Overview
Rock wool — also sold as mineral wool or stone wool — is insulation spun from molten volcanic rock into a dense mat of fibres. Air trapped between the fibres slows heat flow and absorbs sound, and because the fibre itself is stone, the product does not burn. That combination of thermal, acoustic and fire performance in one material is why rock wool is the default insulation for industrial plants, HVAC ductwork, partitions, roofs and fire-stopping.
Wedge Industries Limited supplies rock wool in densities from 30 to 200 kg/m³, as rolls, slabs, pipe sections and loose fill, plain or faced with aluminium foil, bitumen or glass cloth. Tell us the application, thickness and quantity and we quote within 24 hours.
Mineral wool insulation specifications
Typical values for the Wedge rock wool range. A technical data sheet for the exact density and form is issued with every quotation.
| Property | Rock wool / mineral wool |
|---|---|
| Material | Rock (stone) mineral wool |
| Maximum service temperature | Up to 700 °C |
| Density range | 30 – 200 kg/m³ |
| Density options | 30 / 50 / 80 / 100 / 120 / 150 / 200 kg/m³ |
| Thermal conductivity | 0.033 – 0.045 W/m·K at ambient |
| Fire classification | Non-combustible — Class A1, zero flame spread |
| Sound absorption | NRC 0.85 – 1.0 |
| Moisture | Hydrophobic (water-repellent) treatment available |
| Forms | Roll · slab · pipe section · loose granulated |
| Facings | Plain · aluminium foil · bitumen coated · glass cloth |
| Supply | India, UK, Europe, Middle East, USA and Asia |
Which density do I need?
Density sets stiffness, acoustic performance and how much load the board can take. As a guide:
| Density | Typical form | Typical use |
|---|---|---|
| 30 – 50 kg/m³ | Rolls, light batts | Ceilings, roof voids, light partitions, HVAC duct wrap |
| 80 – 100 kg/m³ | Slabs | Wall cavities, drywall partitions, acoustic panels, cold rooms |
| 120 – 150 kg/m³ | Rigid slabs, pipe sections | Process pipework, boilers, tanks, industrial equipment |
| 200 kg/m³ | High-density boards | Roof boards under load, fire-stopping, high-temperature equipment |
Not sure? Use the insulation thickness calculator or send us the operating temperature and we will specify density and thickness.
Rock wool insulation price in India
Rock wool is priced per square metre by density and thickness. Indicative project rates, ex-works, excluding 18 % GST and freight:
| Product | Indicative price (₹) | Indicative price ($) |
|---|---|---|
| Rock wool slab 50 mm, 40 kg/m³ | ₹150 – 200 per m² | $1.6 – 2.1 per m² |
| Rock wool slab 100 mm, 60 kg/m³ | ₹320 – 400 per m² | $3.3 – 4.2 per m² |
| Higher densities, pipe sections, faced products | On request | On request |
USD at ₹96/$. Prices move with order size, facing and delivery location — get a firm price in 24 hours.
Applications
- Industrial buildings, warehouses and pre-engineered buildings — roof and wall insulation
- HVAC ductwork and plant rooms
- Power plants, refineries and process industries — pipes, boilers, tanks and equipment
- Drywall and partition walls — thermal and acoustic
- Fire-stopping, fire doors and passive fire protection — see fire protection and fire door components
- Marine, offshore and cold chain projects
Rock wool vs glass wool
Both are mineral wool. Rock wool is made from stone, is heavier for the same thickness and handles higher temperatures — up to 700 °C for the Wedge range — so it is the choice for industrial equipment, fire-stopping and acoustic work. Glass wool is lighter and cheaper per m² and suits ceilings and light building insulation. For ceilings and partitions on a budget, ask us for glass wool alongside the rock wool quote.
Why buy from Wedge Industries Limited
- One supplier for the full range — rolls, slabs, pipe sections, loose fill and faced products.
- Specified for you — we match density and thickness to your temperature and application.
- Documentation — TDS and test certificates with every quotation.
- Export ready — 45+ countries with regular Gulf and South East Asia shipments.
Frequently asked questions
What is rock wool insulation?
Rock wool, also called mineral wool or stone wool, is insulation made by spinning molten volcanic rock into fibres. It insulates against heat and sound and is non-combustible (Class A1). The Wedge range covers 30–200 kg/m3 with thermal conductivity of 0.033–0.045 W/m·K and service up to 700 C.
What is the price of rock wool insulation in India?
Indicative project rates are INR 150–200 per m2 (USD 1.6–2.1) for a 50 mm, 40 kg/m3 slab and INR 320–400 per m2 (USD 3.3–4.2) for a 100 mm, 60 kg/m3 slab, ex-works and excluding 18% GST. Higher densities, pipe sections and faced products are quoted on request.
Is mineral wool the same as rock wool?
Mineral wool is the family name. Rock wool (stone wool) and glass wool are both mineral wools. Rock wool is made from stone and handles higher temperatures, which makes it the usual choice for industrial and fire-protection work.
Is rock wool fireproof?
Rock wool is non-combustible, Class A1, with zero flame spread. It does not burn and is used in fire-stopping, fire doors and fire-rated partitions. Fire resistance of a wall or door depends on the tested system, not the insulation alone.
Which density of rock wool should I use?
30–50 kg/m3 for ceilings and duct wrap, 80–100 kg/m3 for walls and acoustic partitions, 120–150 kg/m3 for pipes and industrial equipment, and 200 kg/m3 for loaded roof boards and fire-stopping. Send your application and we will specify it.
Is rock wool good for sound insulation?
Yes. Rock wool slabs have a noise reduction coefficient (NRC) of 0.85–1.0, so they are widely used in acoustic partitions, studios, plant rooms and machine enclosures.
Related products
- High density rock wool board
- Rock wool batts
- Aluminium foil faced rock wool
- Bitumen coated rock wool
- Loose granulated rock wool
- Mineral wool water tank insulation cover
- Rockwool insulation in Delhi NCR
- High-temperature insulation
- All insulation products
Request a quotation for rock wool insulation
Send the density, thickness, form (roll, slab or pipe section), facing and quantity in m². Wedge Industries Limited returns a technical data sheet and a firm price in ₹ INR and $ USD within 24 hours.
