Attic insulation and ventilation upgrade in Duluth

This Duluth attic had thin, uneven insulation and a bathroom fan blowing warm, wet air into the soffit. We ran the fan outside, fixed the attic ventilation and blew in new fiberglass insulation to bring the attic up to a modern R-value. The work was permitted and inspected.

What we found

• Thin, uneven fiberglass batts between the ceiling joists.
• A bathroom exhaust fan venting into the soffit. That pushes warm, moist air right under the roof edge, where it can cause frost on the roof deck and ice dams.
• Attic ventilation that needed correcting.

What we did

1. Ran the bath fan through a new exhaust tube to a gooseneck flashing on the roof, so it vents outside instead of into the soffit.
2. Corrected the attic ventilation.
3. Blew in fiberglass insulation over the old layer to bring the whole attic floor up to a modern R-value.
4. Pulled the permit and passed the inspection.

Before the work