© Copyright CalCERTS, Inc. 2019
Code Cycle: 2016 & 2019 Standards
Reference: RCM 3.6.6
Reference: Advanced Framing Guide (see attachment)
Advanced wall systems (AWS), also known as optimum value engineering (OVE) or advanced framing, refer to a set of framing techniques and practices that minimize the amount of wood and labor necessary to build a structurally sound, safe, durable, and energy-efficient building. AWS improves energy and resource efficiency while reducing first costs.
Reducing the amount of wood in wood-framed exterior walls improves energy efficiency through a
reduced framing factor, allowing more insulation to be installed, and has greater resource efficiency for the materials being used. In addition, using fewer framing studs reduces the effects of “thermal bridging” and increases the amount of insulation in the wall, resulting in a more energy-efficient building envelope. The framing factor assumed for calculating the energy performance of a wood-framed 2x4 wall at 16” on center is 25 percent. When AWS is used, the framing factor is reduced to 17 percent, reflecting the improved energy performance of the advanced wall system.
Below are a few photos that highlight the most problematic areas for a HERS Rater to inspect. Using these advanced techniques will make inspections easier and will make the building cavity more efficient.
For more tips and techniques, please download the advanced framing guide attached.