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The duct for this exhaust fan is properly routed through the roof and the duct is insulated

The duct for this exhaust fan is properly routed through the roof and the duct is insulated

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This exhaust fan duct is properly insulated and is properly vented through the roof

This exhaust fan duct is properly insulated and is properly vented through the roof

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The attic is sealed and insulated along the underside of the roof deck with 5.5 inches of polyurethane spray foam, providing conditioned space for the HVAC system.

The attic is sealed and insulated along the underside of the roof deck with 5.5 inches of polyurethane spray foam, providing conditioned space for the HVAC system.

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Right - Open-cell polyurethane spray foam to R-28 on underside of roof turns new attic into conditioned space for HVAC.

Right - Open-cell polyurethane spray foam to R-28 on underside of roof turns new attic into conditioned space for HVAC.

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No Sweat, BSI-094

Reference

Guide providing information on controlling attic ductwork sweating.

Venting Vapor, BSI-088

Reference

Guide providing information on controlling attic ductwork sweating.

Small Commercial Building Fact Sheet - Building Envelope

Reference

Fact sheet describing building envelope performance measures applicable to residential and small commercial construction.