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Class A1 Noncombustible · Eurofins Fire Rated

Rockwool Wall Panels

The wall panel you specify when the core itself must not burn. A high density mineral wool core, with its fibres turned upright for strength, bonded between two steel skins on a continuous line. Class A1 noncombustible, strong across tall facades, and a serious acoustic barrier.
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How It Is Built
◆ Class A1 Noncombustible
◆ Eurofins Fire Rated
◆ Rotated Fibre Lamellas
◆ EI30 to EI240
◆ Acoustic Rated
◆ Continuous Line Made
◆ Dimensionally Stable
◆ Pan India Delivery
◆ Class A1 Noncombustible
◆ Eurofins Fire Rated
◆ Rotated Fibre Lamellas
◆ EI30 to EI240
◆ Acoustic Rated
◆ Continuous Line Made
◆ Dimensionally Stable
◆ Pan India Delivery
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Class A1 Noncombustible

A mineral core that does not burn, does not drip, and gives off no toxic fumes, the highest fire classification there is.
◇

Rotated Fibre Strength

Fibres stood upright between the skins for compressive strength, shear stiffness, and wind suction resistance on a tall facade.
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Serious Acoustic Barrier

A dense fibrous core that absorbs sound, cutting airborne noise with Rw ratings up to thirty five decibels.

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Holds Its Shape

Not batch produced. The same density and performance on every panel off the press.

When Rockwool

When Fire Is the Deciding Factor

PIR and PUF insulate better and weigh less, and for most buildings they are the right core. But when the wall itself has to resist fire, nothing matches a mineral one. Rockwool carries a Class A1 noncombustible rating, holds its shape past one thousand degrees, and gives off no toxic smoke or molten drips while it does it. It also dampens sound far better than foam. So the honest rule is simple. Specify Rockwool where fire separation or acoustics govern the wall, and PIR or PUF where thermal performance and weight matter more.

See Fire Insulation ↗

Property
Rockwool
PIR / PUF
Reaction to Fire
Class A1 noncombustible
Class B, standard
Fire Resistance
EI30 to EI240
Limited
Core Melting Point
Over 1000°C
Softens and drips
Acoustic (Rw)
Up to 35 dB
Lower
Thermal Conductivity
0.038 to 0.044 W/mK
0.022 to 0.024 W/mK
Core Density
100 to 120 kg/m³
40 to 48 kg/m³
Best Default For
Fire and acoustic
Thermal and cold storage
How It Is Built

Engineered on a Continuous Line

A continuous line Rockwool wall panel is not a slab of mineral wool glued to steel. The way the core is cut, turned, and sealed is what gives the finished panel its strength and its weather tightness across a long wall.
01

Rotated Fibre Lamellas

The mineral wool is cut into strips and turned ninety degrees so the fibres stand upright between the two steel skins. That vertical grain is what gives the panel its compressive strength, its shear stiffness, and its resistance to wind suction across a tall facade.

02

Tight Interlocking Joints

Continuous roll forming presses a precise interlocking edge profile into every panel, so they lock together into a continuous, airtight, weather resistant wall with no visible gaps across long spans.

03

Single Length Panels

An integrated flying saw cuts the running panel to the exact length you need, up to twelve to fifteen metres and beyond, so a wall can go up in one vertical span with no horizontal joints to seal or fail.

04

Optional PU or PIR Edge

On premium panels a polyurethane or PIR strip is injected along the joint edges, protecting the mineral core from moisture and closing the thermal path at every joint.

A1
Reaction to Fire
EI30 to EI240
Fire Resistance
Over 1000°C
Panel Construction
Up to 35 dB
Sound Reduction Rw

PANEL JOINERY

Available Joint Systems

Roof Joint

Single Tongue And Groove

Double Tongue And Groove

Hidden Tongue And Groove

M - Section

Surface Materials

Facing Options

PPGI

Pre-Painted Galvanised

0.30 to 0.80mm. SMP, RMP, PVDF coatings.

PPGL

Pre-Painted Galvalume

Superior corrosion resistance. Coastal environments.

AL

Aluminium

0.40 to 0.71mm. Lightweight, non-magnetic.

PPAL

Pre-Painted Aluminium

Custom RAL colours. Clean room and architectural.

SS

Stainless Steel

SS304, SS316. GMP pharmaceutical. 0.50 to 1.20mm.

Interactive Tool

Configure Your Panel

Select your application below.
The recommended specification updates automatically.

Select Your Application
01
Fire Compartment
Non-combustible fire barriers
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02
High-Safety Partition
Pharma and food grade fire walls
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03
Maximum Fire Rating
Highest Class A1 specification
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04
Industrial Fire Wall
Flammable materials, chemical zones
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05
Acoustic Fire Wall
Sound + fire in one panel
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Recommended Specification
Fire Compartment Wall
Recommended
Thickness
80 to 120mm
Facing
PPGI / PPGL
Joint
Tongue & Groove
Temperature
All Ranges
Fire Rating
Class A1 · 2-HR
U-Value
≤ 0.48 W/m²K
◆Non-combustible fire barrier walls separating different fire compartments in a building
◆Eurofins-certified 2-hour fire resistance on 80mm and 100mm Rockwool panels
◆Zero toxic smoke production allows safe evacuation and firefighter entry
◆Meets insurance mandates for non-combustible wall construction
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Before You Order

Specification Checklist

Most specification mistakes happen early. Wrong thickness for the temperature delta. Wrong fire class for the occupancy type. Wrong coating grade for the site conditions. Use this checklist before you freeze your bill of quantities.

What to Lock Before You Order

  • Rockwool has a higher thermal conductivity than PIR (0.038 vs 0.022 W/m·K). You will need thicker panels to achieve the same U-value. Factor this into your wall thickness and floor area calculations.
  • Rockwool panels are heavier than foam-core alternatives. Verify your structural steel is designed for the higher cladding weight before ordering.
  • Get your fire engineer and insurer to confirm Class A1 is the required specification. If Class B (PIR) would satisfy the requirement, you may save cost without compromising compliance.
  • Rockwool absorbs moisture. It is not ideal for cold storage or high-humidity environments where condensation is likely. Specify PIR for those applications.
  • Request the Eurofins fire test certificate with your quotation. Confirm the fire rating applies to the specific thickness and facing combination you are ordering.

After Installation

  • Walk all joint lines and flashings after every monsoon season. Sealant failure is the most common leak path.
  • Clean panel surfaces with mild detergent only. Abrasive cleaners cut through the coating and shorten its life.
  • Re-check fastener torque every two years on exposed roofing panels.

Where It Goes

Built for
Fire and Sound

Discuss Your Project ↗

Fire Separation Walls

Internal partitions that divide warehouses, logistics centres, and chemical plants into separate fire compartments and lower the insurance risk.

High Acoustic Buildings

Power plants, compressor enclosures, manufacturing halls, and auditoriums that need serious noise control inside or out.

Commercial Facades

Shopping centres, sports arenas, transport hubs, and schools where the fire code demands A1 noncombustible cladding.

Clean Rooms & High Care

Pharmaceutical, electronics, and food spaces that need a noncombustible wall with a smooth, easy to clean surface.

Questions

Before You Specify

What specifiers, fire officers, and contractors ask us most about Rockwool panels.
Class A1 is the top European reaction to fire classification. The material makes no contribution to a fire at all. Rockwool does not ignite, does not spread flame, gives off no significant smoke, and does not drip molten material, which is why fire codes call for it on so many facades and compartment walls.
Depending on thickness and build up, our Rockwool wall panels provide fire containment from EI30 up to EI240, which is thirty minutes to four hours of holding a fire on one side without it passing through. We confirm the exact rating for your specification.
The dense mineral core absorbs airborne sound, with Rw sound reduction ratings up to around thirty five decibels, and higher again with a perforated inner liner. That is a real step up on foam cored panels, which is why it suits auditoriums, plant rooms, and buildings near airports.
Yes. The mineral core is much denser, so the panels weigh more and the supporting structure is sized for it. That weight is the trade you make for noncombustibility and acoustics, and it is well worth it where fire or sound governs the wall.

Choose Rockwool when the wall itself must not burn, when a fire compartment or boundary wall is required, or when acoustics matter. Choose PIR or PUF when thermal performance, thinner walls, and lighter weight matter more and fire is not the governing concern.

OUR PRODUCTS

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Better thermal and lighter, where fire is not the governing concern.
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Fire Insulation

How Rockwool protects a building and buys time in a fire.
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Industrial Sheds

The buildings our Rockwool roofs most often cover.

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Talk to Our Team

Specifying a Fire Wall?

Tell us the fire rating, the acoustic target, and the wall area, and our team will come back with a Rockwool specification, a price, and a timeline within five working days.
  • Factory: Derabassi, Mohali, Punjab
  • Office: #669, Sector 11-B, Chandigarh
  • Phone: +91 98883 00888
  • Email: info@aceprefab.com