About the Product
These R8 fiberglass insulation batts are sized for standard 24" on-center wall framing, with a 23" width that fits snugly between studs and a 2.5" thickness suited to shallower cavities and lighter-duty applications. They're a practical choice for interior partitions, basement stud walls, and supplemental insulation layers where a lower R-value meets code or budget requirements — not for applications needing fire resistance, acoustic isolation, or exterior continuous insulation, where rockwool is the better fit. Each bundle contains 29 pre-cut batts, making them easy to handle, transport, and install with less cutting than roll insulation — simply place each batt between framing members, trim around electrical boxes or obstructions, and avoid compressing the material to preserve its R-value. Fiberglass batts slow heat transfer, support energy efficiency, and help reduce sound transfer between rooms, while their flexible structure conforms around wiring, plumbing, and minor framing irregularities. They're a budget-friendly option for contractors, renovations, and DIY projects where a full R12 assembly isn't required.
Fiberglass Batts FAQ
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Sized for standard 24" on-center wall framing. At 2.5" thick and 23" wide, they suit shallower cavities and lighter-duty applications than the standard 3.5" 2×4 batt.
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Each bundle contains 29 pre-cut batts measuring 2.5" × 23" × 48", covering 232 ft² per bundle.
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Place each batt between framing members, trim around electrical boxes or obstructions as needed, and avoid compressing the material — compression reduces its R-value. No special tools required.
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Cost and simplicity. Fiberglass batts run a fraction of the price of rockwool per square foot, so for interior partitions and basement stud walls where fire rating, acoustic performance, or moisture exposure aren't major concerns, fiberglass gets you a code-compliant R-value without paying for performance you don't need. It's also lighter and faster to handle for straightforward stud-bay installs. If your project involves party walls, mechanical rooms, or exterior continuous insulation, rockwool is worth the upgrade — but for typical interior framing on a budget, fiberglass is the practical choice.
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It depends on the assembly and application — R8 is often used for interior partitions or as a supplemental layer rather than a full exterior wall assembly. Check your project requirements against the Ontario Building Code's SB-12 insulation values, or give us a call and we'll help confirm.
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$0.34/ft², tax included — the price you see is the price you pay. Orders over $1,000 get 5% off, and delivery is available Ontario-wide (contact us for a quote).