RockWool
Mineral insulation derived from the fusion of volcanic rocks. Offers a unique combination of thermal insulation, excellent acoustic absorption and passive fire protection (Class A1).
Multi-function insulation principle. The fibrous mass blocks heat and dissipates acoustic energy through friction. Melting point above 1150 degrees C ensures passive fire compartmentation.
From the melting of basaltic rock a material is reborn that protects living spaces. Rock wool is not merely a thermal insulator, but a mineral barrier against fire and noise, a pillar of contemporary building safety.
Production emulates volcanic activity: natural rocks such as basalt, dolomite and diabase are melted in furnaces at over 1500 degrees C. The molten rock is spun to obtain very fine fibres, then moulded into rolls or panels. Being open-structured (mu=1), rock wool does not retain vapour, allowing walls to breathe and avoiding interstitial condensation.
Unlike synthetic insulators (EPS, XPS, PU), rock wool is incombustible (Euroclass A1). It does not contribute to fire, does not drip and emits no toxic fumes, withstanding temperatures above 1000 degrees C. Acoustically, its fibrous nature acts as a sponge for sound waves, dissipating them within the mineral weave.
Standards
European and international references applicable.
Physical properties
Usage environment
Rock wool is mandatory on facades above certain heights where combustibility of external insulation is restricted. On breathable historic masonry, its mu=1 value prevents interstitial condensation.
Documented applications
TAV. DETICS cladding system
Rigid high-density panels for ETICS cladding systems with fire protection requirements.
Roofs and flat roofs
High-load thermal insulation, ideal for timber or metal roofing systems.
Drywall partitions
Filling plasterboard stud cavities for superior acoustic and sound insulation performance.
Pipework and HVAC ducts
Insulation of pipework and air ducts subject to fire risk, maintaining structural integrity above 1000 degrees C.
Fire Behaviour (Euroclasse and Thermal Threshold)
TAV. EWhile synthetic insulants excel in thinness (lower lambda), rock wool is the only material that guarantees total facade safety against vertical fire spread. Mandatory above certain building heights (RTV Facciate regulation).
Used in these processes
TAV. PUsed in these systems
TAV. SReference regulations
9 norms- D.Lgs. 192/2005Implementation of Directive 2002/91/EC on the energy performance of buildingsIn force
- D.M. 26/06/2015Minimum energy-performance requirements for buildings (the 'minimum requirements decree')In force
- D.P.C.M. 05/12/1997Determination of the Passive Acoustic Requirements of BuildingsIn force
- Dir. (UE) 2024/1275Energy Performance of Buildings - recast (EPBD)In force
- Reg. (UE) 2024/3110New Construction Products Regulation (CPR)In force
- UNI 11367UNI 11367: the acoustic class of dwellingsIn force
- UNI EN 13501-1:2019Fire classification of construction products and building elements - Part 1: Reaction to fireIn force
- UNI EN 13501-2:2016Fire classification of construction products and building elements - Part 2: Classification using data from fire resistance tests, excluding ventilation servicesIn force
- UNI EN 15804UNI EN 15804: the rules for Environmental Product Declarations (EPD)In force
Informational links to the regulatory framework. Always verify the current text on the official source.
Operational documents from this sheet
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