The traditional construction systems of façades in Spain give rise to a large number of thermal bridges. Designers do not attach importance to their impact on the energy demand of buildings. This effect is increased with the introduction of greater thicknesses of thermal insulation required by regulations. One of the thermal bridges that has the greatest impact on energy demand in residential buildings is the junction of façades with intermediate slabs (slab fronts), which becomes more significant as the number of floors in the building increases. This paper analyzes this type of thermal bridges and proposes two novel construction improvements that reduce their impact on energy demand, while maintaining traditional façade construction systems. Thermal bridges (traditional construction system and improved systems) have been analyzed through the value of the linear thermal transmittance using THERM software. EnergyPlus was used to carry out an analysis of annual energy efficiency indicators of nZEB dwellings in three Spanish cities: Alicante, Barcelona and Madrid. This study shows that the application of the two proposed novel constructive improvements allows reducing the value of the linear thermal transmittance of the thermal bridge between 20% and 63.4% and the heating demand between 16.1% and 22.6%.

西班牙传统的外墙建筑系统产生了大量的热桥。设计师并不重视它们对建筑物能源需求的影响。这种效果随着法规要求的更大厚度的隔热材料的引入而增加。对住宅建筑能源需求影响最大的热桥之一是外墙与中间板（板正面）的连接处，随着建筑物楼层数的增加，这一点变得更加重要。本文分析了这种类型的热桥，并提出了两种新颖的施工改进方案，以减少它们对能源需求的影响，同时保持传统的外墙施工系统。热桥（传统建筑系统和改进系统）已经使用 THERM 软件通过线性热透射率的值进行了分析。EnergyPlus 用于对西班牙三个城市的 nZEB 住宅的年度能效指标进行分析：阿利坎特、巴塞罗那和马德里。该研究表明，应用这两项提议的新型建设性改进可以将热桥的线性热透射率值降低 20% 至 63.4%，并将加热需求降低 16.1% 至 22.6%。