R-Value / U-Value

Insulation effectiveness is commonly measured by R-value, which quantifies a material's resistance to heat flow. However, real-world performance can differ significantly from reported R-Values due to factors like thermal bridging, air infiltration, and installation imperfections. For instance, a 2×6 wall with R-19 fiberglass insulation may only achieve an effective R-value of R-13.7 when accounting for thermal bridging through the studs. In contrast, Structural Insulated Panels (SIPs) provide continuous insulation with minimal to zero thermal bridging, maintaining their full R-value over time and outperforming traditional fiberglass insulation in energy efficiency.

Building codes offer two primary compliance paths: R-values (prescriptive) and U-factors (performative). While R-value specifies the thermal resistance of individual insulation layers, U-factor measures the overall heat transfer rate of a complete wall assembly. 

Snap-N-Lock™ Structural Insulated Panels are particularly effective in meeting U-factor requirements, offering a viable alternative to traditional construction methods. By understanding and applying both R-value and U-factor considerations, builders and designers can achieve optimal insulation strategies that comply with building codes and contribute to energy-efficient construction.