Is Closed Cell Spray Foam the Best Insulation for Metal Buildings?

Older metal buildings often have one thing in common. They were never built for comfort. They were built for storage, utility, or basic protection from the elements. Over time, many of those structures get repurposed into workshops, hobby spaces, or equipment storage. That is exactly what happened for homeowner Philip Annunziato in Bradenton. Our team recently helped convert a 20-year-old metal storage shed into a functional workshop by applying closed cell spray foam insulation throughout the interior. The goal was simple. Make the building stronger. Keep it cooler during Florida heat. Turn it into a space that could actually be used year-round.

Why Closed Cell Spray Foam Was the Right Fit

Metal sheds and older outbuildings can heat up quickly in Florida. Sun exposure pushes heat through the metal panels, and without insulation, interior temperatures can rise fast. Closed cell spray foam works especially well in older metal buildings because it does more than insulate. It also creates an air seal and adds rigidity to the structure. That added strength can be especially valuable in older buildings where durability matters. According to the U.S. Department of Energy, spray foam insulation helps reduce unwanted air leakage, which is one of the biggest causes of energy loss in buildings.For this project, our team sprayed closed cell foam directly onto the walls and roofline, creating a continuous barrier that helps stabilize indoor temperatures even during Florida summer heat.

A Repeat Customer With Real Experience

This was not Philip’s first insulation project with Koala Insulation of West Florida. In fact, this was the third time he called the company. He had previously used closed cell insulation in a newer 20×35 metal building shop. He also had blow-in insulation installed over garage spaces used for collector car storage.
For us, repeat customers usually say more than any sales pitch ever could. Philip shared that each project was handled quickly, priced fairly, and completed on schedule. He specifically noted that if our company had not delivered strong results, he would not have returned a second or third time. When someone comes back a third time, it usually means the earlier work held up exactly the way they hoped.

Why Older Metal Buildings Benefit From Spray Foam

Older metal sheds usually struggle with heat moving through thin walls, condensation during temperature swings, and air leaking around seams and framing. That is usually the point where spray foam starts making a noticeable difference because several issues improve at once. Because the foam adheres directly to the metal and framing, it fills irregular gaps and creates a more complete thermal barrier than traditional insulation materials. For a workshop, that means better comfort for tools, materials, and time spent inside the space. It also helps reduce strain if the owner later adds cooling equipment. Homeowners exploring similar upgrades can learn more about closed cell spray foam insulation here.

Structural Benefits Matter Too

One of the lesser-known advantages of closed cell spray foam is structural reinforcement.
Once cured, the foam hardens and bonds to the interior surfaces. In older metal buildings, that added stiffness can help improve overall stability. That does not replace structural repairs where needed, but it does contribute to a stronger interior shell. For a 20-year-old metal shed being converted into a working space, that extra support adds long-term value.

Turning Storage Into Useful Space

A building does not have to stay limited to its original purpose. With the right insulation approach, older sheds and shops can become practical spaces for projects, storage, and daily use. That is exactly what this Bradenton project accomplished. Now the space should stay noticeably more usable, especially once summer temperatures really settle in. If you have an older metal building, workshop, garage, or shed that needs insulation, Koala Insulation of West Florida can help.

Call us or visit our website for a free estimate today. About Koala Insulation of West Florida

Koala Insulation provides insulation solutions for homeowners and property owners across Bradenton, Sarasota, and surrounding areas, including spray foam insulation, attic insulation, air sealing, and insulation removal designed to improve comfort and energy efficiency.

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