Blown-in insulation is installed by using a blowing machine to shoot the insulation material into the desired area. The types of blown-in insulation include cellulose, fiberglass, and mineral wool. Cellulose insulation is made from recycled paper and is the most common type used for blown-in insulation. Fiberglass insulation is made from glass fibers and is also commonly used for blown-in installation.

Spray foam and fiberglass blown insulation are two common types of insulation materials used in buildings, and they have several key differences:

1. Material Composition:
   • Spray Foam: Spray foam insulation is typically made from two types of chemicals that are mixed and sprayed onto surfaces. These chemicals react and expand to create a foam that fills gaps and seals spaces.
   • Fiberglass Blown Insulation: Fiberglass blown insulation is made from tiny glass fibers that are blown or installed into wall cavities, attics, or other spaces using special equipment.
2. Installation Method:
   • Spray Foam: Spray foam insulation is applied as a liquid that expands and hardens into a solid foam. It can be sprayed directly onto surfaces and is often used for air sealing, filling gaps, and insulating irregularly shaped spaces.
   • Fiberglass Blown Insulation: Fiberglass blown insulation is installed by blowing loose fibers into cavities using specialized equipment. It is commonly used for insulating attics and wall cavities.
3. R-Value:
   • Spray Foam: Closed-cell spray foam typically has a higher R-value per inch compared to open-cell spray foam. This makes it more effective at insulating and providing a higher level of thermal resistance.
   • Fiberglass Blown Insulation: The R-value of fiberglass blown insulation depends on the thickness and density of the material, but it generally has a lower R-value per inch compared to closed-cell spray foam.
4. Air Sealing:
   • Spray Foam: Spray foam provides an effective air seal when properly applied. It can help prevent drafts and air leakage, which can improve energy efficiency.
   • Fiberglass Blown Insulation: Fiberglass blown insulation may not provide as tight of an air seal on its own, but it can still be effective when combined with other air sealing measures.
5. Moisture Resistance:
   • Spray Foam: Closed-cell spray foam is relatively impermeable to moisture and can act as a moisture barrier. Open-cell spray foam is less resistant to moisture and may require additional moisture control measures.
   • Fiberglass Blown Insulation: Fiberglass insulation is not a moisture barrier and can retain moisture if it becomes wet, which may require replacement if it gets saturated.
6. Cost:
   • Spray Foam: Spray foam insulation is generally more expensive upfront compared to fiberglass blown insulation due to the cost of materials and installation.
   • Fiberglass Blown Insulation: Fiberglass blown insulation is often more cost-effective in terms of material and installation costs.

The choice between spray foam and fiberglass blown insulation depends on various factors, including your budget, insulation goals, and the specific requirements of your building. It’s often a good idea to consult with a professional insulation contractor to determine the best insulation solution for your project. Additionally, building codes and regulations in your area may also influence your choice of insulation material.

Spray foam insulation provides various benefits such as improved energy efficiency, reduced air and moisture infiltration, and enhanced noise reduction. When compared to other types of insulation installations, spray foam insulation may have higher upfront costs but can lead to significant cost savings in the long run due to its superior insulation properties. According to a study by the Spray Polyurethane Foam Alliance, homeowners can save up to 40% on their monthly energy bills by switching to spray foam insulation. Additionally, spray foam insulation can increase the resale value of a home and provide a better return on investment than other forms of insulation.

Spray foam insulation is generally regarded as more effective than other types of insulation, such as fiberglass or cellulose. This is due to its ability to form an airtight barrier.

Not all spray foam is the same. Open cell spray foam is comparable to the fiberglass in it’s R-Value, while closed cell spray foam almost doubles the R-value per inch of thickness. However, the cost of closed cell spray foam insulation is typically higher than other types, so it may not be the best choice for every situation. It is important to consider factors such as budget and specific insulation needs when making a decision.