Construction
Vermiculite for Construction
Fire-Resistant
Lightweight Structural Fill
Thermal Insulation
Why the Construction Industry Chooses Vermiculite
Vermiculite is used in construction as a lightweight, non-combustible aggregate that improves thermal and acoustic performance across a range of building systems.
From fireproofing plasters to lightweight concrete and masonry fill, vermiculite reduces structural load while delivering reliable insulation and fire resistance. Its stability and performance make it a trusted material in both commercial and residential construction.
Vermiculite is used where insulation, fire resistance, and weight reduction are critical to system performance.
Learn more about vermiculite safety and sourcing: Is Vermiculite Safe? →
Not sure which mineral is right for your application? Perlite vs Vermiculite →
Common Applications
Available Formats
- Bulk
- Super sacks
- Bagged (multiple sizes available)
Sizes and Gradations
Micron (Ultra-Fine)
Typical size: <150 microns
Used in specialty coatings, fireproofing sprays, and fine-grade plaster mixes requiring uniform dispersion.
Super Fine
Typical size: 150–500 microns
Ideal for fireproofing plasters, acoustic coatings, and lightweight finishing mixes.
Fine
Typical size: ~0.5–1.5 mm
Used in lightweight plasters, gypsum boards, and ceiling tile formulations.
Medium
Typical size: ~1.5–3.0 mm
Versatile grade for lightweight concrete, screeds, and masonry fill applications.
Coarse
Typical size: ~3–6 mm
Used for loose-fill insulation, roof decking, and bulk masonry block fill.
