How should loft insulation evidence align with your EPC in England and Wales?

Bridging certificates and reality

An EPC depends on evidence available at assessment. If you upgrade loft insulation after the last certificate, the register can lag until a new assessment.

Evidence worth keeping

Product specification for rolls or loose fill, and depth achieved in open areas.

Photos of depth markers if your surveyor recommends them.

Boarding notes because compressing insulation changes performance.

Completion Score angle

Accurate Documents help your Property Passport show work completed even if the formal EPC update schedules later.

Using Property Passport UK

Start from the address on [Property Search](/search). When you own or manage the home, [claim your Property Passport](/claim/start) and upload Documents with clear dates and sources. Browse more explainers in the [Property Guides library](/guides). This article is general information, not legal, tax, mortgage, or survey advice.