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When Is Insulation Required on Air Ducts?

Many HVAC systems require a quality air duct system to move cooled or heated air throughout the home or facility. Insulation is often required for such ductwork.

In this blog post, the insulation experts at Gold Star Insulation explain how insulation works with your property’s air ducts, why it’s important and when it’s required for your air ducts.

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What Is Air Duct Insulation?

Air duct system in a home's crawl space.When your ductwork moves air throughout your home or business, there’s the potential for leaks and energy transfer. Cool air can get warmer, and warm air can get cooler as it passes through your air ducts.

Insulation seals the ductwork against leaks and protects against energy transfer so that by the time it reaches the top floor of your house, it’s still just as cool or warm as it was when it left the HVAC unit in your basement.

Why Air Duct Insulation Is Important for Your Home

Air duct insulation in your home is important for many reasons:

  • Proper insulation prevents moisture leaks and condensation.
  • It promotes the longevity of ducts, pipes and vents.
  • It enables better airflow control.
  • It enhances ductwork efficiency.
  • It helps keep energy bills to a minimum.
  • It keeps duct maintenance to a minimum.
  • It reduces HVAC noise.

Commercial Air Duct Insulation Requirements

The ductwork that services workspaces, offices, warehouses and other commercial facilities is critical to the businesses that use it. Without reliable air ducts, your heating and cooling systems couldn’t do their jobs and you’d be wasting a lot of money on related monthly expenses.

Duct systems without proper insulation can lose as much as 30% of their energy. That’s why there are multiple codes and regulations that, when applied, promote safety and efficiency.

Contact your commercial duct insulation provider for details about what requirements apply in your area.

  • ASHRAE 90.1-2007 and 2010
  • Climate zones (Sacramento is in zone 12)
  • Internal Energy Conservation Code (IECC) 2009 and 2012
  • International Mechanical Code (IMC) 2009 and 2012
  • R-value indicating rating of effectiveness (the higher the value, the greater the efficiency) of the insulation material

Schedule an Air Duct Inspection To Learn More

Scheduling an air duct inspection from Gold Star Insulation will identify where insulation is required, such as at joints or in unconditioned areas of the property like the attic or basement.

Our well-trained, highly skilled insulation professionals can also help identify whether you have enough insulation or if damaged ducts need to be replaced.

Based on our wide array of insulation materials, we can recommend specific products to fit your requirements and budget. We’ll also make sure your insulation complies with applicable regulations and is as energy-efficient as possible.

Insulation products and solutions we provide include:

  • Radiant barrier insulation
  • Air sealing
  • Duct replacement
  • Rigid foam insulation
  • Fiberglass insulation
  • Cellulose insulation

Call 916-229-8445 to learn more about insulation services from Gold Star Insulation in the Sacramento area.

Where should you insulate in your home? Check out our interactive infographic:

Products We Install
Energy Audits

Our team can help you save money with a home energy audit and air sealing services.


Our insulation team installs batt and blown-in fiberglass insulation.


Environmentally friendly and effective, cellulose works well in homes and buildings.

Spray Foam

Gold Star Insulation is a leading installer of spray foam insulation in the Sacramento area.

Radiant Barrier

An attic radiant barrier can help keep your home cooler and more comfortable.

Insulation Removal

Gold Star Insulation provides home insulation removal services.

Air Sealing

We are committed to saving you money by sealing your attic—which is the main source of air leaks in the home.

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