Mineral Wool Insulation

Mineral Wool Insulation

Mineral wool (also known as rock wool or stone wool) is a premium insulation material made from spun molten rock or industrial slag. It differs from fiberglass in that it is denser, heavier, and offers higher heat resistance and sound deadening properties.

Structo Insulation installs mineral wool for projects where fire protection, sound control, and moisture resistance are priorities.

Why Choose Mineral Wool Insulation

Mineral wool is engineered for performance in demanding environments. Its fibrous structure is similar to fiberglass but is far more robust, allowing it to withstand higher temperatures and provide a stronger barrier against noise.

It is often specified for partition walls, floor/ceiling assemblies, and fire rated assemblies where code compliance and safety are critical.

Key Benefits of Mineral Wool

Exceptional fire resistance
Mineral wool is non combustible and can withstand temperatures exceeding 2,000°F. It acts as a fire barrier that can slow the spread of flames between rooms or floors.

Superior acoustic control
The high density of mineral wool makes it ideal for reducing airborne sound transmission, creating quieter rooms and more private living spaces.

Moisture repellency
Mineral wool is hydrophobic (water repelling) and does not absorb moisture. Even if it gets wet, it retains its structure and insulating value once dried.

Dimensional stability
Unlike some other insulations, mineral wool does not shrink, settle, or lose shape over time. It stays firmly in place within the wall cavity.

Common Applications

• Interior walls: Between bedrooms, bathrooms, and media rooms for soundproofing.
• Between floors: To reduce impact noise and airborne sound from traveling between levels.
• Fire rated assemblies: In garages, mechanical rooms, and kitchen walls where fire safety is a concern.
• Exterior walls: For enhanced thermal and acoustic performance in heavy traffic areas.

Installation and Performance

Mineral wool batts are stiffer than fiberglass batts and are cut to friction fit between studs. This creates a tight seal without the need for stapling or support wires.

Structo Insulation installers ensure that mineral wool is cut precisely to fit around electrical outlets, pipes, and wiring, maintaining the integrity of the fire and sound barrier.

Request a Mineral Wool Evaluation

Mineral wool offers a higher level of protection and comfort than standard insulation. If sound control or fire safety are key goals for your project, mineral wool is an option worth considering.

Request a mineral wool evaluation to review your specific needs and receive a recommendation tailored to your home or building.