The European Commission releases the EPBD guidance on the energy calculation of “transparent building elements”

The European Commission releases the EPBD guidance on the energy calculation of “transparent building elements”
Photo source
Glass for Europe

Date: 2 July 2025

On 30 June, the European Commission adopted a support package to help Member States implement the new Energy Performance of Buildings Directive (EPBD).

As part of this package, a document focusing on the energy performance of “transparent building elements” was released.

Article 4 of the recast EPBD called for a review of the methodology for calculating the energy performance of buildings, particularly with regard to transparent building elements that form part of the building envelope and the consideration of ambient energy”. This document was included in the guidance supporting the revision of the common general framework for the calculation of the energy performance of buildings which is available here.

Across the European Union, minimum energy performance requirements for windows are almost entirely based on thermal transmittance properties (U-value). This prevents the optimisation of glazing components. The European Commission’s guidance aims to address this issue by encouraging Member States to establish minimum requirements based on the U-value and g-value (solar factor). The g-value accounts for solar heat gain. The guidance differentiates between building types and the types of work. However, consideration of the U-value and g-value is recommended for all.

The European Commission acknowledges that more complex calculations can be undertaken for new non-residential and residential buildings or if they undergo major renovation. In the case of renovation of existing residential and small non-residential buildings, the guidance clarifies that “retrofitting measures should address factors such as replacing outdated glazing with high-performance alternatives that optimise the performance of the element (e.g. U-values and g-values)”. The European Commission recommends that Member States provide support mechanisms, particularly for small businesses, to ensure effective decision-making and compliance with energy performance requirements.

The guidance is a great first step in improving the

Glass for Europe will collaborate with its National Partners to ensure that the guidance is considered by Member States across the EU, leading to concrete regulatory changes. The deadline for Member States to implement the revised Energy Performance of Buildings Directive is set on 29 May 2026.

In the meantime, check our two videos below to better understand the relevance of high-performance glazing:

600450 The European Commission releases the EPBD guidance on the energy calculation of “transparent building elements” glassonweb.com

Others also read

On 9 October, Glass for Europe contributed to two Calls for Evidence on the future ‘Electrification Action Plan’ and ‘Heating and Cooling Strategy’.
A long-standing partnership driven by innovation, technology, and a shared vision for excellence in architectural glass.
First-of-its-Kind 95k sqm Overseas Factory to Create 400 Jobs
CMS proxima is the automatic dry horizontal seaming machine designed to meet the needs of small to medium-sized glassworks looking to optimize their production process without making major investments.
At the Step Change event in connection to GPD 2025 in June, Miru Smart Technologies shared how their Vancouver-based team of 60+ designers, engineers & scientists is reshaping the future of smart windows.
SAINT-GOBAIN GLASS unveils its latest advancement in solar control: COOL-LITE® XTREME 51/23 and COOL-LITE® XTREME 51/23 II, the newest triple silver solar coated glass in annealed and to-be-tempered versions respectively.

Add new comment

NEWS RELATED PRODUCTS