Wood or aluminum carpentry: what to choose for your windows and bays?

Wood or aluminum carpentry: what to choose for your windows and bays?
The choice of carpentry conditions aesthetics, natural lighting and thermal performance. Physically, aluminum leads heat (conductivity ~ 200 W/m·K) while wood is very weakly conductive (--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Sources (selection):
• Engineering Toolbox — thermal conductivity wood vs aluminium. • Passipedia/Passive House — concepts of Uf/Uw and thermal frame bridges.
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