for the curtain wall. The share of the load-bearing timber structure within the curtain wall should be as small as possible, and anchoring should be done using measures to minimize thermal bridging. Assuming a 5 % timber share, a U value of 0.125 W/m2K results.
* Air circulation and cladding have not been taken into account in the calculation.
Task
Calculate the U value of a more cost-efficient alternative with a composite thermal insulation system. Also take into account whether this might change the wall thickness.
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