The bill, S.B. No. 2102, introduces new energy efficiency performance standards specifically for residential construction in Texas. It amends Chapter 388 of the Health and Safety Code by adding Section 388.0045, which outlines compliance requirements for unvented attic and unvented enclosed rafter assemblies. Under this new section, local jurisdictions must consider these assemblies compliant with energy code requirements if they meet specific insulation and air sealing criteria, including achieving a minimum R-value for insulation based on climate zones and passing a blower door test for air leakage.

Additionally, the bill specifies that buildings must have a mechanical ventilation system that does not rely solely on negative pressure and outlines conditions under which insulation requirements for exposed roof rafters can be waived. The legislation aims to enhance energy efficiency in residential buildings, thereby potentially reducing energy consumption and improving indoor air quality. The provisions of this act will take effect on September 1, 2025.

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