As building performance requirements become more detailed, specifiers need confidence that declared thermal performance reflects the windows and doors selected for the project.

Ahead of updated Part L requirements coming into force in March 2027, Eurocell has worked with Windowmaker to integrate product-specific U-value and g-value calculations into its established quoting and compliance software.

Developed through a two-year collaboration, the solution incorporates more than 10,000 verified Eurocell performance data points. Calculations update automatically as the size and configuration of each window changes, providing more accurate outputs for certification and the wider compliance chain.

For architects and specifiers, this creates greater alignment between design assumptions, the products selected and the performance information provided through manufacture and supply.

Discover Eurocell’s product-specific calculation solution: https://www.eurocell.co.uk/blog/eurocell-launches-u-value-calculator-for-fabricators

Further reading: Getting U-values right – Glass Times

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