Rockwool Insulation

Dual Density Rockwool insulation in London is commonly used for external wall applications. Hardrock® Multi-Fix Dual Density insulation is made using environmentally responsible rockwool, a mineral fibre insulation comprised of basalt (a type of volcanic rock) and recycled slag (a byproduct of steel production). The outer side of the slab is capable of directly accepting renders, while the inner face is malleable and able to adapt to the rough surfaces it is likely to encounter inside the wall itself.

The Unique Benefits of Rockwool Insulation

Rockwool is a unique type of insulation with a wide range of notable features and benefits including:

  • The fact that it is made from sustainable materials.
  • Rockwool exhibits outstanding fire resistance and is non-combustible.
  • It is extremely water repellent.
  • It also acts as a high-quality acoustic insulation.
  • Rockwool has a higher R-value than some other types of insulation, including fibreglass
  • It does an outstanding job trapping heat.
  • It is able to retain heat while remaining highly breathable, which prevents mould.
  • Rockwool insulation slabs are very easy to install, with no staples or nails necessary.
  • It does not degrade like fibreglass will.

Rockwool Insulation: Applications

Rockwood External Wall Dual Density Slab thermal insulation can be installed virtually any place you would normally install fibreglass batts, which includes cavity walls, ceilings, crawlspaces and attics. Because of its outstanding thermal and acoustic capabilities, it is often used as an external wall insulation, particularly in those walls on the cold, northern side of a structure. Because of its acoustic and fire properties it also often finds its way into internal walls. And it is not uncommon for it to be used in ceilings to create a fire break between the floors of a house.

Easy to Work With

Rockwool insulation is easy to manipulate, shape and install. It is semi-rigid yet can be cut effectively with a serrated knife and given a very snug, custom-like fit. The fact that it is highly water repellent means that should water intrude into the wall or floor cavity it will roll off without soaking into and compromising the fibres. In addition, rockwool insulation will not compact over time like fibreglass. Instead, it will maintain its snug fit and retain the outstanding thermal and acoustic capabilities we mentioned earlier.

Rockwood External Wall Dual Density Slab thermal insulation is slightly more expensive than fibreglass and that can be a deciding factor for some budget-conscious homeowners. However, any additional installation cost we’ll likely be recouped within just a couple of years via lower energy bills. Stop by one of the Licata showrooms and distribution depots in London today to learn more.


Rockwool – HARDROCK® Multi-Fix (DD)

External Wall Dual Density Slab is a stone wool insulation specifically developed for use in external wall insulation systems.
Made using a ROCKWOOL-patented ‘dual density’ manufacturing process, the top layer of each slab has a distinctly higher density than the remainder of the product.

This provides a robust outer surface for applying render and accepting fixings, while the resilient underside can accommodate unevenness in the substrate.

To aid installation the top layer is branded with ‘THIS SIDE UP’, allowing for quick and easy identification of the outer surface.

Versatile Rockwool Insulation

While often used in external walls Rockwool slab insulation can be installed just about anywhere you might otherwise install fibreglass batts. That includes ceilings, lofts, cavity walls and elsewhere.

Because it is denser than fibreglass, Rockwool insulation exhibits better fire resistance and is capable of withstanding high temperatures for extended periods of time. That density also gives Rockwool its outstanding acoustic insulation properties while its mineral composition enables it to repel water.

Hardrock® Multi-Fix Dual Density insulation is semi-rigid so it can be easily fashioned to effectively dovetail with virtually every type of space. Should moisture intrude into the space the Rockwool will not absorb it, but rather repel it and allow it to evaporate.

Price vs Value

Rockwool Dual Density Slab insulation is slightly more expensive than fibreglass batts. It’s true. But its higher R-value, moisture resistance, and ability to retain its shape over the years means additional savings that should more than offset the higher initial expenditure. In other words, it’s a better long term value than fibreglass.

Trust Licata

Licata has more than 50 years’ experience providing leading-edge insulation and render solutions for the UK market. To learn more about Rockwool insulation for London buildings visit one of our 3 London showrooms today.

Additional Info

Thickness 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 180mm, 200mm, 210mm, 220mm, 250mm

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