The Pros and Cons of Spray Foam Vs. Blown-In Insulation

When it comes to insulating your home, you have several options to choose from. However, two of the most popular options are spray foam and blown-in insulation. Both have their advantages and disadvantages, and choosing between them can depend on several factors. In this article, we will discuss the pros and cons of spray foam vs. blown-in insulation.

What is Spray Foam Insulation?

Spray foam insulation is a type of insulation made by mixing two types of chemicals that react and expand when they come in contact with each other. Spray foam insulation is applied using a special spray gun, which allows the insulation to fill the targeted space. There are two types of spray foam insulation: open-cell and closed-cell.

Pros of Spray Foam Insulation

  • Energy-efficient
  • Provides superior air sealing
  • Helps reduce noise
  • Long-lasting

Cons of Spray Foam Insulation

  • Can be expensive
  • Not easy to remove or replace
  • Not DIY-friendly

What is Blown-In Insulation?

Blown-in insulation is also known as loose-fill insulation. This type of insulation consists of small pieces of insulation material, such as fiberglass, cellulose, or mineral wool, which are blown or sprayed into the space that needs to be insulated.

Pros of Blown-In Insulation

  • Affordable
  • Easy to install, especially in pre-existing homes
  • Can easily be added to existing insulation
  • Can be removed or replaced easily

Cons of Blown-In Insulation

  • Can settle over time and lose effectiveness
  • May not provide superior air sealing
  • Can be messy during installation

Deciding between Spray Foam and Blown-In Insulation

Choosing between spray foam and blown-in insulation depends on several factors. Here are some of the factors to consider:


Spray foam insulation is more expensive than blown-in insulation. While the initial cost of spray foam insulation can be higher, it is energy-efficient and can help save money on energy bills in the long run.

Air Sealing

Spray foam insulation provides superior air sealing compared to blown-in insulation. Therefore, when it comes to reducing air infiltration, spray foam insulation is the better choice.

Noise Reduction

Spray foam insulation can help reduce noise transmission through walls and ceilings, making it the better choice for soundproofing.


Blown-in insulation is easier to install than spray foam insulation, especially in pre-existing homes. It can also be added to the existing insulation, which can help improve its effectiveness.


Spray foam insulation lasts longer than blown-in insulation and requires less maintenance.


Spray foam insulation and blown-in insulation each have their advantages and disadvantages. The choice between these two types of insulation depends on the homeowner’s priorities, the budget, and the size and shape of the area to be insulated. Whether you choose spray foam or blown-in insulation, the important thing is to ensure that your home is adequately insulated to reduce energy bills and improve comfort.

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