Envelope

Related Measures

• Nonresidential High Performance Envelope

  This code change proposal includes measures designed to improve building energy performance through envelope-related updates, like requiring vestibules for certain buildings (both new construction and additions) with high-traffic main entrances in all climate zones.

• Single-Family Buried Ducts

  This measure proposes a prescriptive alternative to high performance attics (HPA) to provide an alternative to adding insulation at the roof deck to reduce thermal losses from ducts in vented attics.

• Multifamily Envelope

  This CASE Report will focus on three measures that are grouped into the 'Envelope' category of building systems. These three measures work in conjunction to reduce the total amount of heat transfer that occurs in a building from the conditioned inside air to the outside ambient air.

• Multifamily Restructuring

  The multifamily restructuring CASE Report will propose changes to envelope and HVAC requirements that differ under 2022 Title 24, Part 6 between multifamily buildings up to three habitable stories and multifamily buildings four or more habitable stories.

• Single-Family High-Performance Envelope

  This measure targets the thermal performance of the building envelope, including a high-performance building envelope package of evaluating and developing prescriptive code requirements for roofs constructed as cathedral ceiling, evaluating savings potential and cost-effectiveness for cool roofs with higher reflectance and thermal emittance values, high-performance windows as prescriptive in some climate zones, and increasing mandatory wall insulation.