Fiberglass Batt Pros and Cons

Both fiberglass batting and loose-fill blown-in fiberglass insulation (often referred to as “cellulose”) are budget options that can be installed by homeowners. Compared to spray foam insulation, these products are less expensive and easier to install. This article will examine the pros and cons of each to help you decide which option is best for your home.

1. Lifespan Is Shorter Than Expected

Often marketed as lasting a century or more, crawlspace encapsulation may last fifteen to twenty years in real-world applications before it begins to lose its performance. This is due to a variety of factors, including air infiltration, moisture content, and installation errors such as gaps. Additionally, sagging can occur over time and can lead to a reduction in performance.

2. Not Recommended for Basements

Even when paired with a separate vapor barrier, fiberglass batting cannot be used in below-grade applications like basements. Although some fiberglass batting options have kraft facings that act as a vapor retarder, below-grade installations require a vapor barrier to manage moisture and prevent mold growth.

3. Blown-In Insulation Has a Better Energy Efficiency Than Fiberglass Batts

Loose-fill blown-in insulation is more efficient than fiberglass batts because it can fit into crevices and unique spaces. It is a great option for retrofit projects, as well as new construction. It is typically installed by professionals using a blower machine that can be rented at some hardware stores. Because this equipment is necessary, the upfront cost for blown-in insulation is greater than batts.

Bryars Spray Foam
Elrod, Alabama (Service area type of client)
(205) 576-5009