What Is Glass Wool | Glass Wool Properties | Glasswool | Glass Wool Insulation | Glass Wool Thermal Conductivity | Glass Wool Advantages and Disadvantages

9 min readNov 7, 2022

What Is Glass Wool?

Glass Wool is an insulating material manufactured from glass fiber known as borosilicate glass arranged using a binder into a texture similar to that of wool. It constitutes silica sand, recycled glass, and fixing agents which form a perfect combination in order to provide good insulation and coating for the houses.

Glass Wool

The key property of glass wool is to save energy by efficiently reducing the rate of transfer of heat through the components of the house. When used in a refrigerator it resistant to corrosion by keeping the exposed surface of a refrigerated system above the dew point. (Grasscrete)

Glass Wool Properties

The following is properties of glass wool material,

- Glasswool is one of the best alternatives to the insulation provided to the house.

- It is an excellent sound insulator material capable of absorbing incident sound hence used as an acoustic barrier to reduce sound transmission.

- It can also be a good thermal insulator.

- Glass Wool is an environmentally friendly material, as it is completely natural mineral wool, manufactured by the fusion of recycled glass and sand or cullet.

- Being made from recycled material it is an inexpensive and cost-effective product.

- It has good tensile strength, in the sense, it will be a durable material.

- The most astonishing characteristic of glasswool is that it can resist fire up to 300o C.

Glass Wool Production Process

Glasswool is mainly made from sand and recycled glass. Its extraordinary thermal properties contribute to saving energy and combat climate change.

Glass Wool Manufacturing Process

The Manufacturing process of Glasswool is given below,

1. Batch

The main constitutes of Glasswool are sand, soda ash, limestone, and recycled glass; which are stored in silos. The process begins with weighing, mixing, and pouring the constituents into a furnace. (Lintel)

2. Melting

The mixed constituents are then melted in an electric gas furnace at a temperature exceeding 1,400°C.

3. Fiberizing

The liquid glass obtained from the furnace is later passed via a feeder to a fiberizing machine, where it is propelled through tiny holes with the help of a centrifugal spinner — creating the fibers. These fibers are sprayed with a binder and shaped into a blanket.

4. Forming

The blanket of fibers is passed through a curing oven, which is compressed to desired thickness.

5. Cutting

After obtaining the final thickness the blanket is then cut to the required width. Off-cuts obtained in cutting are recycled eventually to avoid wastage.

6. Packing

Before packing, the mats are rolled with the help of a rolling machine equipped at the end of the line. A stacking machine is provided for the boards.

7. Palletization

As per the necessity, the glass wool can be compressed up to ten times it is the volume for palletization. In total 36 rolls of glass obtained in the process could be packed onto a single pallet. (Soak Pit)

Advantages of Glass Wool

Glass Wool Suspended Ceiling

Glass wool as an insulating material has the following advantages,

- Glass wool has excellent characteristics such as thermal insulation and sound insulation.

- It is inexpensive, cost-effective, and comparatively less expensive than other insulators available in the market.

- It is fire-resistant material that can resist fire up to 300o C Temperature.

- Glasswool is easily available in every DIY store with other repair equipment.

- Glasswool made for being rot-proof has a long lifespan.

- It is non-hazardous to the health of the occupants residing in the house.

- Glasswool is also manufactured for being an ideal insulator for attics, cellars, and outdoor shelters because neither less it is also well resistant to rodents and other pests.

- Along with attics, cellars, and outdoor shelters, it can also insulate all kinds of surfaces such as ceilings, roof spaces, inhabited roof spaces, walls, partitions, roofs, etc.

- Being elastic and flexible in nature it is easy to install and adapts to all spaces of floors, roofs, and walls.

Disadvantages of Glass Wool

Glass wool has certain disadvantages as listed below,

- Glass Wool is very irritating to the skin and eyes; hence its installation cannot be done without gloves, mask, glasses, and protective clothing.

- It is sensitive to water, because of such reason it is only suitable for rooms that are completely waterproof and not humid.

- Also because of its sensitivity regarding water tends to settle on contact with water or moisture. So in case, your home is exposed to such conditions, it will need to be replaced from time to time.

- Though glass wool is made of recyclable materials, it possesses a negative ecological balance, particularly because its raw materials are non-renewable.

- The sound resistance property of Glass Wool is limited to restrained value.

Why Choose Glass Wool?

- Glasswool is cheaper than other insulating materials available in the market.

- Production of Glass Wool is environment friendly hence it is well suitable to use.

- Glasswool is also a durable material than other insulation options.

- One can get various advantages such as fire resistance, sound resistant, thermal insulation, etc. in a single material.

- It is easy to install because of its lightweight property.

- Also Glass wool does not possess any kind of health hazard, so widely chosen as an insulator.

Applications of Glass Wool Insulation

Glass Wool has various applications in many types of industries as an insulation material. It is widely used in construction, automotive industries, metallic buildings, etc.

1. Partition Wall

Glass Wool Wall Insulation

Glass Wool is primarily used as a sound resisting material in partition walls of residential, commercial, and industrial buildings. It is an alternative option to simple bricks walls that can offer high acoustic and fire resistance characteristics with minimum wall thickness.

The use of Glass Wool in Partition walls can offer sound reduction up to 60 dB and more, along with fire safety as per standards. Modern Partition walls used in commercial buildings should be providing more functionality than just separating rooms from one another. This requires the installation of materials uch as Glass Wool to satisfy the requirements.

2. Roof

Application Of Glass Wool In Roof Insulation

The roof allows nearly about 40% of the heat gain or loss in a structure which results in an increase in the use of appliances which subsequently encourage the wastage of energy

Insulation through Glasswool is one of the most effective ways to improve the energy efficiency of a building. Insulation provided by Glass Wool maintains building envelope, which can keep heat in during the winter, but let’s heat out during summer to improve comfort and save energy.

3. Ceiling/ Soffit

The use of Glasswool in the Ceiling/Soffit provides the advantages such as Thermal Comfort, provides a quiet indoor environment, reduces cooling time, and fire safety. Among which the major advantage of insulating the ceiling or soffit is to enhance thermal comfort.

Ceiling embedded with Glasswool Insulation can also help to sufficiently minimize the impact noise coming through roofs which can be another floor of the building.

4. Floor

Floors need insulation to reduce the impact noise reaching the floor below when it is separating two different levels. In such cases, noise generated by the people walking over the floor or the noise from appliances or machines can be isolated using Glass Wool Insulation.

Glas Wool possesses high resilient and durable compressive strength capable of absorbing impact load generated through various disturbances. Glass Wool as floor insulation in intermediate floor acts as sound resistant preventing impact sound to transmit other parts of the building through the designed structure.

5. Metallic Building

The use of Glass Wool in Metallic Building has advantages such as making building non-combustible, enhanced thermal properties of the building, optimum acoustic performance, making building durable and mechanically stable, and resisting moisture content.

Glasswool has the property to works as a barrier to heat transfer, which keeps out unwanted heat during summer and preserves warm air during winter in metal buildings.

6. Industrial Insulation

To meet your evolving needs of industries, there is a need for a developed and wide selection of industrial insulation products. Glasswool offers industries high-quality insulation material for different uses and temperatures, which are flexible to mechanical resistant, lightweight, and highly compressible wool.

In Industries a good Insulation material such as glass wool is required for safety and security, in order to reduce heat loss and make operation and processes more sustainable.

In industries, glass wool could be used with the combination of stone wool and ultimate mineral wool for an efficient and higher level of insulation with lower thickness.

7. Automotive Insulation

Glass Wool is designed and tested to quality standards to provide excellent acoustic and thermal efficiency, with fire safety and mechanical durability. It can prove to be a strong barrier against heat loss in automotive to maintain the exact temperature required in order to optimize engine performance and lower CO2 emissions to surroundings.

Nowadays it is designed to meet automotive standards of fire tests such as ISO 5660 and ISO 5658, as well as even more stringent tests like SS 024821 (INSTA 410).

Glasswool is ideal for molding, such that one can use operations such as compression molding, die-cutting, and sawing, hence one can produce components in almost any shape with a choice of finishes, which proves to be beneficial to be used in automotive.

FAQs

What is Glass Wool?Glass Wool is an insulating material manufactured from glass fiber known as borosilicate glass arranged using a binder into a texture similar to that of wool.What is glass wool used for?Glasswool is used in Partition Wall, Roof, Ceiling/ Soffit, Floor, Metallic Building, and as Industrial and Automotive Insulation.How does glass wool work?Glass Wool works as insulation and coating which can save energy by efficiently reducing the rate of transfer of heat through the components of the house. Insulation provided by GlassWool maintains building envelope, which can keep heat in during the winter, but let’s heat out during summer to improve comfort and save energy.Is glass wool the same as fiberglass?Both are the same components as Glasswool can sometimes be called fiberglass insulation or glass fiber. Is glass wool banned?Day by day glass wool is gaining its popularity and has no health or environmental hazard. This basically means that glass wool as an insulation material is not forbidden in any country today. However, it is one of the most commonly used insulation materials with lots of advantages.Glass Wool Thermal ConductivityGenerally, Glass wool thermal conductivity is between 0.023 and 0.040W/m∙K. Thermal conductivity is defined as the amount of heat (in watts) transferred through sq. area of any material of specified thickness (in mm) due to a difference in temperature.

You Might Also like