Stone wool manufacturing
A1 Fire Rated — Euroclass A1 Non-Combustible

A1 fire-rated stone wool insulation, made for cladding

Thermawool delivers premium A1 non-combustible stone wool insulation solutions engineered for modern cladding applications — outstanding fire, thermal and acoustic performance.

Precision cut
A1 Fire Rated — Euroclass A1 Non-Combustible

Stone wool precision-cut for modern construction

State-of-the-art manufacturing ensures every Thermawool product meets the most demanding technical specifications — delivering consistent performance on every project.

Delivery
A1 Fire Rated — Euroclass A1 Non-Combustible

Where the power of natural stone meets comfort

From the factory to your project site, Thermawool delivers premium stone wool insulation to projects across the United Kingdom — supporting every stage of your build.

A1 Fire Rated — Euroclass A1 Non-Combustible
A1 Fire Rated
Euroclass A1 · Non-combustible
Superior Thermal Performance
λ 0.035 W/mK
Acoustic Comfort
Excellent sound absorption
Recyclable
Naturally sustainable
What we offer

Stone Wool Solutions for Every Application

From technical specifications to project delivery, Thermawool supports every stage of your build with premium A1-rated stone wool products and expert guidance.

The Thermawool Range

Multiple Products.
One uncompromising standard.

Every Thermawool board is Euroclass A1 non-combustible — precision-manufactured stone wool engineered for the most demanding cladding and floor specifications. Browse the full range below.

RAINCLAD
A1 Fire Rated — Euroclass A1 Non-Combustible

RAINCLAD®

External Wall · Rainscreen Cladding

A high-performance, non-combustible stone wool insulation board for ventilated rainscreen façade and external cladding systems. Manufactured from natural volcanic basalt, it delivers reliable thermal performance (λ 0.035 W/mK), Euroclass A1 fire resistance and effective acoustic absorption on buildings of any height — including over 18 m.

60 kg/m³
Nominal density
λ 0.035
W/mK conductivity
50–225 mm
Thickness range
Need technical support for your project?Our team of technical experts is ready to help you specify the right solution.
Contact our team