Rockwool Thermal & Acoustic Insulation

Fire-resistant insulation for sound and temperature management.

When a project demands insulation that performs on multiple fronts simultaneously – blocking heat transfer, absorbing sound, and holding up in a fire – Rockwool Thermal and Acoustic Insulation from Astal Roofing Industries delivers across all three without compromise. Manufactured from stone wool fibres derived from volcanic basalt rock, our rockwool insulation offers a combination of thermal resistance, acoustic absorption, and non-combustibility that no single alternative insulation material can match – making it the specification of choice for industrial buildings, cold storage facilities, and HVAC systems across India where performance, safety, and longevity are all critical procurement criteria.

What Is Rockwool Insulation?

Rockwool – also known as stone wool insulation or mineral wool insulation – is manufactured by melting volcanic basalt rock and spinning it into fine fibres, which are then bonded into slabs, rolls, or batts of varying density and thickness. The resulting material is dimensionally stable, inherently non-combustible, highly resistant to moisture, and effective across both thermal and acoustic performance parameters – properties that derive directly from the inorganic mineral nature of the material, not from chemical additives or coatings that can degrade over time.

For procurement teams and specifying engineers evaluating insulation options for industrial buildings, cold storage units, and HVAC systems, rockwool’s combination of fire safety, thermal performance, and acoustic attenuation in a single, durable material represents a significant specification advantage over insulation types that address only one of these performance requirements.

Available Thickness Range - 4mm to 20mm

30–50mm

Acoustic wall linings, HVAC duct insulation & light thermal applications

75–100mm

Standard industrial roof & wall insulation, cold room panels & sandwich panel cores

150–250mm

High-performance thermal barriers for cold storage, freezer rooms & energy-rated buildings

Key Performance Areas

Thermal Insulation

High thermal resistance (R-value) across all thickness options – reducing heat gain in industrial buildings during summer and heat loss in cold storage and temperature-controlled facilities year-round.

Acoustic Insulation

The open fibrous structure of stone wool absorbs airborne sound waves and reduces structure-borne noise transmission – delivering significant noise reduction in industrial environments, plant rooms, and machinery enclosures.

Fire Safety

Rockwool is inherently non-combustible – it does not burn, does not contribute to flame spread, and does not produce toxic smoke in a fire event, making it the only insulation choice for fire-rated construction and high fire-risk industrial environments.

Moisture Resistance

Stone wool fibres are hydrophobic – they repel water rather than absorbing it, maintaining full thermal and acoustic performance even in humid, condensation-prone industrial environments without degradation or mould growth.

Key Features & Technical Specifications

Stone Wool
Fibre Construction

Manufactured from volcanic basalt rock melted and spun into inorganic mineral fibres – a material that is inherently stable, dimensionally consistent, and free from the organic compounds that cause degradation in polymer-based insulation materials over time, ensuring rockwool delivers its rated thermal and acoustic performance across the full design life of the building or system it insulates.

Superior Acoustic
Insulation

The dense, open fibrous structure of stone wool is one of the most effective sound absorbers available – absorbing airborne noise from industrial machinery, process equipment, and external sources, and attenuating structure-borne sound transmission through walls, roofs, and floors in multi-occupancy or noise-sensitive industrial and commercial buildings.

Non-Combustible - Melting
Point Exceeding 1,000°C

Rockwool does not ignite, does not sustain combustion, and does not produce toxic smoke or flaming droplets in a fire event – with a melting point exceeding 1,000°C, it provides passive fire protection to the structure it insulates, making it the mandatory specification for fire-rated wall, roof, and floor assemblies in industrial and commercial construction.

High Thermal Resistance
Across All Thicknesses

Available from 30mm to 250mm, our rockwool insulation provides a scalable thermal resistance range that covers everything from light acoustic wall linings and HVAC duct wraps at the thinner end, to high-performance cold storage panels, freezer room insulation, and energy-rated building envelopes requiring maximum R-value at the thicker end of the specification range.

Hydrophobic &
Dimensionally Stable

Stone wool fibres repel moisture rather than absorbing it – maintaining structural integrity, thermal performance, and acoustic effectiveness in the high-humidity, condensation-prone environments typical of industrial buildings, cold storage facilities, and HVAC plant rooms across India’s climate zones, without the compression, sagging, or performance loss that affects moisture-absorbing insulation materials over time.

Available in Custom
Sizes & Densities

Supplied in slab, roll, and batt formats across a range of densities – from low-density rolls for light acoustic applications to high-density slabs for structural sandwich panels and high-load-bearing insulation applications – ensuring the correct product form and density is specified for every thermal, acoustic, and structural requirement in the project.

Applications

Industrial Buildings & Manufacturing Plants

Roof and wall insulation in factories and industrial sheds – reducing heat gain in summer, improving worker comfort, and meeting energy performance targets for large-footprint industrial facilities across India.

Cold Storage & Refrigerated Facilities

High-thickness rockwool insulation in cold room panels, freezer room walls, and refrigerated warehouse envelopes – providing the sustained thermal resistance and moisture management required to maintain stable internal temperatures in energy-intensive cold chain logistics and food processing facilities.

HVAC Systems

Duct insulation, air handling unit linings, and plant room acoustic treatment – reducing thermal loss from supply ductwork, attenuating mechanical plant noise, and meeting noise compliance requirements for HVAC systems in commercial and institutional buildings.

Why Source Rockwool from Astal Roofing?

At Astal Roofing Industries, Rockwool Thermal and Acoustic Insulation is supplied alongside our full range of roofing sheets, purlins, and building envelope products – enabling procurement teams to source a fully coordinated, thermally and acoustically optimised building system from a single supplier. Our team provides thickness selection guidance, thermal performance calculations, and acoustic specification support to ensure the correct rockwool product is specified for your building type, climate zone, and performance target.

We supply rockwool insulation in bulk quantities to EPC contractors, cold storage developers, HVAC contractors, and project procurement teams across India – with consistent product quality, competitive pricing, and coordinated delivery alongside roofing and cladding orders for simplified project procurement and site logistics.

We supply bubble foil insulation in bulk roll quantities to EPC contractors, roofing sub-contractors, and project procurement teams across India – with competitive pricing, consistent product quality, and coordinated delivery alongside roofing sheet and accessory orders for simplified project logistics.