TL;DR
A fiberglass batt is a precut blanket of spun-glass insulation sized to fit between framing members at standard 16- or 24-inch spacing, faced with a kraft or foil vapor retarder or supplied unfaced. Common ratings run R-13 to R-15 in 2x4 walls, R-19 to R-21 in 2x6 walls, and R-30 to R-38 in ceilings.
What it means
A fiberglass batt is a precut blanket of spun-glass insulation sized to fit between framing members at standard 16- or 24-inch spacing, faced with a kraft or foil vapor retarder or supplied unfaced. Common ratings run R-13 to R-15 in 2x4 walls, R-19 to R-21 in 2x6 walls, and R-30 to R-38 in ceilings. Its rated performance assumes a perfect fit: compression, gaps, and sloppy cuts around boxes and wires degrade real-world R-value, which is why batt grading is part of energy-code inspections.
Where it sits in the glossary
Fiberglass batt is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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