Skip to main content

Product Highlight: The Benefits of Rockwool Insulation


Our factories mimic the natural process that occurs inside volcanoes, spinning and cooling a lava-like substance in a controlled environment. The raw material – diabase rock –is a renewable and plentiful natural resource, making ROCKWOOL® stone wool highly sustainable. We also substitute virgin raw materials with similar waste materials, turning more than 300,000 tonnes a year of ’rubbish’ into a valuable resource.
To make ROCKWOOL® stone wool, coke is added to the raw material fed and into the top of the cupola furnace which operates at over 1500ºC. The melt runs out of the bottom onto the spinning machine, where the fibres are spun. Minor amounts of binder and oil are added, and the wool is collected on a belt conveyor in the spinning chamber.

The structure and density of the wool is adjusted before it enters the curing oven (and maintained after the binder has been cured). The cured wool then proceeds to the cutting saws and packing equipment or is led to off-line equipment for special treatment.


Our stone wool waste and residue materials from other industries are compressed into recycling briquettes to be melted and processed into new stone wool. In fact, more than 75% of our stone wool waste is recycled.
And whilst we’re investing to improve that figure even further, it’s reassuring to know that the remaining ROCKWOOL® waste can be sent into mineral waste landfill without environmental risk.


Although we need very high temperatures to produce it, ROCKWOOL® insulation is quick to repay the energy needed in the manufacturing process.

It takes just five months after installation to generate a positive energy balance. During its lifetime, ROCKWOOL® insulation will save more than 100 times the energy used in its manufacture.


ROCKWOOL® products are easy and safe to use. The World Health Organisation has left stone mineral wool off its list of potential carcinogens following long-term studies. After more than 60 years in use, ROCKWOOL® has proven to be the safe choice.


Popular posts from this blog

The Beginners Guide to Pipe Insulation: Flexible Foams

Next up in the series we are doing on pipe insulation is "flexible foams"; a category that includes polyethylene and expanded nitrile rubber.

Polyethylene Pipe Insulation
Climaflex pipe insulation is the UK's leading brand for polyethylene pipe insulation. This is the grey foam that most people are familiar with, the kind you would traditionally find in garden centres for example. Polyethylene is the cheapest, widely available product in the market. People very often wrongly assume cheap means poor quality, this is not the case with a brand such as Climaflex. It has a thermal conductivity of 0.034 W/m.K at 0°C which is broadly equal to that of any other flexible foam, and it also has a much higher "μ factor" than other foams, making it more resistant to moisture ingress. These facotrs make it ideal for use around the home, being easy to work with and providing good insulation. 
The material can be purchased in 1m and 2m lengths, and is available in wall thicknesse…

The Beginners Guide To Pipe Insulation: Getting to grip with the basics

Our Beginners Guide series of blogs will look at the common areas of pipe insulation lagging that you will want to look at when choosing your product. This guide will be of most interest to the DIY installers, but some of our later guides will cover more complex products and areas of application.

One of the things we get asked about a lot is what the dimensions quoted for pipe insulation actually mean. You will always see three measurements quoted when describing pipe insulation; Wall Thickness, Bore Size and Length.

In the below diagram, A is the "Bore" and B is the "Wall".

Wall thickness is very simply how much insulation you have; so for example if you have 13mm Wall pipe insulation, then that means you have 13mm of insulation on either side of your pipe. This thickness is very often one of the most important part of your decision; too thin and you might not get the results you are looking for but too thick and it might not fit between your pipe and the wall.


Frost protection for domestic pipes

With the cold weather approaching we thought it would be a good idea to touch on how best to protect your pipes from frost this winter.

When dealing with frost protection on pipes inside a building your aim with insulating them is to delay the onset of freezing for as long as possible; it is not possible to guarantee a pipe will not freeze by insulation alone. The better the insulation, and the thicker the insulation, the longer you will give yourself. Under normal circumstances you aim to give yourself about 8-10 hours protection against sub zero temperatures. With pipes inside a home this is usually long enough to be sure the pipes will not freeze.

Ice formation inside the pipes will lead to an increase in pressure. As the water tries to flow this pressure will increase, and eventually will lead to the pipes bursting. A burst pipe can cause a lot of problems, not least of which is a lot of damage to your property and a lot of expense incurred.

Water regulations state that all water …