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best insulation for shed

Best Insulation for Shed

Choosing the best insulation for a shed can transform it into a cozy workspace, a storage area for sensitive items, or a haven for hobbies. Proper insulation is key to maintaining a comfortable temperature year-round.

We've put together a comprehensive guide to help you select the best insulation for your shed. This article covers various types of insulation, including fiberglass, spray foam, blown-in cellulose, mineral wool, and foil bubble wrap.

Each type has unique benefits and is suited for different needs and situations. From our experience, understanding the options and their advantages will help you make an informed decision for your shed insulation project.

Best Shed Insulation

Choosing the right insulation can make all the difference in maintaining a comfortable temperature inside your shed year-round. Here are the top types of insulation we recommend:

Fiberglass Insulation

Fiberglass insulation is one of the most popular and cost-effective options for sheds, making it a go-to choice for many and perfect for sheds like our Cedarshed Hobbyhouse Kit. Made from fine glass fibers, it is available in batts or rolls, offering flexibility in installation.

This type of insulation is excellent at reducing heat transfer, thanks to its high thermal resistance or R-value, which varies with thickness.

For instance, an inch of fiberglass batt has an R-value of 3.1 to 3.4, while a 12-inch batt can reach up to 40.8. It's also easy to install, fitting snugly between standard stud spacing, making it fantastic for insulating a shed roof.

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Fiberglass is not only effective in temperature control but also provides good soundproofing, which is perfect if you plan to use your shed as a workshop or hobby space.

However, it's important to ensure it stays dry, as moisture can reduce its effectiveness and promote mold growth. Affordable and efficient, fiberglass insulation remains a reliable choice for enhancing your shed's comfort and usability.

Wondering how to insulate a shed door? Fiberglass is perfect for shed doors as well as walls and ceilings.


  • Excellent thermal resistance (R-value)
  • Easy to install
  • Reduces noise

Best For

  • Those looking for a cost-effective and efficient insulation solution
  • Ideal for sheds used as workshops or home offices

Spray Foam Insulation

Spray foam insulation is a versatile and highly effective option for insulating your shed. It's made by mixing polyol resin and isocyanate, which creates a foam that expands upon application. This expansion allows it to fill gaps and cracks seamlessly, ensuring there are no air leaks.

Spray foam provides superior thermal insulation due to its high R-value, with closed-cell spray foam offering an R-value of 6.0 to 6.5 per inch. It's also excellent for moisture control, as it forms a tight seal that prevents water infiltration.

Additionally, spray foam acts as an air barrier, enhancing energy efficiency. However, it's more expensive than other options and requires professional installation for the best results.

Despite the higher initial cost, the long-term benefits of spray foam insulation, such as improved temperature regulation and reduced energy bills, make it a worthwhile investment for many shed owners.

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  • Superior thermal insulation
  • Acts as an air barrier
  • Prevents moisture buildup

Best For

  • Those who need maximum insulation efficiency
  • Sheds in areas with extreme weather conditions

Blown-In Cellulose Insulation

Blown-in cellulose insulation is an eco-friendly choice made from recycled paper products, primarily newspapers. It's treated with non-toxic fire retardants, making it safe and effective.

This type of insulation provides excellent thermal protection due to its high R-value, which ranges from 3.2 to 3.7 per inch for attic applications and up to 3.9 per inch for walls.

The blown-in method ensures that the insulation fills every nook and cranny, eliminating gaps and reducing air leaks. It's dense and settles well, providing consistent insulation over time. Additionally, blown-in cellulose helps in soundproofing, making your shed quieter.

While it performs well in most conditions, it's best used in dry areas as excessive moisture can reduce its effectiveness. Blown-in cellulose is also relatively affordable, with costs averaging around $1 to $1.50 per square foot.

Overall, it's a great option for those looking to insulate their shed in an environmentally friendly and efficient way.


  • High R-value
  • Environmentally friendly
  • Good for filling irregular spaces

Best For

  • Those looking for eco-friendly insulation
  • Sheds with hard-to-reach areas

Mineral Wool Insulation

Mineral wool insulation, also known as rock wool, is crafted from natural volcanic rock and industrial slag, making it a durable and eco-friendly option.

This type of insulation boasts excellent thermal performance with an R-value ranging from 3.1 to 4.0 per inch, depending on the product's density and thickness. It's highly fire-resistant, capable of withstanding temperatures up to 1,800°F, which adds an extra layer of safety to your shed.

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Mineral wool is also renowned for its superior sound insulation, making it an ideal choice if your shed will be used as a music studio or workshop. The dense and fibrous structure not only blocks sound but also helps to dampen vibration.

Additionally, it's resistant to moisture and mold, ensuring long-term performance and air quality. Installation is relatively straightforward, as it comes in batts or rigid boards that fit snugly between standard stud spacing.

While slightly more expensive than fiberglass, its durability, fire resistance, and soundproofing qualities make mineral wool a wise investment for a comfortable and safe shed environment.


  • Non-combustible
  • High thermal and acoustic performance
  • Moisture and mold-resistant

Best For

  • Sheds used as music studios or other noise-sensitive applications
  • Those needing a durable and fire-resistant option

Foil Bubble Wrap

Foil bubble wrap is a lightweight and easy-to-install insulation option that excels at reflecting heat. It's made up of layers of air bubbles sandwiched between reflective aluminum foil, which enhances its ability to reduce heat transfer.

This type of insulation is particularly effective in maintaining temperature stability, as the foil reflects radiant heat while the bubbles provide a thermal break. It's easy to cut and fit into various spaces, making it a versatile choice for DIY projects.

Simply staple or tape it to the shed's framing, and you're good to go. Foil bubble wrap is also moisture-resistant, preventing issues like mold and mildew. It's thin and flexible, so it won't take up much space, which is great for sheds with limited room.

While it might not have the highest R-value compared to other insulation types, its reflective properties make it efficient for reducing both heat gain in the summer and heat loss in the winter.

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It's a cost-effective and practical solution for those looking to improve their shed's insulation without a hefty investment.


  • Reflective barrier reduces heat transfer
  • Easy to install
  • Lightweight and moisture-resistant

Best For

  • Those looking for a quick and simple insulation solution
  • Sheds used for general storage or light-duty applications


Insulating your shed can transform it from a simple storage space into a versatile, comfortable area suitable for various uses. Each type offers unique benefits, from cost-effectiveness and ease of installation to superior thermal resistance and soundproofing qualities.

Whether you need maximum efficiency, eco-friendly materials, or a quick and simple solution, there's an insulation type that fits your needs.

By choosing the right insulation, you can maintain a stable temperature in your shed year-round, protect sensitive items, and create a more enjoyable environment.

For top-notch custom shed kits that meet all your needs, visit Homestead Supplier and find the perfect fit for your project today!

If you want to learn more, why not check out these articles below:

Previous article Insulating a Shed Roof
Next article How to Frame a Floor for a Shed

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