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What’s the Difference Between Rock Mineral Wool and Glass Mineral Wool?

Both Rock Mineral Wool and Glass Mineral Wool are types of insulation, but they are different in a few ways. They can be confused with each other because they have very similar names, but they are not the same.

In this post, we’ll look at what both types of insulation are, how they are made, and what situations you might use them in.

What Is Rock Mineral Wool?

Rock Mineral Wool insulation is made from natural rocks, more specifically basalt, a type of volcanic rock. It is heated until it becomes molten and is then spun into fibres. This forms a mat that can be used as insulation.

Typically they are made into slabs and because the materials are extremely dense they are great for use as soundproof insulation.

Rockwool is one of the most popular brands of rock mineral wool insulation slabs. We sell a range of Rockwool insulation slabs, the best selling product being the 100mm RWA45.

What Is Glass Mineral Wool?

Glass Mineral Wool insulation is made from recycled glass that is melted down and spun into fibres. For this reason, it is also known as fibreglass.

This type of insulation is made into slabs and rolls which are used in a variety of applications such as walls, ceilings, and floors.

Knauf Insulation is one of the most popular manufacturers of glass mineral wool insulation products. Loft insulation roll is a frequently bought product, specifically the 200mm Loft Roll 44.

How Are They Different?

There are a few key ways that rock mineral wool and glass mineral wool differ:

– Rock Mineral Wool is made from natural rocks while Glass Mineral Wool is made from recycled glass.

– Rock Mineral Wool insulation slabs are typically much heavier than glass mineral wool insulation products.

Glass Mineral Wool is cheaper than Rock Mineral Wool.

– Rock Mineral Wool usually contains a water-resistant resin, while Glass Mineral Wool may allow water into the insulation.

Applications

Rock Mineral Wool insulation can be used in a variety of applications due to its density and fire-resistant properties. It is often used in:

– Walls

– Floors

– Ceilings

Glass Mineral Wool insulation is most commonly used in residential and commercial buildings. It can be used in:

– Walls

– Ceilings

– Floors

– Lofts

– Ceilings

Which One Should I Use?

The type of insulation you use will depend on the application. If you need a dense, soundproof material, then rock mineral wool is a good choice. If you need lighter-weight insulation for your walls or loft space, then glass mineral wool is a good option.

You can also combine both types of insulation to get the best of both worlds. For example, you could use rock mineral wool in partition walls to stop the transfer of noise and glass mineral wool in your loft to help retain heat in your home.

If you’re unsure what’s best to use, then contact us and we can help advise. We sell both Rock Mineral Wool insulation and Glass Mineral Wool insulation at Materials Market.

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