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Thermal insulation- Eco Star Foam

9 Best Roof Insulation Types

Are you tired of your attic being too hot in summer and too cold in winter? Are you worried about your energy bills skyrocketing? Well, you might find the solution right above your head—in your roof insulation!

Your roof insulation plays a crucial role in keeping your home cool during summer, warm during winter, and reducing your energy bills. However, with so many different types of roof insulation available, it can be challenging to choose the right one. But don’t worry, we’re here to help!

Our comprehensive guide will explore the 9 best roof insulation types, their unique advantages and disadvantages, and help you choose the perfect insulation for your needs and climate. Let’s begin creating a more comfortable and energy-efficient home!

1. Spray Foam Insulation

Professional Spray Foam ContractorSpray foam is a type of insulation that is applied as a liquid and is an excellent material for sealing gaps and holes as it can expand. It is made of two liquid components, an isocyanate, and a polyol, that react when mixed to form a hard foam.

Once applied, it can help regulate the temperature inside a building, keeping it warm during the winter and cool during the summer. Additionally, spray foam can prevent air contamination by creating a tight seal that prevents outside elements from entering.

It can be used in any area of the house, including attics, walls, crawl spaces, foundations, and irregularly shaped corners, and is more durable than other insulation materials as it does not sag easily.

Here are some of the benefits of spray foam insulation:

  • High R-value: Spray foam insulation has a high R-value, which is a measure of its ability to resist heat flow. This means that it can help to keep your home cooler in the summer and warmer in the winter.
  • Moisture barrier: Closed-cell spray foam insulation can act as a vapor barrier, which can help to prevent moisture problems in your home.
  • Soundproofing: Spray foam insulation can also help to reduce noise transmission in your home.

2. Rigid Insulation Boards

Rigid insulation boards are a popular type of insulation material used in construction projects for both residential and commercial buildings. They provide a compromise between thermal resistance (R-value) and ease of installation, and they are available in a variety of forms.

  • Rigid and Strong: These boards are firm and can withstand some structural loads. This allows them to be used in a variety of applications, including walls, floors, and certain types of roofs.
  • Lightweight: These boards are lightweight and can be easily handled, which means that DIY installation is possible.
  • Good Insulators: They can significantly improve a building’s energy efficiency by reducing heat transfer.
  • Moisture Resistance: Rigid insulation boards are effective in retaining the temperature within the roof, making it an ideal solution for keeping a place warm.

3. Batt Insulation

Batt insulation is commonly made of mineral wool, fiberglass, or cotton and has the advantage of being easy to install and fitting perfectly between joists and studs. Additionally, this type of insulation is affordable and works well on a budget. Despite being less expensive than other materials for roof insulation, it still provides efficient insulation.

The most common types of batt insulation are:

  • Fiberglass: The most commonly used and affordable option. It offers good thermal resistance but can be irritating to the skin during installation.
  • Mineral Wool: Similar in performance to fiberglass but generally more expensive. It’s fire-resistant and less irritating to the skin.
  • Natural Fiber Batts: Made from materials like sheep’s wool or cellulose, these are eco-friendly options with good sound absorption properties. However, they might be more susceptible to moisture issues and require special handling.

4. Fiberglass

Fiberglass insulation is a popular choice for many. It’s made from fine strands of glass fibers and is often found within walls, ceilings, and attics.

Made from extremely fine glass fibers bonded with resin, fiberglass creates a web-like structure that traps air. This trapped air acts as a barrier, slowing down heat transfer and keeping your home comfortable year-round.

This material has several benefits:

  • It is cost-effective. Compared to other types, fiberglass offers good value for money. It insulates well without breaking the bank.
  • It’s versatile. You can use it in various parts of your home, from attics to basements.
  • Fiberglass is fire-resistant. This feature adds an extra layer of safety to your home.
  • It has a high R-value per inch. This means it provides excellent thermal resistance.

5. Cellulose Loose Fill Insulation

Spraying cellulose insulation in the attic of a house. Insulation of the attic or floor in the house.Cellulose loose-fill insulation is a versatile and environmentally friendly insulation alternative that is becoming increasingly popular among homes. It is made from recycled paper, making it a more environmentally friendly alternative to typical fiberglass insulation.


  • Eco-Friendly: Made from recyclable resources, cellulose insulation has a long-term advantage.
  • High Thermal Performance: Cellulose offers a good R-value, helping to regulate indoor temperature and improve energy efficiency.
  • Excellent Filling Power: The loose-fill nature allows it to conform to even the most awkward nooks and crannies in walls, attics, and floors, minimizing air gaps and heat transfer.
  • Sound Dampening: Similar to fiberglass, the cellulose fibers help absorb sound, reducing noise transmission between rooms.
  • Fire Resistant: With added fire retardants, cellulose insulation offers good fire resistance.

6. Perlite

Perlite insulation is well-known for its lightweight nature, which makes it easy to handle and install. Moreover, it doesn’t add much weight to the structure of a roof, which is beneficial for the overall stability of a building.

This type of insulation is thermally resistant, meaning it can keep the place cooler in summer and warmer in winter. Additionally, it can help save energy by reducing heat transfer from the roof.

The source of this material is volcanic glass, which makes it non-flammable. The process of heating it until it pops makes it lightweight and gives it insulating characteristics.

Since it is an inorganic material, it is not attractive to rodents and other pests, as it is not suitable for habitat or a food source for them.

7. Structural Insulated Panels

Structural insulated panels (SIPs) are gaining popularity for their efficiency and sustainability. These panels consist of an insulating foam core between two structural facings, typically made of oriented strand board (OSB). This unique construction offers several benefits.

  • First, SIPs provide exceptional thermal insulation. The continuous core of extruded polystyrene or similar materials minimizes heat loss. Homes built with these panels often see reduced heating and cooling costs.
  • Next, the installation process is streamlined. Although it requires professional installation, the large size of the panels means that walls can go up quickly. This can significantly shorten building times compared to traditional methods.
  • Finally, SIPs contribute to stronger structural integrity. The bond between the foam core and the OSB creates a rigid panel capable of resisting strong forces. This makes buildings more durable over time.

8. Blanket Insulation

Blanket insulation comes in the form of batts and rolls and can cover large areas. It can be easily installed and is perfect for attics.

One major advantage is its effectiveness in maintaining temperature. It works well both for keeping heat out during the summer and retaining warmth during winter. This dual capability makes blanket insulation a versatile option for many climates.

Another benefit is its ease of installation. Homeowners can often install it themselves without needing professional help.

Lastly, when installing a new roof, adding blanket insulation underneath can significantly improve energy efficiency. This upgrade not only enhances comfort but also reduces energy bills over time.

9. Mineral Wool Insulation

Mineral wool insulation, often referred to as rock wool insulation, is a popular choice for homeowners and builders seeking a balance between performance, safety, and ease of use.

Mineral wool insulation offers several benefits:

  • It is fire-resistant and can withstand high temperatures. This makes it a safer option for homes and buildings, reducing the risk of fire spread.
  • It also has excellent soundproofing qualities. If you live in a noisy area or value quiet in your home, mineral wool can block out external noise effectively.
  • Another advantage is its ability to absorb moisture without losing insulating properties. This characteristic helps prevent mold and mildew growth inside walls.

To ensure the best outcome, consult with us at Ecostar Foam. We can assess individual requirements and recommend the most suitable insulation type.

Star Spray Foam can provide detailed insights into installation processes, cost-effectiveness, and long-term benefits of each option. Taking action towards better roof insulation not only contributes to a more sustainable future but also enhances indoor living conditions for years to come.