Tarmac is lobbying the UK government to include embodied carbon in the Future Homes Standard, warning that the climate footprint of building materials risks being omitted from upcoming residential regulations. The construction materials producer argues that excluding embodied CO₂ – emissions from manufacturing, transport and installation – would undermine the policy's environmental credibility and favour materials with higher lifecycle emissions. Tarmac's campaign highlights a regulatory gap: while operational energy use faces stricter rules, the carbon locked into concrete, steel and insulation often escapes scrutiny. The firm positions the push as industry self-regulation, though critics note suppliers with lower-carbon portfolios stand to gain competitive advantage if embodied emissions become mandatory reporting.