Benefits
- Cost-effective insulation material
- Fits common framing layouts
- Practical for interior and exterior accessible cavities
- Suitable for new construction and select retrofits
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Fiberglass Batts
A practical, pre-cut fiberglass insulation option for accessible interior and exterior framing cavities in new construction, remodels, and targeted upgrades.
What it is
Understanding Fiberglass Batts
Fiberglass batt insulation is a pre-cut material designed to fit between common wall studs, floor joists, and ceiling framing. It is available in various widths and thicknesses for different cavity layouts, making it a versatile option for projects with open, accessible framing.
How It Works
Fiberglass fibers slow heat transfer through the cavity. The material must be fitted continuously and correctly around framing, wiring, and other obstructions to avoid gaps, compression, and voids. Careful cutting and placement help maintain coverage in both interior partitions and exterior wall assemblies.
Common applications
- Interior framed walls
- Exterior framed walls
- Floors over unconditioned areas
- Ceilings and accessible attics
- New construction
- Remodeling
- Targeted retrofit work
Energy-efficiency considerations
Properly fitted batts can help slow heat transfer. Actual performance is affected by complete coverage, fitting, compression, gaps, and the other components of the building envelope.
Installation considerations
Batts should be sized to the cavity and installed without unnecessary compression or voids. Insulation and air sealing are separate considerations, so penetrations and gaps should be evaluated independently.
Important considerations
Plan Around the Full Building Assembly
Batt insulation performs best when it is fully fitted around obstacles and framing.
Gaps, compression, and incomplete coverage can affect performance.
Air-sealing details are separate from insulation and should be addressed as part of the overall plan.
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Questions, Answered Straight
They are pre-cut fiberglass insulation pieces designed to fit standard framed cavities.