HouseChalk
Mineral wool insulation
Mineral wool insulation is made from rock or slag fibers. It is denser and more fire-resistant than fiberglass.
Why it matters
Mineral wool handles fire better and can reduce sound transmission. It holds its shape well and does not absorb water easily.
Where people get this wrong
Mineral wool costs more than standard fiberglass batts. It is not always necessary, but it can be a good choice for fire separation walls and soundproofing.
Real-world example
Insulation is installed in a wall between the garage and house. Mineral wool helps with both fire resistance and blocking the sound of a running car.
Where this hits your build
This affects comfort, energy costs, and indoor air quality. It gets locked behind drywall, so decisions here need to be right before finishing starts.
Most people do not just struggle with terms. They struggle with the decisions tied to them.
See how HouseChalk helps with the decisions behind terms like this