Pros and Cons of Spray Foam Insulation in Metal Buildings

Spray foam insulation is becoming increasingly popular for metal buildings, and for good reason. It offers a number of unique advantages over other types of insulation, but it’s important to weigh the pros and cons before making a decision.

In this article, we’ll take a comprehensive look at the pros and cons of spray foam insulation in metal buildings, so you can make an informed choice about what’s best for your project.

Table of Contents

What is Spray Foam Insulation?

Spray foam insulation is a popular choice for metal buildings because it offers a number of unique advantages. It’s applied in liquid form and expands into a foam when sprayed. Thus it fills the space it’s sprayed into, creating a seamless, airtight seal that provides superior thermal insulation and moisture resistance.

There are two main types of spray foam insulation:

  • Open-Cell Spray Foam: This type of spray foam is less dense and expands to fill the space it’s sprayed into. It has a spongy texture and is effective at reducing airborne sound transmission and is often used for interior walls and ceilings.
  • Closed-Cell Spray Foam: Closed-cell spray foam is denser and provides a higher R-value, which means it insulates better. It forms a rigid, impermeable barrier and is often used in exterior applications, such as insulating metal roofs or walls. Closed-cell spray foam is known for its exceptional insulating capabilities and moisture resistance.

Next, let’s take a closer look at the pros of using spray foam insulation in metal buildings.

The Pros of Spray Foam Insulation in Metal Buildings

Excellent Insulation Properties

One of the primary reasons people choose spray foam insulation is its outstanding insulation properties. With a high R-value, it effectively seals any gaps or cracks in your metal building, preventing heat loss in the winter and heat gain in the summer.

Spray foam effectively seals any gaps or cracks in your metal building, preventing heat loss during the winter and heat gain in the summer. This results in lower energy consumption and utility bills.

Air and Moisture Barrier

Spray foam insulation acts as an excellent air and moisture barrier. It tightly seals all openings, preventing the infiltration of outside air and moisture into your building. This not only helps maintain a comfortable indoor environment but also protects your metal structure from potential damage caused by moisture infiltration.


Spray foam insulation is incredibly versatile. It can be used in various parts of your metal building, including walls, ceilings, and even hard-to-reach areas. This versatility ensures comprehensive insulation coverage, leaving no room for drafts or energy leaks.


When properly installed, spray foam insulation can last for decades without losing its effectiveness. Unlike traditional insulation materials that may sag or deteriorate over time, spray foam remains intact, providing consistent insulation throughout its lifespan.

Energy Efficiency

Spray foam insulation’s superior insulation properties contribute to enhanced energy efficiency in your metal building. The reduced energy consumption not only benefits your wallet but also helps reduce your carbon footprint, making it an environmentally friendly choice.

The Cons of Spray Foam Insulation in Metal Buildings

Initial Cost

While spray foam insulation offers long-term savings on energy bills, the initial cost can be higher compared to traditional insulation materials. However, many homeowners find that the energy savings and increased comfort justify the upfront investment.

Professional Installation Required

Unlike some DIY-friendly insulation options, spray foam insulation requires professional installation. The application process involves mixing and spraying the foam, ensuring it expands correctly. This expertise is crucial to achieving optimal insulation performance.

Potential Off-Gassing

During the curing process, spray foam insulation may release certain chemicals known as volatile organic compounds (VOCs). These VOCs can have an unpleasant odor and may irritate some people. However, most of the VOCs dissipate quickly after installation.

During the curing process, spray foam insulation may release certain chemicals known as volatile organic compounds (VOCs). While most of these VOCs dissipate quickly, some individuals may be sensitive to the odor and should consider alternative insulation options.

Difficult to Remove

Once installed, removing spray foam insulation can be challenging and may require the expertise of a professional. This can be a drawback if you plan to make significant changes or renovations to your metal building in the future.

Susceptible to Pest Infestations

In some cases, pests like rodents may find spray foam insulation appealing as a nesting material. Proper pest control measures should be in place to prevent infestations.


Overall, spray foam insulation is a highly effective and versatile insulation solution for metal buildings and other structures. It offers a number of unique advantages, including excellent insulation, air and moisture barrier, versatility, durability, and energy efficiency. However, it’s important to weigh the pros and cons before making a decision, as spray foam insulation can be more expensive upfront than traditional insulation materials and requires professional installation.

If you’re looking for a premium insulation solution for your metal building or other structure, Ener-Spray Canada can help you choose the right insulation products and ensure proper installation. As the leader in fireproofing, fire stopping, and other premier insulation technology, Ener-Spray Canada has a wide range of spray foam insulation products and services to meet the unique needs of your project, so you can enjoy the benefits of spray foam insulation for many years to come.

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