In this short video, Tim explains what sits behind CarbonLite and why a performance‑based approach to retrofit can deliver far better outcomes than Building Regulations. The conversation explores how the standard provides a clear, measurable pathway to creating homes that are more comfortable, healthier and genuinely energy efficient.

Rather than focusing on minimum compliance, CarbonLite is about designing and delivering buildings that actually perform. The video also touches on how to get started, and how the AECB supports projects through certification and guidance.

Hannah Dixon is a CarbonLite Certifier at Progress in Practice in Manchester. In this video she describes the complexity of two projects that she has worked on in the area, one using wood fibre internal insulation (IWI), the other using external (EWI). She cover complex airtightness measures, filling chimneys, ventilation systems, windows and more.

In order to maintain the integrity of the standards and ensure consistency of application, the AECB uses Approved Certifiers to confirm that projects have met the AECB CarbonLite Standards.

All our certifiers are AECB members, approved by us to carry out project certification.  Certifiers undertake regular AECB CarbonLite CPD.

• The AECB Standards are based on the Passivhaus methodology, and certifiers use the Passivhaus Planning Package software (PHPP)
• The certifier may choose to appoint a separate PHPP modeller as part of their certification service, or may do this in-house
• Once modelled in PHPP, certifiers use the AECB CarbonLite LEBD Uploader software to collate project data and evidence and automatically upload the certified project to the Low Energy Buildings Database