What is Soffit and Why Does My Home Need It?

What is Soffit and Why Does My Home Need It?

If a roof had an underbelly, soffit would be it.

Soffit comes from the Latin word suffixus meaning fixed underneath which perfectly describes where a soffit is located on your home.

It’s not made to stand out or be flashy, but exterior soffit has its role nevertheless.

Where is soffit?

Soffit is the material between the roof’s eaves where the fascia and gutters are placed to the wall. Roofs that do not have overhangs do not have soffits.

Stand just outside your front door and look up. Do you have what looks like your home’s siding that veers out from the facade of your home? You’ve found your home’s soffit.

Why does my home need soffit?

Soffit acts as a passive ventilation unit for your attic. It keeps warm moisture in the air from entering the attic air and condensing and creating mold.

Before soffit became a popular method of circulating air though a roof area, homes used gable vents or a hood vent to create air flow. The problem is they didn’t circulate all the air, just the air in specific locations and mold would grow in the insulation where it didn’t circulate.

Soffit outlining the roofline allows for continuous ventilation and is one of the most effective ways to ventilate into the attic. Air from the soffit cycles to the vents to draw heat and moisture away from the house. Moisture is mold’s breading ground and the cause of roof rot and poor air quality.


The soffit also helps keep pests from slipping into your home through the roofline or gutters and nesting in your attic. In addition to failing to pay rent, animals can cause damage to your roof and things like your electrical systems as well as contribute to unhealthy air quality.


What type of soffit is right for my home?

At Thompson Creek often our customers choose to replace a roof, gutters, soffit and trim at the same time for the best result. This enables our Thompson Creek roofing experts to make sure your whole roofing system is working together to maximize the life cycle and health of the roof. There are several signs pointing to a failing roof including, high energy bills, ceiling stains, shingle wear and sagging.

While soffit comes in wood and aluminum, they are most commonly made of vinyl for durability.

Soffit can be non-vented or vented to allow for maximum roof ventilation. Non-vented or continuous soffit works best when your roof has narrow eaves or if you need to ventilate a large amount of attic space. Vented soffit panels are good with a wider eave and a smaller amount of attic space because they have smaller vents between solid panels.

What is the upkeep on a soffit?

Vinyl soffit need little maintenance so long as they are installed correctly.

Here’s what you can do to prolong the life of your roofing system:

  •      keep gutters clean and free of debris
  •      size gutters correctly for the roof size
  •      keep soffit well-sealed and caulked
  •      check soffit for bees, hornets and wasp nests
  •      make sure your attic fan is in working order and cleaned
  •      remove any mildew on soffits using a soft brush and a solution of bleach and water.

Soffits can both complement the architecture and look of your home while serving to help keep your whole roofing system working properly.

Our expert roofing technicians at Thompson Creek use a specially designed roofing system that offer homeowners layers of protection. And your investment is protected by our Thompson Creek No-Hassle Warranty and Buyer Protection Guarantee. Call Thompson Creek at 888-696-7105 for a no-obligation quote today.

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