consturction engineers

Event
Built Environment

BS 40104: The New Standard for Retrofit Assessment

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Supporting quality and consistency in domestic retrofits

Introducing BS 40104:2025 at Net Zero Week, risk-based retrofit assessments ensuring consistency, quality and best practice in UK housing.

Aligned with and expanding on PAS 2035.
Comprehensive guidance on detailed retrofit assessment.
Supporting safer, healthier and more energy-efficient homes.
Clear use cases for assessors, coordinators, manufacturers and specifiers.

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