A new tilted strips external thermal insulation composite system (TiS-ETICS): Description and performance assessment through thermal and energy simulation for a residential building

This work presents a new concept of facades coated with machined ETIC boards displaying tilted strips. Strips with upwards tilt have a high total solar reflectance (TSR) paint, to maximize the solar radiation reflection during the summer period. Strips tilted downwards have a low TSR paint, to maximize the solar absorption during wintertime. Parameters that characterize this new tilted strips ETIC system (TiS-ETICS) were optimized for four different locations: Porto, Sao Paulo, Los Angeles, and Sydney. The indoor temperature, in the free-floating mode, and the energy demand needed over the year, in conditioned mode, were both assessed through building simulation. The use of TiS-ETICS, compared to pristine facades, always led to a positive impact on performance. In free-floating mode, with the new system, indoor temperatures dropped in summer and increased in winter. In conditioned mode, annual energy savings between 10.8% (in Porto) and 32.3% (Sao Paulo) were obtained.

Automated summary

This study introduces a new concept of facades coated with machined ETIC boards displaying tilted strips, which shows positive impacts on indoor temperature and energy demand optimization in different locations. Compared to pristine facades, the new TiS-ETICS system results in temperature decrease in summer and increase in winter in free-floating mode, and achieves annual energy savings in conditioned mode.