Wall marks due to thermal bridging

Insulation · The Basics · printed page 236 (PDF page 237)

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Marks on Walls due to Thermal Bridging Thermal Bridging Causing Marks on Walls Marks due to Thermal Bridging

Text in the illustration

, which forms where studs form a thermal bridge
studs
insulation
air/vapor barrier
interior wall surface
dust particles collect on condensation, which forms where studs form a thermal bridge
even darker spots tend to form at nail heads (greater thermal bridging)
exterior sheathing and siding not shown

Generated explanation

The illustration shows a wood-framed insulated wall with a cutaway exposing studs, insulation, and an air/vapor barrier behind the interior wall surface. Vertical discolored bands on the interior finish follow the stud locations. The annotation explains that dust particles collect on condensation where the studs create thermal bridges. Darker spots at nail heads indicate greater localized thermal bridging. Exterior sheathing and siding are explicitly not shown.