Light and extremely flexible mineral insulation from the fusion of silica sand and recycled glass (up to 80%). In drywall systems, it acts as an acoustic spring, dissipating sound energy and blocking heat transfer.
Drywall partition. The low dynamic stiffness of glass wool allows it to function as a perfect acoustic damper inside the cavity, breaking the sound bridge between the two plasterboard skins.
Light, elastic and intrinsically safe. Glass wool is the leading insulator of dry-construction systems: it fills empty cavities, transforming thin walls into formidable barriers against thermal loss and noise.
The production cycle is an example of circular economy. Silica sand and recycled glass cullet (up to 80%) are melted at 1400 degrees C and transformed into microfibres. The most recent technologies have replaced phenolic glues with formaldehyde-free bio-based binders, making modern glass wool safe for indoor air quality.
In a plasterboard partition, sound passes through the first rigid board (the mass) and makes the air in the cavity vibrate. Filling this void with glass wool solves the problem: thanks to its low dynamic stiffness and high open porosity, the material acts as a spring that dissipates acoustic energy as heat (viscous friction).
European and international references applicable.
Glass wool is the preferred insulation for lightweight drywall systems where weight is critical. It is not recommended for external cladding (ETICS) due to lower density and mechanical strength: rock wool panels are required instead.
Primary use: filling drywall stud cavities for acoustic isolation between rooms.
PRC.30 · Open the processUnrolled batts laid flat on the last slab to block winter heat loss.
PRC.31 · Open the processInsulation press-fitted between structural posts in lightweight timber frame wall systems.
PRC.07 · Open the processGlass-veil-faced panels in suspended ceilings for in-cavity or exposed sound absorption.
PRC.26 · Open the processIn a Massa-Molla-Massa drywall system, glass wool acts as the acoustic spring. Its low dynamic stiffness (s' < 15 MN/m3) breaks the rigid sound bridge between the two plasterboard skins, enabling sound insulation values (Rw) above 50 dB in a single partition.
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