TL;DR
A mineral wool batt is a semi-rigid insulation panel spun from molten rock or steel slag, offering about R-4.2 per inch along with exceptional fire resistance — it withstands temperatures above 1,800 degrees F without burning. Denser and easier to cut crisply than fiberglass, it friction-fits walls and excels at sound damping between rooms and floors.
What it means
A mineral wool batt is a semi-rigid insulation panel spun from molten rock or steel slag, offering about R-4.2 per inch along with exceptional fire resistance — it withstands temperatures above 1,800 degrees F without burning. Denser and easier to cut crisply than fiberglass, it friction-fits walls and excels at sound damping between rooms and floors. It costs more per cavity, so bids often place it selectively in fire-rated assemblies, mechanical rooms, and bedroom partitions.
Where it sits in the glossary
Mineral wool 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
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