Question? Look no further.

ROCKWOOL insulation is a stone-based insulation. It is sourced from abundant lava deposits of volcanic rocks which are melted in a cupola furnace like a controlled man-made volcano. As the re-melted lava comes out of the furnace, it is spun, given water repellency treatment and bound together in a wool-like fleece.

ROCKWOOL insulation is a mineral wool, which is inorganic and ideal for thermal insulation, fire protection, acoustic control and environmental purposes. During the manufacturing process, ROCKWOOL insulation is cut, shaped and combined into many different products for a wide variety of applications including buildings, systems, services, marine and offshore.

ROCKWOOL stone wool is made from volcanic rock and achieves an European Reaction to Fire Classification of A1 - non combustible. Stone wool is also a durable choice; its properties and benefits don’t reduce or change over time and the product will effectively perform for the lifetime of the building.

Although ROCKWOOL stone wool insulation is made of rock, the natural material has been converted to a wool substance which is not difficult to handle. You might need someone to help manoeuvre the packaged product up into the loft space, but one person can easily handle our roll and loose lay products alone.

ROCKWOOL insulation is a naturally inert, rot proof material that does not encourage or support the growth of funghi, moulds or bacteria. ROCKWOOL insulation does not offer sustenance to insects or vermin.

No, ROCKWOOL insulation is a stone mineral wool manufactured from volcanic rock. Learn more about ROCKWOOL here.

ROCKWOOL insulation being manufactured from rock fibres is classified as a mechanical irritant.  As with any DIY/Construction job, the correct PPE should be worn to protect yourself i.e. gloves, long sleeve clothing, trousers, etc.  If you do get ROCKWOOL on your skin, it is recommended to rinse with cold water.  

Once installed, ROCKWOOL products will not emit fibres or particles if the ROCKWOOL products are not further disturbed.  Measurements taken within insulated buildings have shown that the levels of airborne mineral wool fibres are so low that they are not usually detectable.  ROCKWOOL stone wool insulation fibres are bio-soluble which means they are harmlessly cleared by the body should they be inhaled or ingested. 

ROCKWOOL® stone wool is made from volcanic rock and achieves an European Reaction to Fire Classification of A1 - non combustible.  It is an inorganic insulation product which falls into the category of mineral wool insulation along with glass wool.  Other foam type insulations in the market place are classified as thermoset such as PIR/PUR/Phenolic or thermoplastic such as EPS/XPS. Stone wool is versatile and as well as thermal properties, has inherent fire and acoustic benefits no matter what product you are specifying.  Stone wool is a durable choice; its properties and benefits don’t reduce or change over time and the product will effectively perform for the lifetime of the building.

Yes, we have a number of  products which have been certified by the BBA and these include:

• NyRock® Cavity 032
• NyRock® Rainscreen 032
• RainScreen Duo Slab
• ROCKWOOL High Performance Partial Fill Cavity Slab
• Full Fill Cavity Batt
• Thermal Insulation Cavity Batt
• Thermal Insulation Cavity Batt 32
• HardRock® Multi-Fix (DD)
• HardRock® Multi-Fix (DD) Tapered

No, we do not issue guarantees for individual products available for sale through distribution.  We are able to supply a standard durability statement for ROCKWOOL insulation, however, any guarantees issued will be the responsibility of the builder/contractor.  ROCKWOOL products are covered by the usual legal protection offered by the Sale of Goods Act, (so far it applies in dealings between businesses), and in accordance with ROCKWOOL's standard terms and conditions of business. 

Yes - ROCKWOOL have ISO 14001 certification. As a stone wool insulation manufacturer we also need to provide evidence that any mined or quarried material making up 20% or more of our process input should also have a certified environmental management system to show responsible sourcing.  The certificates can be found in the Certificate Library within the 'Product Documentation' section of the website. 

The ROCKWOOL Sustainability brochure contains further information on environmental credentials and recycling.

Yes, ROCKWOOL insulation has natural inherent properties for thermal, fire and sound which is present in all products. Therefore, if you are using a sound insulation slab, you will automatically get a thermal and fire benefit.  The only exception is for masonry cavity walls which must use the specific performance tested product which is ROCKWOOL cavity for full fill applications.

Yes, ROCKWOOL products all provide a thermal and acoustic performance.

The products vary in density, thermal performance, approved thickness and physical characteristics. FLEXI® as an example, is purposefully manufactured with flexible edge technology to ensure a good fit within framed applications.

Yes, ROCKWOOL products can be double layered.  We recommend staggering the joints in accordance with good building practice to minimise the potential for thermal bridging through joints.

ROCKWOOL insulation can easily be cut with a long bladed knife or insulation saw available from DIY/Builders Merchant outlets. Please ensure the correct PPE is worn when using or cutting insulation.

It is always recommended that the appropriate personal protection equipment is worn when carrying out DIY jobs.  Therefore, it is recommended that you wear long sleeves, gloves and a mask to ensure your comfort.  

Yes. To prevent possible overheating, electrical cables, transformers and the housings to light-fittings which protrude into the loft space should not be fully covered by insulation.  If electrical cables have sufficient slack in them, they should also be raised above the insulation. Transformers should be lifted clear of the insulation.  If cables cannot be raised above the insulation, a ‘derating’ of 50% should be assumed.  It is important to ensure that the current-carrying capacity of any cables to be covered is sufficient for the application – this is particularly important for heavy-duty cables serving high power items such as showers, cookers, dense arrays of lights, etc.

Sections of cable 500mm or less in length, which are covered by insulation, will not normally need to be re-routed or de-rated.  Guidance on requirements can also be found in the I.E.E. Wiring Regulations (BS 7671).

If you are building new property, ROCKWOOL Cavity Wall Batts will provide maximum energy savings. These fully fill the cavity, yet their special water repellency prevents water transmission across the cavity. If 'low energy' design is involved, wide cavity structures can use double thicknesses of ROCKWOOL Cavity Wall Batts to create improved U- values.

The second choice is ROCKWOOL High Performance Partial Fill Cavity Slab. This is a system which allows a cavity to be maintained by clip fixing the special dual-density slabs against the inner leaf. This specially engineered product offers enhanced performance due to the consistent close fit achieved against the uneven surface of the inner leaf masonry.

Approved CIGA installers will carry out an inspection to assess the suitability of the property to have blown insulation installed. Further information regarding approved installers and what to expect can be found on the CIGA website.

ROCKWOOL® fire rated cavity closers, ROCKCLOSE® and SP Firestop OSCB are designed to provide a tight, fire resistant seal in a masonry cavity around window or door openings.  ROCKCLOSE®is a first-fix built-in product which will achieve 30 minutes fire resistance and also meet the Part L requirement for minimising cold bridging. 

RAINSCREEN DUO Slab is a specially designed dual density insulation product for direct fixing to facades where a rainscreen cladding system has been selected. The outer higher density surface is robust and designed to allow for exposure to weather conditions while cladding systems are erected. Meanwhile, the inner surface makes consistent close contact with the old exterior of the building, providing a significant improvement in thermal performance.  Cladding options available can be found on the Rockpanel website.

There is no single answer to this. ROCKWOOL products are destined for a wide variety of applications needing different densities, each of which is designed into the product at the manufacturing stage. The most familiar ROCKWOOL product will be ROCKWOOL Roll, a light density 22 kilogram per cubic metre (kg/m³) material used typically for loft insulation. At the other end of the density range is a system for cladding buildings using a high density panel - Rockpanel - of compressed ROCKWOOL insulation at over 1000 kg/m3.  The versatile range of ROCKWOOL products includes rolls, slabs, boards, dual density systems, mats, pipes, fabricated and loose wools, all of which are provided in a range of densities and thicknesses suitable for their best application.

Specification of ROCKWOOL insulation products should be carried out by their application area.  It is important to ensure that the product is tested and certified for its purpose to ensure it performs as required.  This is particularly important for Fire protection/stopping applications. 

The minimum density product we manufacture is the ROCKWOOL Roll with a nominal density of 22kg/m3 which meets the 10kg/m3 minimum requirement.