What Is Soffit | What Is Fascia | How To Install Soffit And Fascia

Soffit and fascia are two important architectural elements used when installing roofs. We often get confused with the terms soffit and fascia because they are usually mentioned together, but they are totally different components with separate uses. In this article, we will discuss what is soffit and fascia and how to install them.

What Is Soffit?

A soffit is the horizontal underside portion of a roof eave extended from the outside wall. In simple words, it is the exposed siding underneath your roof’s overhang.  Soffit is usually fitted with vents to permit air circulation within the attic and rafters.

soffit & fascia

Since the soffit is located on the underside of the roof, it is easily not visible in terms of curb appeal. However, it is still visible when you’re close to the house and when you’re underneath it or at street level.

Soffit is usually made according to the design and color of your house siding but can be different depending on the tastes and preferences of the homeowner.

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Different Types Of Soffit

Soffits can be made up of different materials. The various types of soffits are as follows:

  • Wooden Soffit
  • Aluminum Soffit
  • Steel Soffit
  • Vinyl Soffit
  • Fibre Cement Soffit
  • UPVC Soffit

It’s always important that the soffit material is suitable for your climate. You should choose the right soffit material to look great at the same time.

Why Is Soffit Important In House?

Soffit is important for the following reasons:

  • Soffit helps maintain a steady air circulation within the rafters and attic.
  • Keeps the house free from moisture buildup and condensation.
  • Prevents water accumulation, allowing it to sheet off and away from home. 
  • Reduces the risk of ice dams, mold, and decay.
  • Increases and improves energy efficiency.
  • It prevents birds, pests, bugs, and animals from entering the attic.
  • Soffit board draws excessive heat away from the house.
  • Gives better insulation to the house.
  • Soffit also guards under the eaves of the house and prevents unwanted things from blowing inside.

What Is Fascia?

Fascia is the side area located above the soffit. Sitting just above the soffit, fascia is mounted to the space where the roof connects the exterior walls of the house.

In simple words, it is the exposed horizontal board people see on the front of the roof’s overhang. Fascia is used to create a barrier between the roof’s edge and the exterior walls.

It creates a smooth appearance on the edge and protects the roof and home interior from weather damage. Fascia also provides support and carries eavestrough and gutter systems.

soffit & fascia


Fascia boards are commonly made of wood but also might be of vinyl, plastic, and aluminum. PVC, uPVC. Plastic and aluminum fascia is available in various colors.

Why Is Fascia Important In House?

The purpose of using Fascia are as follows:

  • Fascia helps protect the house from strong weather conditions like wind and rain.
  • It prevents water accumulation and moisture build-up under the roof boards.
  • It provides better insulation.
  • Fascia board draws heat away from the house.
  • It improves home aesthetics and curb appeal.
  • Fascia provides better support to the gutter systems and bottom row of shingles.
  • It protects the ends of the rafters.
  • It prevents mold and decay.

How To Install Soffit And Fascia In Home?

The step-by-step process of installing the soffit and fascia is as follows:

1. Determine The Soffit Area

Measure and calculate the total area to know the required soffit area.

2. Prepare The Area

The steps to prepare the area are as follows:

  • Check surfaces to ensure that they are uniform and straight.
  • Reattach any loose boards or shingles.
  • Remove any existing trim and dust.
  • Remove gutters.

3. Install Receiving Channels

You can use F-channels or J-channels receiving channels, But remember they need to be attached by nails every 12 inches along the wall.

If the soffit turns a corner, install the channels with a 1/4-inch gap to permit expansion at the walls. Do not overdrive fasteners.

4. Cut the Soffit Panels

The soffit panels must be cut to the appropriate length to fit the area being covered.

  • First, measure the distance from the wall to the fascia and subtract half an inch to permit movement.
  • Use a circular saw to cut the panels into the required size.

5. Install Soffit

Now, it’s time to install the soffit. Install the soffit panels one by one.

  • Insert the soffit panel into the channel and ensure that the panel forms a 90-degree angle with the wall.
  • Nail up the panel. 
  • Repeat these steps for each soffit panel.

6. Finishing

After installing the soffit panels, apply utility trim and fasten using trim nails.

When To Replace Soffit And Fascia?

Well, to know when to replace your soffit and fascia, you will need to perform a close inspection. Use a ladder to check closely if there is water damage, cracking paint, or warped panels.

Soffits made up of aluminum can become rusted, causing holes and damage. If you discover any of these, it’s time to replace your soffit and fascia.


The soffit and fascia systems are complementary and contribute to the protection of your roof. These systems are optional, but their installation is very easy and low-cost. They also protect your house against potential problems. It is a good way to prevent heavy repair costs.

Also Read

Types Of Roof Tiles

Components Of Building

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