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Sustainable building services for ARCHITECTS, SELF-BUILD and DEVELOPERS/BUILDERS. Low Carbon Box are accredited assessors and consultants for energy assessments, Passivhaus, air tightness testing, Planning energy statements and more.

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Blog

What overheating assessors actually need...

What overheating assessors actually need from a noise report — and why vague briefs cost money Noise reports that...

Blog

WHY YOUR WINDOW SPEC JUST...

Part L 2026 has landed, and the headline window target looks reassuringly familiar — 1.2 W/m²K for windows with...

Blog

Part O overheating: a plain-English...

Building regulations changed in 2022. Every new home built in England now has to pass an overheating check —...

Blog

Reducing Overheating Risk: Cavity vs...

Reducing Overheating Risk: Cavity vs Timber Frame Understanding how construction methods impact thermal performance is critical for meeting TM59...

Blog

Part O Overheating – Common...

Part O Overheating – Common Questions Part O Overheating of the Building Regulations has applied to new homes since...

Blog

Photographic Evidence for Part L1...

Photographic Evidence for Part L1 2021 We hope this is a helpful guide for photographic evidence now required for...