INSULATION
BLOCK technology. R
ock has evolved naturally over millions of years and has been the standard of construction since the stone age. But in a world where customers need building materials to work harder than ever, how can manufacturers advance the process?
Q: What is NyRock and how does it work? A: For the past 80 years, ROCKWOOL has been using diabase rock that’s naturally produced by the earth’s crust to make our insulation. We melt down this rock and then spin it on machinery to form a fleece that’s then made into a variety of sizes and densities for insulation.
NEW ROCK ON THE
James Francis, product manager for General Building Insulation at ROCKWOOL UK, talks to BMJ about Rockwool’s latest range of products made using NyRock®
With NyRock technology – which is pronounced ‘new’ and is the Danish word for new in a nod to our Scandinavian heritage – we’ve built on our production processes. Amongst other things, we’ve added new spinners to make a more efficient fibre structure that’s denser and traps more air.
This extra air helps slow the transfer of heat further and means we’ve made a range of insulation with improved thermal performance. As a result, our new products with NyRock technology are the most thermally efficient stone wool insulation available currently in the UK and Ireland.
Q: What products are available with NyRock? A: For trade customers, we have two new products that will form part of a new, extended ROCKWOOL Trade Range. These are Thermal Insulation Cavity Slab 32 and Thermal Frame Slab 32 which were launched at the end of October.
ROCKWOOL Thermal Insulation Cavity Slab 32 is BBA approved for masonry cavities and can be used in both full fill and partial fill applications.
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The 32 in the product name refers to the lambda rating of these products and is measured in Watts per Metre Kelvin (W/ mK). Both Thermal Insulation Cavity Slab 32 and Thermal Frame Slab 32 have a 0.032 W/ mK lambda rating. Lambda is represented by the symbol ‘λ’ and is a measure of thermal conductivity – how easily heat passes through a specific material. With insulation, you want a material with low thermal conductivity, so a lower lambda value is better.
As Thermal Insulation Cavity Slab 32 and Thermal Frame Slab 32 have lower thermal conductivity values, both products are a great solution to the more stringent thermal requirements of Approved Document L in England that were introduced in June this year. When you need to achieve a U-value of 0.18 W/m²K for example, builders can use 150mm of Thermal Insulation Cavity Slab 32, depending on the wall build up planned, which is 25mm thinner than the standard stone wool cavity products within the same wall build up.
The second product we’ve launched is Thermal Frame Slab 32 which can be used in a variety of external timber and steel applications, including with a brick outer and with or without a service void.
Q: Why is this good news for customers? A: Most builders are aware of the huge benefits of stone wool, but until now, levels of thermal performance weren’t quite on par
www.buildersmerchantsjournal.net November 2022
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