Rock wool, commonly referred to as mineral wool, is offered for sale in easy-to-install batts that resemble fiberglass. However, unlike what one might think, rock wool is made of boulders rather than fluffy glass fibers. Think of a cotton candy machine that contains liquid rock. The strands are collected, flattened into thick mats, then separated into convenient-sized insulation batts. 

What are the major features of Rockwool?

Rockwool 75mm RWA45 unique composition produces high-performing insulation with the following features:

often comprises up to 75% recycled material and is created from sustainable, natural resources.

efficiently absorbs air and holds onto heat, slowing the transfer of heat.

exceptional water resistance

exceptional auditory qualities

superior insulating value in comparison to fiberglass

Performance for an extended period of time—rock wool doesn’t degrade with time, allowing moisture to evaporate (which deters mold and mildew)

As thick, solid batts are friction-fit into place, no staples are needed.

Where is the rockwool used? 

Rockwool 75mm RWA45 insulation may be used in place of fiberglass or another type of insulation on walls, floors, ceilings, attics, and crawl spaces. However, it excels in sound deadening interior areas, such as music studios or video rooms, as well as rooms on the frigid north side of the house.

Due to its excellent fire resistance, rock wool is usually required by code for use as a firestop between storeys of a structure. (When remodeling or creating a new structure, ask the local construction inspector to identify specific spots that necessitate the use of rock wool fire stops.)

You might wonder why rock wool insulation isn’t used instead. Cost is the reason, in this case. You can keep your home at a comfortable temperature for extended periods of time without altering the thermostat, so you’ll rapidly make back your initial investment. 

Heating rocks create rockwool until they resemble lava

The process used to make Rockwool 75mm RWA45 insulation helps to explain the product’s actual ability to withstand fire. The majority of its components are basalt rock and slag, a waste product of the recycling of steel. These substances are boiling, liquefying as a result, and combining to form a substance that resembles lava. More than 2,900 degrees Fahrenheit are required for these materials to melt.

After that, the mixture is compelled into a sizable spinning chamber where it is spun into fibers. These fibers are then gathered and ground into a mat that may be separated into slabs of Rockwool insulation.

Between 16 and 75 percent of it is made of recycled materials

The firm claims that the average percentage of recycled materials in the brand-specific Rockwool insulation is between 16 and 40%. The U.S. Department of Energy notes that mineral wool insulation frequently contains 75% recycled materials.

Rockwool insulation is excellent for isolating rooms from noise

Rockwool insulation tends to be heavier than fiberglass insulation, which may not be to everyone’s taste. However, this serves to delay the passage of heat and has the added benefit of dampening sound waves. The material slows down and occasionally totally blocks sound waves as they try to pass through it, resulting in built-in soundproofing.

Although the insulation’s thickness aids in noise isolation, Rockwool’s soundproofing properties come from its density. Due to its density, which ranges from 0.5 to 1.0 pounds per cubic foot, fiberglass insulation may dampen sound by 4 to 10 decibels.

The substance can withstand heat up to 1,400 degrees Fahrenheit

As previously mentioned, Rockwool insulation is made from actual rocks and steel slag, which must be heated to temperatures above 2,900 degrees Fahrenheit to combine the components and produce this incredibly efficient insulation. This explains why some Rockwool products can withstand temperatures of up to 2,150 degrees Fahrenheit without melting, smoking, or catching fire, but mineral wool products in general can withstand fire, flames, and heat up to 1,400 degrees.


Additionally, because there is no energy source present in Rockwool 75mm RWA45 insulation, mold and mildew cannot grow there. Customers are less likely to open a wall and find a potentially fatal biological problem thanks to testing and certification that Rockwool products are resistant to the growth of fungus.

Read more interesting articles at homecreatives


Please enter your comment!
Please enter your name here