Soffit and Fascia: What They Are and How They Differ
Fascia is the board along the roof edge that the gutters hang on; soffit is the panel under the overhang, between the fascia and the wall. Together they close off the eave, keep water and pests out of the roof edge and attic, and, where the soffit is vented, let air into the attic. Most homes have 100 to 200 linear feet of them. This guide covers the parts of an eave, the difference between them, materials and lifespans, venting and the signs of damage.
Parts of an eave
An eave in cross-section. Schematic, not to scale.
The board along the roof edge, fixed to the rafter tails. The gutters hang on it.
The panel under the overhang, from the fascia back to the wall. Solid or vented.
Metal flashing over the top of the fascia that sheds water off the roof edge.
Fastened to the fascia, so rotted fascia can show up as sagging gutters.
Openings in the soffit that let outside air into the attic.
The trim along a sloped gable edge, also called a barge board; it usually carries no gutter.
Price new soffit and fascia for your eaves with the soffit and fascia cost calculator.
Replacing yours?
Soffit and fascia are priced by the linear foot of eave. These two tools price the trim and the gutters on it.
What is a soffit?
A soffit is the underside of the roof overhang. HomeGuide describes it as the siding under the eaves, visible when you stand below the overhang, running from the roof edge back to the outside wall. It closes off the space between the rafter tails so birds, insects and weather cannot get into the roof edge, and it finishes the look of the eave. Soffit panels usually come in 8 to 12 foot lengths, 1 to 2 feet wide, either solid or vented. Vented soffit has small openings or a continuous perforated strip that lets outside air into the attic, which is covered below.
What is fascia?
Fascia is the horizontal trim board along the roof edge, fastened across the ends of the rafters or trusses and parallel to the wall. It is what the gutters are attached to, so from the ground it is often hidden behind them. Some eaves have a sub-fascia, a framing board behind the finished fascia. Along the top, the roof’s drip edge laps over the fascia: the 2024 International Residential Code requires a drip edge at the eaves and rakes of shingle roofs, extending at least 1/4 inch below the roof sheathing and 2 inches back onto the deck, with the underlayment lapped over it at the eaves (Section R905.2.8.5). That metal edge carries roof water past the top of the fascia board.
Fascia can be wood, vinyl, aluminum, composite or fiber cement. A wood fascia can also be wrapped, or capped, in aluminum, which HomeGuide says shields the board from water and extends its life.
Soffit vs fascia: the difference
| Soffit | Fascia | |
|---|---|---|
| Where | Under the overhang, wall to roof edge | Along the roof edge |
| Faces | Down | Out, parallel to the wall |
| Main job | Closes the underside of the eave; vents the attic when vented | Caps the rafter tails and carries the gutters |
| Seen from the ground | When standing under the eave | Partly, behind the gutter |
| Installed cost | $4 to $22 per linear foot | $5 to $12 per linear foot |
The two are installed and priced together because together they make up the eave: HomeGuide puts the whole eave at $9 to $34 per linear foot. Our soffit and fascia cost page breaks that down by length, soffit width and material, with repairs.
Rake boards and the rest of the eave trim
On a gable roof, the sloped edges at the gable ends get their own trim. HomeGuide calls these rake boards, also known as barge boards: front-facing trim at the edge of the gable that typically carries no gutter and often comes in decorative designs that accent the peak. The drip edge runs along the rakes as well as the eaves, but at the rakes the IRC puts the underlayment under the drip edge rather than over it.
Soffit and fascia materials and lifespans
Material prices per linear foot, before installation, from HomeGuide:
| Material | Fascia | Soffit, 1 ft wide |
|---|---|---|
| Vinyl or PVC | $1.50 to $5.00 | $1.00 to $2.50 |
| Aluminum | $1.25 to $4.00 | $2.00 to $3.50 |
| Wood or cedar | $2.00 to $5.00 | $1.50 to $4.50 |
| Fiber cement | $1.00 to $2.00 | $2.00 to $4.00 |
| Composite or engineered wood | $4.00 to $7.00 | $1.00 to $2.00 |
HomeGuide notes that wood is the most popular fascia but does not resist water damage as well as vinyl, composite or fiber cement, that vinyl and aluminum are typically the cheapest trim and cedar the most expensive, and that vinyl, wood and aluminum soffit and fascia last 10 to 20 years on average while steel and fiber cement last 30 years or more. Installation quality, climate and upkeep decide where in those ranges a given eave lands.
Vented soffit and attic ventilation
In a vented attic, the soffit is normally where outside air comes in. The code requires enclosed attics to be cross ventilated (Section R806.1), with openings between 1/16 and 1/4 inch or screened, and protected against birds, rodents and snakes, and the usual balanced system pairs intake vents in the soffit with exhaust vents near the ridge. Our attic ventilation guide explains how that works, and the attic ventilation calculator works out how much intake vent area your attic needs.
A vented soffit only works if air can get through it. ENERGY STAR calls covering soffit vents with insulation the most common insulation mistake and recommends rafter vents, or baffles, behind them. IIBEC lists soffit vents that are blocked by insulation, clogged with debris, or installed over a solid substrate among the most common ventilation faults. HomeGuide prices continuous vented soffit panels at $0.50 to $2.00 per foot, and adding vents to existing soffit at $15 to $30 each or $2.50 to $4.00 per foot for continuous strips.
Signs of soffit and fascia damage
HomeGuide’s roof repair guide notes that fascia and soffit boards protect the roof structure and support the gutters, but often rot from water damage. Things to look for from the ground and a ladder:
- Rot or soft spots in wood fascia or soffit, the water damage HomeGuide says these boards often suffer.
- Peeling paint and stains on wood trim.
- Gutters pulling away from the roof edge, since the fascia is what holds them.
- Holes, cracks and gaps where birds, wasps or rodents can get in; HomeGuide prices nest removal at $125 to $700.
- Sagging or missing soffit panels, which leave the roof edge and attic open.
Small problems can be painted, caulked or patched; HomeGuide puts a typical soffit and fascia repair at $500 to $2,600. For rotted boards, its roof repair guide notes that patching may work for small holes but most professionals recommend replacing the damaged boards. If the damage runs along the roof edge, our signs you need a new roof checklist helps decide whether the roof itself needs attention.
What this guide does not give
- An inspection. Rot behind the fascia, in the rafter tails or roof deck, only shows once the trim is off.
- Installation instructions. Follow the trim manufacturer’s instructions for the product you buy.
- Wildfire rules. Some areas have extra requirements for vents and enclosed eaves; your building department knows them.
Sources
- HomeGuide soffit and fascia replacement cost guide, dated November 7, 2025: definitions, rake boards, panel sizes, materials and prices, lifespans, vents and repairs.
- HomeGuide roof repair cost guide, dated February 9, 2026: why fascia and soffit rot, and patching versus replacing.
- 2024 International Residential Code, Chapter 9, Section R905.2.8.5: drip edge.
- 2024 International Residential Code, Chapter 8, Section R806.1: attic ventilation openings.
- ENERGY STAR, About Attic Ventilation: soffit vents, insulation and rafter vents.
- IIBEC, Attic Ventilation 101, 2019: common soffit vent faults.
- All read on November 4, 2026. The diagram is our own schematic. Every source is listed on the methodology page.
Related calculators and guides
Soffit and fascia FAQ
What is a soffit on a house?
The panel on the underside of the roof overhang, between the fascia at the roof edge and the outside wall. It is the part of the eave you see when you stand under it, and when it is vented it lets outside air into the attic.
What is fascia on a roof?
The horizontal board that runs along the roof edge, fixed to the ends of the rafters or trusses. The gutters are fastened to it and the drip edge laps over its top, so from the ground it is often hard to see behind the gutter.
What is the difference between soffit and fascia?
Position and job. Fascia stands upright at the edge of the roof, parallel to the wall, and carries the gutters. Soffit lies flat under the overhang, bridging from the fascia back to the wall, and closes off the eave from below. Together they form the eave.
Are soffit and fascia part of the roof?
They are the trim at the roof edge rather than the roof covering. HomeGuide lists roofing companies, gutter specialists, home improvement stores and siding contractors among the trades that repair them.
How long do soffit and fascia last?
HomeGuide says vinyl, wood and aluminum soffit and fascia last 10 to 20 years on average, and steel and fiber cement 30 years or more, depending on installation quality, climate and maintenance.
What is a rake board?
The trim along the sloped edge of a gable roof, also called a barge board. Unlike fascia it faces forward on the gable end, usually carries no gutter, and is often shaped to accent the peak.
Do soffits need to be vented?
Not always, but in a vented attic the soffit is usually where the intake air comes in. The building code requires enclosed attics to be cross ventilated unless they are built as unvented attics, and soffit or eave vents are the standard low vents in a balanced system.
What is the best material for soffit and fascia?
It depends on budget and climate. HomeGuide notes that wood is the most popular fascia but resists water worse than vinyl, composite or fiber cement, that vinyl and aluminum are typically the cheapest, and that steel and fiber cement last longest, 30 years or more.
What is a drip edge?
Metal flashing along the roof edge that laps over the fascia. The IRC requires it at the eaves and rakes of shingle roofs, extending at least 1/4 inch below the roof sheathing and 2 inches back onto the deck.