89R958 MP-D
By: Campbell S.B. No. 2102
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.