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Batt vs Roll Insulation: A Buyer's Guide

Lowe's Editorial Team

By Lowe's Editorial Team
Published August 8, 2024

Selecting the best insulation for your home is crucial for proper heat flow and lower electricity bills. This buying guide will help you discover the benefits and drawbacks of batt vs. roll insulation. Based on this, it will help you choose the right insulation for your home.

Difference Between Roll and Batt Insulation

Batt and roll insulation both come under blanket insulation. They are called blanket insulation because of their puffy look. They also cover the insulation area in a blanket-like manner. The difference between the two lies in their installation, benefits and drawbacks. This guide will help you understand the difference to make an informed purchase.

Caution

After making the purchase, when you start the installation process, remember to refer to the manufacturer’s safety instructions. Wear your safety glasses and dust mask for optimum protection.

What is Batt Insulation?

Batt insulation comprises pre-cut sections of blanket insulation. It can be made of fiberglass, mineral wool or natural and plastic fibers. It comes readily cut by the manufacturer. This ensures it fits properly between studs and tresses. Batt helps limit the airflow and traps heat. It is available with or without aluminum foil or paper facing. Depending on the application you need, you can choose from: 

Good to Know

R-value measures the thickness and density of the insulation material and demonstrates how well it can resist heat flow in and out of the space. Batts have an R-value range of R-2.9 to R-3.8. Batts that are dense can resist heat better and have an R-value as high as R-4.3 per inch.

Benefits of Batt Insulation

The benefits of batt insulation are: 

  • Ease of installation: They come in pre-cut individual pieces from the manufacturer so you can install them easily. 
  • Cost-efficiency: Batt insulation is typically more affordable when compared to its counterparts. With appropriate tools, you can install it by yourself. This further cuts down on labor costs. Additionally, over time, it helps you save on your energy bills, making it a smart choice overall.

Drawbacks of Batt Insulation

The downsides of batt insulation are: 

  • Might leave gaps: Even though batt insulation can be cut properly to fit specific areas, it may not fit well in hard-to-access or oddly shaped areas. 
  • Requires a separate water barrier: This helps prevent water from penetrating through the insulation and walls. 
  • Fibers can affect the eyes, lungs and skin: Batts may exude airborne dust containing fiberglass. This may cause irritation to the eyes, lungs and skin. 
  • May compress over time: Certain batt insulation materials like cotton can compress over time due to moisture exposure.

Good to Know

Flattening batt insulation can reduce its R-value.

What is Roll Insulation?

Roll insulation is designed to ensure easy installation and manipulation. You can easily install it by cutting or shaping the roll to fit any area. It comes in materials like mineral wool, natural fibers, fiberglass or plastic fibers. It is usually rolled out between the wall and framing of the ceiling. Rolls come in lengths, ranging from 20 to 40 feet long. Their applications include:

Benefits of Roll Insulation

The perks of roll insulation are: 

  • Best for large spaces: Roll insulation comes in continuous lengths, making it easier to roll out on the surface of installation. 
  • Quick installation: It is easy to measure, cut and install in the desired place.
  • Easy to cut: The roll insulation is easy to cut as the material is thin.

Good to Know

Rolls also have an R-value range of R-2.9 to R-3.8 per inch of thickness. Denser rolls can have a higher R-value of up to R-4.3 per inch.

Drawbacks of Roll Insulation

The downsides of rolls are: 

  • Easy-to-tear: Roll insulation is made of thin material which makes it easier to tear. 
  • It is difficult to move: Since they are large rolls, they may be difficult to carry and move around. 
  • Can cause itching: Fiberglass rolls may irritate the skin during installation.

Batt vs. Roll Insulation: A Straightforward Comparison

Now that you know the difference between roll and batt insulation, the comparison below will help you make the right choice.

An image showing the difference between batt insulation and roll insulation.

Choosing the Right Insulation

Both batt and roll insulations are cost-effective choices. Batt insulation is available in options like rock batt insulation, mineral wool batt insulation or fiberglass batt insulation. Similarly, roll insulation is also available as mineral wool insulation, plastic fiber roll insulation or fiberglass roll insulation. Remember to measure the insulation area to make the right choice. If you prioritize easy installation while also ensuring affordability, installing roll insulation would be a smart choice. However, if you want a thicker alternative and wish to fit the insulation in hard-to-access areas, batt insulation would be your best bet.

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