Energy codes and where panel walls sit in them
The IECC sets envelope requirements by climate zone, and each cycle raises them. A wall can comply prescriptively, by trade-off, or by whole-building performance, and a high-performance envelope usually wins on the third route.
Three ways to comply
The prescriptive path gives a table: this climate zone needs this cavity R-value plus this continuous insulation. It is simple and unforgiving.
The trade-off path lets a better wall pay for a worse window. The performance path models the whole building against a reference and only asks that yours use less energy. A very good envelope earns the most credit on the performance path, because the model sees the actual assembly rather than a table row.
Why continuous insulation keeps appearing
Successive code cycles have added continuous insulation requirements above cavity insulation, precisely because the framing factor was making nominal values meaningless. Steel-framed assemblies carry the heaviest continuous insulation requirements of all, because steel bridges worst.
A panel with a continuous core answers that requirement in its construction rather than as an added layer.
Above code
Passive house, net zero and the various green programmes all sit above code and all begin with the envelope. A building that meets them has usually solved the code question several times over.
What Guardian publishes
-
Guardian states the panels are PHIUS, LEED and Net Zero capable designs, and that the system can be designed to meet or exceed all code requirements for structural and fire safety.
Source · Differentiation sheet; 3-Part Specification 1.6 B
Go deeper
Written by Data Subsystems, for Guardian Structural Technologies. Last updated .
Drafted from Guardian Structural product literature and published building-science sources. Awaiting Guardian technical review. Confirm any figure against the current product documents or ask us before you rely on it in a design.