No one can objectively say the best insulation type for your DIY Metal Building Project; however, one can wisely review the pros and cons of different insulations before making a choice. I want to begin by discussing your do-it-yourself metal building insulation project.  I’m sure you are aware now that insulation helps keep your building cozy in the winter months and warm in the summer months. In addition, it reduces noise pollution in your building or home.

The problem is that there are so many types of metal building insulation to consider, and each has unique qualities. Therefore, the average layman can easily get confused. This article intends to assist you in making an informed decision by touching on popular insulation options, cost-effectiveness, ease of erection, and overall thermal efficiency. 

• Fiberglass Insulation: If you have read my previous blogs, fiberglass insulation is the most popular choice due to its price savings, availability, and quick delivery. Keep in mind that fiberglass insulation is relatively easy to install, but it requires careful handling. So, get out the gloves, wear a mask, and wear gloves.
• Mineral Wool Insulation: This insulation is used in the fiberglass family. It is denser and acknowledged for its high fire resistance and soundproofing capabilities. However, since it is thicker, it is heavier and more costly than traditional fiberglass.
• Spray Foam Insulation: For most, the cost is the first consideration. With Spray Foam, you get the highest R-value (a measure of insulation’s thermal resistance) per inch. It also creates a tight air barrier to seal around cracks and gaps. However, it is more expensive than other insulation types because it requires professional installation.
• Rigid Board Insulation:  This type of insulation is easy to install and may be an excellent choice for insulating a roof and wall. 
• Reflective or Radiant Barrier Insulation: For those in warm climates, I would look at getting Reflective insulation or at least supplementing your insulation. Its purpose is to reflect radiant heat away from your structure. Good reflective insulation should reflect 97% of radiant heat transfer. 

Pros and Cons of Insulation Types

Now let’s go a little deeper and talk about the pros and cons of each insulation type:

Fiberglass Insulation:

Pros:

Fiberglass insulation is popular because it has been around for over 150 years and, for its cost, has good thermal efficiency and sound-dampening ability. It is not only a good metal building insulation, but it is also a good pole barn insulation source. In addition to these facts, it is cost-effective and easy to install. Lastly, one can easily order the insulation with a fire retard facing for little additional cost, making the insulation nonflammable.

Cons:

One of the drawbacks of fiberglass insulation is that its tiny particles can irritate a person’s skin and eyes during installation, so wearing protective gear is necessary. There are also some environmental concerns to consider when using fiberglass insulation. Fiberglass is made from recycled glass, which is not biodegradable. In addition, fiberglass can get wet in time, and issues such as mold, mildew, and reduced R-value can occur.

Mineral Wool Insulation

Pros:

This insulation is made from natural stone or industrial waste. It has excellent thermal efficiency and sound-dampening qualities. Since it is fire-resistant, it meets or exceeds most fire safety standards. Finally, it is very durable and maintains its performance.

Cons:
The drawbacks of this type of insulation are that it is costly and requires protective gear because tiny fibers will irritate the eyes, the sky, and the respiratory system.

Spray foam insulation

Pros:

This may be the best type of insulation regarding thermal efficiency and sealing properties because it expands upon application to fill gaps and prevent air leaks. It also does not degrade over time.

Cons:

Yet, it is more expensive than other insulation types, primarily because it requires professional installation. During the installation process, this insulation can release harmful chemicals.

Rigid board insulation

Pros

This insulation is made from materials like polystyrene, polyurethane, or fiberglass. It has excellent thermal resistance because it has a higher R-value per inch than most insulation types. It is considered one of the most versatile insulations. It is moisture-resistant and durable.

Cons:

This insulation is also more expensive than most types. Because of its design, it requires careful installation to avoid gaps. Cutting and fitting rigid boards can also be time-consuming.

Reflective or Radiant Barrier Insulation

Pros:

This insulation is often made from materials with highly reflective surfaces, usually aluminum foil. This foil is connected to plastic film; the higher-quality reflective insulation types have the foil attached to polyethylene foam. Reflective insulation reflects radiant heat away from a structure. It is ideal for hot climates, reflecting up to 97% of radiant heat transfer.

Cons:

A drawback is that this insulation requires an air cap and is primarily utilized to keep buildings cool in hot climates. It is not known for effectively protecting structures in colder climates. Moreover, if dust accumulates on the reflective surface, its performance can deteriorate over time.

Like anything, no insulation is perfect for every climate, condition, or circumstance.  Consider your budget, building size, design, and climate when selecting your insulation.