When it comes to insulation, the amount of coverage you get per bag can vary significantly depending on the type of insulation and the brand. Generally, a bag of insulation will cover a minimum of 40 to 50 square feet with different R-values. For instance, an R13 roll of single-sided fiberglass measures 40 m2. Different brands offer different square footage by size.
For example, an Owens Corning R 19 23 Kraft bag measures 118.83 square feet, while the same size of the R 19 23 Kraft in Johns Manville is 138 square feet and a roll of R 19 23 kraft is only 40 square feet. If you're looking to add insulation to an existing wall with minimal damage to the existing gypsum board, you'll need to apply a loose insulator such as fiberglass or cellulose, or an expandable foam insulator. When using insulating strips, it's important to check the space between the uprights in the area you are going to insulate. While coated insulating strips are designed so that the paper face can be stapled to the uprights, appropriately sized insulating strips, both coated and uncoated, can be held in place with just a friction fit. A bundle of insulating material is tied with wire so that you can move it from one side to the other and easily bring it to your insulation project. Additionally, if you're looking for an easy way to install insulation without having to cut and fit pieces together, you may want to consider using pre-cut insulation boards.
These boards come in various sizes and thicknesses and are designed for easy installation. No matter what type of insulation you choose, it's important to understand how much coverage each bag provides. This will help you determine how many bags you need for your project and ensure that you get the best coverage possible. With this knowledge in hand, you'll be able to make an informed decision about which type of insulation is best for your needs.