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EERE » BTO » Building America » Solution Center Home » Image Gallery » This home’s double-wall structure consists of two 2x4 walls set two inches apart, then sheathed on the exterior and netted on the interior to create a 9.5-inch wall cavity that is filled with blown fiberglass insulation.

This home’s double-wall structure consists of two 2x4 walls set two inches apart, then sheathed on the exterior and netted on the interior to create a 9.5-inch wall cavity that is filled with blown fiberglass insulation.