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It is impossible to overestimate the value of a home with good insulation: Insulation that is appropriately placed and fitted may keep you more relaxed in the summer and warmer in the winter while also lowering your energy costs. Rockwool 50mm RWA45 provides one of the best insulation.

For many years, fiberglass insulation has become the material of choice for both homeowners and home builders. While fiberglass continues to be a favorite, a relatively new kind of insulation is gaining traction and generating news in the insulation sector. Rock-wool insulation is what it is known as.

What Is Insulating Rock Wool?

Rock wool, also known as mineral wool, is sold in fiberglass-like batts that are simple to install. But rock wool is constructed of rocks, which doesn’t even seem imaginable, not fluffy glass fibers, as one might expect. Here is a quick breakdown of the production process.

About 3,000 degrees are used to heat natural rock in a furnace till it melts into a liquid. The magma-like liquid is spun into long fiber strands after being subjected to a high-pressure jet of air or steam. (Consider a cotton candy machine with liquid rock within.) The strands are gathered and flattened into substantial, dense mats, which would then be divided into handy-sized insulation batts.

Rock wool’s unique makeup results in high-performing insulation with the following characteristics:

  • It is made from sustainable and natural materials.
  • Effectively captures air and retains heat, which delays the flow of heat.
  • It is extremely water-resistant.
  • Fire-resistant and incombustible up to roughly 1,400 degrees.
  • It has outstanding acoustical characteristics.
  • It usually contains up to 75% recycled material.
  • It has more excellent insulation value compared to fiberglass.
  • It enables moisture evaporation.
  • Performance over the long term—rock wool doesn’t deteriorate with time.
  • No stapling is required as dense and solid batts are friction-fit into position.

Where to Use Insulation Made of Rock Wool?

Rock-wool insulation may be used anywhere that fiberglass or another form of insulation would be laid, including floors, walls, ceilings, attics, and crawlspaces. However, it works particularly well for internal spaces that need sound deadening, including media rooms or music studios, as well as rooms on the house’s chilly north side.

The usage of rock wool as a fire stop between levels of a house is perfect and frequently mandated by code due to its strong fire resistance. (When rebuilding or building new, ask the neighborhood building inspector to point out particular locations that call for rock wool fire stops.)

Rock wool is very simple to work with; it may cut the rigid batts with a handsaw or serrated knife to fit precisely where they need to go. When wet, water rolls off without absorbing the fibers and beads up. There is little possibility of the insulation sliding out of place or sagging down, significantly reducing its insulating properties because the rock-wool fibers are packed so closely together.

Remember that rock-wool insulation is only offered unfaced, without a kraft paper or foil barrier. Based on the circumstances, you might need to install a separate permeable membrane to act as a vapor barrier.

Rockwool enables moisture to evaporate while thwarting the development of mold.

Rockwool is made specifically for use in bathrooms and kitchens, two spaces vulnerable to excessive humidity. Due to the moisture-resistant and vapor-permeable properties of Rockwool insulation, any liquid water will drain away from the insulation rather than soak into it, and any gaseous water vapor will flow through the insulation without dampening it.


You might be wondering why insulation other than rock wool is being put in at this time. It is because of cost.

For the same wall, rock-wool insulation costs more than fiberglass insulation. That’s a huge difference, especially if you are insulating a significant addition or the whole house.

Rock wool insulation has an R-value of 23, whereas fiberglass insulation has an R-value of 19, so you will often save money on your energy costs by upgrading. Because you can maintain a pleasant temperature in your house for extended periods without adjusting the thermostat, you will quickly recover the original investment. Additionally, your residence will be well-insulated with minimal maintenance required for years to come because of the long-term durability of rock wool insulation.

Because Rockwool is permeable, it is excellent at reducing moisture in a house. It allows moisture to pass through a wall and into the open air.

A reliable insulation option for various conventional infrastructure projects and specialized demands is Rockwool 50mm RWA45. It’s crucial to consult a professional about having Rockwool insulation placed if you’re thinking about doing so for your home. It would be able to advise you on the installation procedure and the cost. They can also contribute to the success of the installation and the creation of a wholly insulated home.