GLASS WOOL INSULATION: EVERYTHING YOU NEED TO KNOW
Glass wool, also known as fiberglass insulation, has emerged as a versatile,
efficient, bio-soluble and environmentally friendly insulation material.
It was first introduced by Saint-Gobain (ISOVER) in 1937 which further
expanded across the world. Today our presence is in over 27 countries being
a world leader in mineral wool insulation.
Lightweight, durable, and easy to install, glass wool offers a comprehensive
solution for thermal, acoustic, and fire insulation needs. Here’s everything
you need to know about this remarkable material.
WHAT IS GLASS WOOL?
Glass wool is made by spinning or drawing molten glass into fine fibers, creating
a texture similar to wool. These fibers are bound together using a binder to
form rolls, slabs, or loose-fill materials. Glass wool belongs to the broader
category of "mineral wools," alongside stone wool, and is widely regarded for
its excellent insulating properties.
KEY BENEFITS OF GLASS WOOL INSULATION?
- Thermal Comfort for Buildings
A study states that for every 1oC rise in temperature above 27oC, the
productivity of a typical human reduces by 3%.
With a typical thermal conductivity between 0.028 and 0.045 W/m∙K, it is
highly effective in reducing energy consumption. Lower the K-value, the
better the thermal performance. It is generally applied in the roofs, wall
to create a temperature gradient. This helps to reduce the overall heat load
coming through the building envelope.
- Energy Efficiency
- For Building: Typically about 50-60% of a
building’s energy consumption is through HVAC system only. The high
thermal performance of glass wool based duct wrap
solution/Climaver duct system ensures that the air conditioning
(HVAC) system is energy efficient.
- For Industrial Process: Processes such as cryogenic
application requires efficient thermal insulation at sub zero
temperatures. Glass wool meets the criteria and ensures the system
gets superior energy efficiency.
- Acoustic Performance
Glass wool’s porous and elastic structure absorbs sound waves, providing
superior acoustic insulation for various environments. This makes it ideal
for applications requiring noise control, such as offices, studios, and HVAC
systems.
Our range of glass wool insulation achieves up to 1.0 NRC
(Noise Reduction Coefficient).
- Fire Resistance
Glass wool insulation is
non-combustible in nature (complying to the latest National Building Code),
making it a fire safe product. As the product is inorganic (low calorific
value), it does not propagate fire or generate toxic smoke in the event of
fire in building.
- Sustainability
Glass wool is mainly made from recycled
glass (up to 80%) reducing the environmental footprint.
- Ease of Installation
Available in compressed rolls and
sheets, glass wool is lightweight and simple to handle, store, and install.
This minimizes labor time and costs.
- Health and Safety
Our glass wool being EUCEB certified,
it is Biosoluble, which implies it being completely safe for humans. WHO in
their IARC volume 81 as well has declared glass wool to be safe (Group 3),
grouping it in the same category as that of tea and coffee.
APPLICATIONS OF GLASS WOOL
Glass wool is incredibly versatile, finding applications across residential,
commercial, and industrial sectors:
- Building Insulation: Used in façade, wall, roofs and
underdeck to enhance energy efficiency and thermal comfort.
- HVAC: Common in HVAC systems for multiple applications such
as ducting system, piping, and acoustics to reduce energy loss, control
condensation and reduce noise.
- Acoustic Insulation: Ideal for soundproofing in theaters,
studios, and residential buildings such as home theatres; also suitable for
partition system in offices and institutions.
- Fireproofing: Applied in structures requiring enhanced fire
safety standards for personnel safety and evacuation.
HOW GLASS WOOL WORKS?
The insulating properties of glass wool rely on its laminar structure of
alternating gas pockets and solid fibers. These pockets trap air, a poor
conductor of heat, thereby minimizing heat transfer. The absence of convection
within these pockets further enhances its insulation efficiency.
For example, applying 100mm of glass wool insulation with a thermal conductivity
of 0.032 W/m.K to a roof reduces temperature below up to 8oC.
ENVIRONMENTAL BENEFITS
Glass wool supports sustainability goals through:
- High recycled content (up to 80%) sourced from glass cullet.
- Compressed packaging leads to less carbon emission per Kg of material during
transportation.
- Reduced energy consumption during production and use.
- Zero ozone-depleting potential, ensuring a lower carbon footprint.
Additionally, our range of glass wool insulation is Greenpro, GRIHA and SGBC
approved.
CONCLUSION
Glass wool is a powerhouse insulation material that checks all the boxes for
modern building requirements—efficiency, sustainability, fire and health safety,
and performance. Whether you’re designing energy-efficient homes or large-scale
industrial facilities, glass wool offers unmatched versatility and benefits,
making it the go-to choice for insulation needs.
By integrating innovative manufacturing techniques and leveraging recycled
materials, glass wool manufacturers like Saint-Gobain are ensuring this product
remains a leader in the insulation market while supporting global sustainability
efforts.
For more insights into energy-efficient solutions, stay tuned to our blog!