5 Things You Should Know About Rockwool Insulation Before Installation

Rockwool 100mm Insulation RollBatt Loft is a versatile, lightweight moderate density insulation matt specifically made for use in roofs, partitions, and suspended ceilings to enhance thermal and acoustic performance while lowering fuel consumption and utility costs.

Fiberglass insulation has remained a popular choice for decreasing heat transfer through a home’s walls and ceilings. While fiberglass has the extra benefit of establishing a fire-resistant barrier between the interior and outside walls, it may still fall short of Rockwool’s inherent capacities. Rockwool, like fiberglass, is an insulating material that is often used in residential, commercial, and industrial structures.

On the other hand, Rockwool may be distinguished from fiberglass by comparing its fire resistance, heat retention, moisture resistance, and soundproofing qualities. Continue reading to learn further about Rockwool insulation.

1. Rockwool is created from rocks that have been heated to a lava-like liquid.

Rockwool insulation’s manufacturing method helps illustrate the product’s genuine fire-resistant capabilities. It is mainly made of basalt rock and slag, a recycled steel-making byproduct. These elements are superheated, causing them to liquefy and combine into a lava-like liquid. Temperatures must reach 2,900 degrees Fahrenheit to fulfill these chemicals.

The superheated liquid is then stretched into fibers by being blasted into a massive spinning chamber. These fibers are then collected and crushed into a mat, which may slice into Rockwool insulating slabs.

Using this method to create Rockwool removes all organic matter, considerably enhancing the end product’s mold and mildew resistance.

2. Rockwool retains heat quite well.

Both fiberglass and Rockwool are good in making your house cool during the summer and warm during the winter, although Rockwool has higher thermal efficiency.

Fiberglass insulation, on the other hand, tends to lose thermal efficiency over time as it degrades. The thermal performance of Rockwool insulation remains steady during the structure’s lifespan due to the construction and materials used to produce it. However, Rockwool insulation is more expensive per sq. foot than fiberglass insulation.

3. It comprises between 16 and 75 percent recycled material.

The data concerning mineral wool insulation, in particular, have contributed to the uncertainty about the quantity of recycled material utilized to manufacture Rockwool insulation.

Rockwool is a brand of mineral wool insulation that has become so popular that the name has become synonymous with the relevant phrase, mineral wool. According to the manufacturer, Rockwool insulation is generally constructed of between 16 and 40% recycled materials.

The percentage of recycled items in Rockwool insulation is generally inaccurate because the individual product ultimately determines it. Standard Rockwool insulation may include just 16 to 40% recycled material, whereas slag Rockwool insulation may contain up to 75% recycled material.

4. Rockwool is a long-lasting insulating material.

This insulating material’s endurance is difficult to argue, considering that it may sustain its thermal efficiency over many decades with negligible loss in R-value.

It is mainly owing to the materials used to manufacture Rockwool insulation. Which includes rock and steel slag, which are recognized for their excellent longevity and inherent resistance to deterioration and corrosion.

However, the endurance of Rockwool is not limited to the material’s capacity to retain heat. Rockwool insulation’s excellent water resistance, mildew, mold, and fire resistance further add to its endurance and capacity.

It is particularly true of the material’s moisture-resistant properties, without which the insulation might collect. And hold water from humid air, causing the material to degrade prematurely.

5. The material can withstand temperatures of up to 1,400 degrees Fahrenheit.

As previously stated, Rockwool insulation is made from rocks and steel slag. That must be heated to 2,900 degrees Fahrenheit to combine the components and make this incredibly efficient insulation.

Given this, it stands to reason that mineral wool goods generally can withstand fire, flames, and heat up to 1,400 degrees Fahrenheit. In comparison, other Rockwool products can withstand temperatures as high as 2,150 degrees Fahrenheit without smoking, melting, or catching fire.

This remarkable heat resistance is excellent for home construction. Because the insulation produces a fire-resistant barrier between the interior. And outside of the structure, rooms, and floors, delaying the spread of fire. It should mention that fiberglass insulation is also quite heat resistant; however, it begins to melt at around 1,100 degrees Fahrenheit.

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Rockwool insulation is inorganic. It is an unsuitable medium for mold and mildew growth because there is nothing for them to rely on. In reality, Rockwool products have been tested and verified as resistant to fungus development. Lowering the likelihood that consumers would open the wall and discover a severe biological condition.


  • Kyle Gordon

    Hi there! My name is Kyle Gordon, a part-time week-end warrior renovating homes, house flipper, and full-time IT engineer. This blog is a collection of my extensive experiences as a remodeler, renovator, and home improvement enthusiast. More so, I'm here to share with you lots of great ideas and experiences you can use to make your home into your dream home: we'll cover demolition, design, implementation, and development of many past and furture projects.