Spray Foam Vs. Fiberglass Insulation In Metal Buildings: What’s The Difference?

Spray foam insulation vs. fiberglass insulation are two common types of insulation used in metal buildings. While both are effective in reducing heat loss and increasing energy efficiency, there are significant differences between the two in metal buildings:

Installation Process

The installation process for spray foam insulation and fiberglass insulation differs significantly. Spray foam insulation is applied as a liquid, which expands and hardens to form an airtight seal, while fiberglass insulation is installed in batts or rolls between the studs. The application of spray foam insulation requires special equipment and training, while fiberglass insulation can be installed with basic tools and knowledge.

Air Sealing

One of the main benefits of spray foam insulation is its ability to act as an air barrier, effectively sealing gaps and cracks in the building envelope. Fiberglass insulation, on the contrary, is not an effective air barrier and can allow air to leak through the building envelope, reducing energy efficiency.

Energy Efficiency

Both spray foam insulation and fiberglass insulation can improve the energy efficiency of a metal building by reducing heat loss and improving thermal performance. Nevertheless, fiberglass insulation has a lower R-value than spray foam insulation, meaning less insulation is provided per inch of thickness. Because of this, spray foam insulation is more effective in hot and cold climates.

Moisture Resistance

Spray foam insulation is impermeable to moisture and can help prevent moisture buildup in the building envelope, while fiberglass insulation can absorb moisture and promote mold growth if it becomes wet. This makes spray foam insulation a better choice for metal buildings in areas with high humidity or moisture.

Longevity

Spray foam insulation has a longer lifespan than fiberglass insulation, with a typical lifespan of 20-30 years compared to 10-20 years for fiberglass insulation. Spray foam insulation also maintains its R-value over time, while the R-value of fiberglass insulation can deteriorate over time.

Cost

Spray foam insulation is generally more expensive than fiberglass insulation, both in terms of materials and installation costs. However, the higher initial cost of spray foam insulation can be offset by its long-term energy savings and durability.

Environmental Impact

Compared to spray foam insulation, which is made from petrochemicals, fiberglass insulation is more environmentally friendly because it is made from recycled glass and sand. However, spray foam insulation can help reduce energy consumption and greenhouse gas emissions, making it a more environmentally friendly option in terms of energy efficiency.

Noise Reduction

Compared to fiberglass insulation, spray foam insulation has better noise reduction capabilities. To lessen sound transmission through walls and ceilings, spray foam insulation can expand to fill spaces and cavities.

Pest Resistance

While fiberglass insulation doesn't offer any protection from pests like rodents and insects, spray foam insulation can. This makes spray foam insulation a better choice for metal buildings in areas with a high risk of pest infestations. Moreover, spray foam insulation does not contain any organic material that pests can feed on, making it even more resistant to infestations. This can help prevent costly damage to the building caused by pests, as well as reduce the risk of health problems associated with pest infestations. Choosing spray foam insulation for your metal building can provide long-lasting protection against pests and the damage they can cause.

Ease of Maintenance

In comparison to fiberglass insulation, spray foam insulation requires little to no maintenance, whereas fiberglass insulation may need to be replaced if it gets wet or is damaged. This can be a consideration for metal buildings in areas with harsh weather conditions or high humidity. Additionally, spray foam insulation does not settle over time, meaning that there is no need for periodic maintenance to add more insulation to maintain effectiveness. On the other hand, fiberglass insulation can settle over time, reducing its effectiveness and requiring periodic maintenance to add more insulation. This can add to the long-term costs of maintaining a metal building with fiberglass insulation. When choosing between fiberglass and spray foam insulation for a metal building, the ease of maintenance may be a factor.

Both spray foam insulation and fiberglass insulation have their advantages and disadvantages in metal buildings. While spray foam insulation is generally more effective in terms of air sealing, energy efficiency, and moisture resistance, fiberglass insulation is a more cost-effective and environmentally friendly option. Ultimately, your specific needs and priorities, as well as your budget and building design, will determine whether you choose fiberglass insulation or spray foam insulation.