How do you replace the soffit on a whole house?
Short answer. A full soffit replacement goes in order: remove gutters where needed, take down the old soffit and trim, repair rotten framing and fascia, install nailers and channels, put up vented panels, wrap or replace the fascia, then rehang gutters and add baffles in the attic so the new intake works. Timing it with a roof replacement lets the drip edge and gutters be set correctly at the same time.
Plan the project
- Material: vinyl, aluminum or fiber cement, chosen with the fascia.
- Venting: vented panels along the eaves, solid panels where there is no attic behind, such as porches.
- Color: soffit and fascia often match the trim; HOAs may have rules.
The sequence
- Gutters down where they block the fascia.
- Old soffit off. If vinyl is going over existing plywood, cut vent openings in the plywood instead of removing it.
- Inspect framing: rafter tails, sub fascia and lookouts. Repair or sister rot before covering it.
- Install nailers and channels: J or F channel along the wall, support at the fascia end.
- Hang the panels with expansion gaps, vented sections where the attic needs intake.
- Fascia: new boards or aluminum wrap over sound wood.
- Gutters back up, pitched correctly with the drip edge lapping into them.
- Attic side: baffles in each bay so insulation does not block the new vents.
DIY or hire?
Single story ranch eaves are manageable for a skilled homeowner. Two story eaves, steep lots and rotten framing call for a pro with staging. Expect hidden rot on older homes; ask contractors for a unit price for any found.
Why timing with the roof helps
Drip edge and gutter apron details at the roof edge decide whether new fascia stays dry. See drip edge explained and gutter sizing and guards.