Energy codes

Straightforward guidance for planning materials, preparing the work, and knowing when to confirm local requirements.

Insulation board samples, air-sealing materials, blank documents, and a blank United States reference card are arranged for neutral project planning.

2026 Residential Energy-Code Updates: What Insulation DIYers Need to Verify Locally

Understand the 2026 state-review context for the 2024 IECC, why adoption and enforcement vary, and how to use insulation estimates without treating planning guidance as local code.

BuildListCalc Editorial Team · 9 min · August 3, 2026