HB3314 - Relating to certain energy efficiency performance standards for residential construction.

  89R958 MP-D     By: Harris H.B. No. 3314       A BILL TO BE ENTITLED   AN ACT   relating to certain energy efficiency performance standards for   residential construction.          BE IT ENACTED BY THE LEGISLATURE OF THE STATE OF TEXAS:          SECTION 1.  Chapter 388, Health and Safety Code, is amended   by adding Section 388.0045 to read as follows:           Sec.   388.0045.     RESIDENTIAL BUILDING ENERGY EFFICIENCY   PERFORMANCE STANDARDS FOR ATTIC AND RAFTER ASSEMBLIES. (a) This   section applies only to residential construction.             (b)     Notwithstanding any requirement contained in an energy   code adopted under Section 388.003(a) or (b), or a local amendment   adopted under Section 388.003(d), pertaining to the insulation of   unvented attic or unvented enclosed rafter assemblies, a local   jurisdiction shall consider an unvented attic or unvented enclosed   rafter assembly to be in compliance with the requirements of the   portion of the energy code administered and enforced by that local   jurisdiction pertaining to the insulation of unvented attic or   unvented enclosed rafter assemblies if:                 (1)     the attic or rafter assembly is insulated and air   sealed with air impermeable insulation to an R-value of at least:                       (A)     20 if the attic or rafter assembly is located   in climate zone 2 or 3; or                       (B)     26 if the attic or rafter assembly is located   in climate zone 4; and                 (2)     the building in which the attic or rafter assembly   is located:                       (A)     attains a blower door test result of less   than 3.0 ACH50;                       (B)     has a mechanical ventilation system that does   not rely solely on a negative pressure strategy;                       (C)     if insulation is installed below the roof   deck and the exposed portion of the roof rafters is not already   covered by air impermeable insulation to an R-value of at least 20   or 26, as applicable, has the exposed portion of the roof rafters   wrapped in insulation to an R-value of at least 3, except that the   rafters are not required to be covered by insulation if:                             (i)     the rafters are directly covered by   drywall or finished ceiling; or                             (ii)     continuous insulation is installed   above the roof deck; and                       (D)     contains inside the building's thermal   envelope the building's indoor heating, cooling, and ventilation   equipment, including ductwork.          SECTION 2.  This Act takes effect September 1, 2025.