Rock Wool Batt
Rock wool batt insulation fills framed wall, ceiling, and partition cavities with dense, non-combustible mineral wool — providing higher density and better acoustic performance than glass wool batt in the same cavity depth. Density typically from 30 to 80 kg/m³, thicknesses from 50 mm to 200 mm, fire classification up to Euroclass A1 — confirm exact acoustic and fire data by inquiry. Supplied from our own and partner factories — combined capacity up to 450,000 t/yr, with a one-container MOQ and LCL support.
- Dense mineral fiber provides better low-frequency acoustic absorption in partitions and party walls than lighter glass wool batts.
- Non-combustible material supports fire-rated wall and ceiling assembly documentation without additional fire treatment.
- Dimensional stiffness holds position in tall steel-frame cavities where lightweight batts sag, compress, and leave gaps.
Quick Answer
Key questions buyers ask before sourcing this product.
What is it?
Pre-cut rock wool batt insulation for framed cavities, partitions, ceilings, and acoustic or fire-documented applications.
Best for?
Wall cavities, partitions, ceilings, floors, acoustic cavities, and projects requiring denser mineral wool batt.
Key advantage?
Pre-cut batt format combines cavity fit with rock wool density and fire-review advantages.
Options?
cavity size, thickness, density, acoustic or fire document needs, packing.
Next step?
Share cavity size, thickness, density, quantity, destination, and document needs.
Problems This Product Solves
Common pain points this product is built to address.
Glass wool batt is too light for the acoustic density requirement in party walls.
Partition STC ratings often require higher-density cavity fill than standard glass wool batt provides. Rock wool batt delivers more mass per cavity depth for improved low-frequency sound blocking.
Fire-rated partition assemblies require non-combustible cavity insulation with Euroclass A1.
Fire-rated wall and floor/ceiling assemblies in commercial buildings specify non-combustible insulation by code. Rock wool batt achieves Euroclass A1 without chemical fire-retardant treatment.
High-STC partition walls demand dense cavity fill that lighter batts cannot provide.
Achieving STC 55+ in timber or steel-frame walls requires insulation density that adds acoustic mass to the cavity. Rock wool batt at 40–80 kg/m³ fills this role better than standard 10–16 kg/m³ glass wool.
The cavity application needs both thermal and fire performance in one product without two layers.
Installing separate thermal insulation and fire barrier is costly and complex. Rock wool batt provides thermal insulation and non-combustible fire resistance in a single cavity fill without additional layers.
Engineered for Consistent Performance
Every batch is produced under controlled conditions and verified against international standards, so what you specify is what you receive — project after project.
Product Benefits
What sets this product apart in real projects.
Higher density than glass wool batt
Better acoustic performance and improved sound transmission loss in partition and ceiling assemblies.
Non-combustible mineral fiber
Supports fire-review documentation routes without additional fire treatment in the cavity.
Friction-fit pre-cut format
Same installation speed as glass wool batt — no additional fasteners or adhesives needed.
Available in acoustic and fire-document variants
One product family covers standard cavity fill, acoustic partition, and fire-review assembly needs.
Heavier but denser for improved sound transmission loss
Trades lightweight handling for measurably better acoustic cavity performance.
Compression packaging
Recovers to full thickness after unpacking; reduces freight volume for export.
Best-Fit Applications
Rock wool batt is most commonly used in framed cavities where higher density, acoustic performance, or fire-review documentation is needed beyond what glass wool batt provides.
Fire-rated wall assemblies
Non-combustible mineral fiber supports fire-review documentation routes in rated wall systems.
Acoustic partition walls (STC-tested systems)
Higher density improves sound transmission loss in tested partition assemblies.
Ceiling cavities requiring fire-rated insulation
Provides non-combustible cavity fill for ceiling assemblies referenced in fire documents.
Floor/ceiling assemblies with acoustic requirements
Denser batt improves acoustic separation between floors in multi-story construction.
Commercial interior partitions
Combines thermal and acoustic cavity performance for office, healthcare, and hospitality partition walls.
Why source Rock Wool Batt from SinoInsulation
- Own factory plus a vetted partner-factory network — combined annual capacity up to 450,000 tons.
- MOQ from one 20ft container; LCL and mixed-container (multi-material) orders supported.
- Samples before bulk orders; custom packaging, compression packing, and private-label / OEM labeling.
- ISO 9001 and CE held; ASTM and AS/NZS test reports available on request, matched to the selected product.
- One inquiry, multiple materials: combine rock wool with glass wool, rubber foam, or cellular glass in a single order.
When It's Not the Best Fit
Rock wool batt is not the best first choice for every insulation condition. Review the project before using rock wool batt when:
Selection Guide
Answer these to narrow down the right specification.
What is the application: wall, partition, ceiling, or floor cavity?
Confirms whether batt is the right product form.
What is the cavity size or framing spacing?
Helps confirm width, thickness, and installation fit.
Is the primary need acoustic, fire-document, or standard thermal?
Determines the variant option (unfaced, acoustic, fire-document review, high-density).
What density is required?
Matches product to acoustic or fire-document specifications.
Supply & Purchasing
SinoInsulation supports rock wool batt sourcing for construction, acoustic, and distributor programs.
Need datasheet or project documents?
Send your application and required product details. We can provide datasheet, packing information, and available supporting documents during quote review.
Quality & Market Certs
ISO 9001 quality system and CE marking held; ASTM and AS/NZS test reports available on request, matched to the selected product.
Product Datasheet
Get product data for the selected rock wool batt type and option.
Packing & Labeling Details
Confirm carton, pallet, compression pack, private label, or mixed-SKU packing options.
Frequently Asked Questions
Answers to common questions about this product.
Rock wool batt is denser, providing better low-frequency acoustic absorption and non-combustible documentation for fire-rated assemblies. Glass wool batt is lighter and more economical for moderate requirements.
Rock wool batt can be a component of fire-rated wall and ceiling assemblies, but the fire rating belongs to the tested system — not the batt alone. Confirm complete assembly documents.
Higher density provides better low-frequency absorption. The right density depends on the partition STC target, cavity depth, and wall construction. Confirm from the product datasheet.
Yes — rock wool batt's higher density and friction-fit stiffness help it hold position in tall steel-frame cavities where lightweight batts may sag.
Custom cutting for non-standard framing dimensions may be available. Confirm width, length, thickness, quantity, and tolerance before quoting.
Request a Quote
Tell us the cavity dimensions, acoustic or fire requirements, and project conditions — we will recommend the right batt density, thickness, and facing.