Common Types of Roof Insulation

House Under Construction — Minneapolis, MN — D.S. Bahr Construction, Inc.

Roof insulation is crucial in maintaining a comfortable temperature inside your home throughout the year. It accomplishes this by keeping your home cool during the summer and warm during the winter, reducing the workload on your heaters and air conditioning units. To gain insight into commonly used types of roof insulation for your home, continue reading.

Polyester Insulation 

Polyester insulation is a synthetic product created from recycled polyethylene terephthalate (PET) plastic, typically sourced from items like drink bottles. It is designed for insulation in various applications, including roofs. Different forms are available, such as blankets, rolls, and batts. 

Polyester insulation is safe to handle. It is non-allergenic, meaning it doesn’t trigger allergies, and non-irritant so that it won’t cause skin or respiratory irritation. Additionally, it is non-toxic, which means it does not release harmful chemicals into the air.

Polyester roof insulation is lightweight and easy to handle, making installation a hassle-free process. Its flexibility allows it to conform to various roof shapes and sizes, ensuring a seamless fit. The material is also resistant to moisture absorption, preventing the growth of mold and mildew and maintaining a healthier indoor environment.

Wood Fiber

Wood fiber emerges from the amalgamation of raw materials like wood, cane, or vegetable fibers alongside fillers or binders. This material can undergo asphalt impregnation or coating to enhance its resistance to moisture. Noteworthy advantages of wood fiber insulation include its reasonable strength and the convenience it offers for cutting and shaping. 

Wood fiber roof insulation boasts impressive moisture management capabilities. It can effectively regulate humidity levels by absorbing and releasing moisture, preventing the buildup of condensation and reducing the risk of mold or mildew formation. This attribute ensures a drier and more breathable roof structure, promoting the longevity of the building.

Additionally, wood fiber insulation excels in sound insulation, effectively reducing unwanted noise transmission from the outside environment. This feature creates a quieter and more peaceful indoor atmosphere, allowing occupants to enjoy a tranquil living or working space.

Fiberglass Batts

Fiberglass batts serve as a popular insulation choice for rafters due to their affordability and their availability in various shapes and R-Values. They come in pre-cut sizes that fit standard roof joist or rafter spacing, making the installation process quick and straightforward. The batts can be easily trimmed to fit irregular spaces or around obstacles, ensuring a snug and seamless fit. This simplicity and flexibility of installation saves time and effort.

Glass Wool

Glass wool is an inorganic insulation material that manufacturers produce from recycled glass. They melt the glass at high temperatures and then draw thin glass threads from the molten glass during the cooling process. Afterward, they add a few additives to create glass wool.

Glass wool has excellent insulating properties due to its light structure, which allows it to retain a significant amount of air. 


Loose-fill or blown-in insulation is a suitable choice for filling large spaces like attics or crawl spaces, and it can be made from fiberglass, cellulose, or recycled materials. A roofing expert can blow it into the space using a flexible tube, enabling insulation of hard-to-reach areas. With loose-fill insulation, you can exercise considerable control over the total amount of insulation, which helps in achieving the desired level for your specific climate. 

Another significant advantage is that loose-fill insulation is highly durable. Once properly installed, it remains stable and effective for an extended period without settling or deteriorating over time. This longevity contributes to its cost-effectiveness, as it reduces the need for frequent insulation replacement or maintenance.

D.S. Bahr Construction, Inc. emphasizes the importance of high-quality service and a personalized approach. Our expertise lies in roofing, siding, deck construction, and exterior remodeling, and we look forward to forward to extending our expertise to your property in the Minneapolis, MN, area. Contact us today to book an appointment.

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