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100mm RW3 Rockwool Acoustic Insulation Slab SL930 ǀ pack of 4

100mm RW3 ROCKWOOL Insulation Slab - Thermal Acoustic and Fire Performance (pack of 4)
100mm RW3 Rockwool Acoustic Insulation Slab SL930 ǀ pack of 4
  • Rockwool RW3 is fire rated Euroclass A1 non-combustible
  • RW3 Excellent thermal, acoustic and fire performance
  • RW3 insulation slabs achieve Lambda 0.034W/mK
  • RW3 is a robust insulation solution for a range applications
  • Durable insulation high performance over the lifetime of the building
Estimated delivery:
In Stock
£ 73.80
Ex VAT: £ 61.50
  • Brand: Rockwool®
  • Model: 100mm RW3
  • Dimensions: 1,200mm x 600mm x 100mm
  • SKU: 100mm
  • Product code: P1-1191
  • MPN: 100mm RW3 Prorox SL930

Options available

100mm Rockwool RW3 Thermal and Acoustic Insulation Slab (Prorox SL930) is a non-combustible resin bonded semi-rigid fire resistant insulation slab designed for use in floors, roofs at rafter level, partitions, ceilings, timber and steel frame walls.

Using RW3 Rockwool Insulation Slab in ceilings, floors and walls can help to sectionalize rooms, reducing fire spread and damage (Class ‘0’ Building Regulations) for both new build and refurbishment projects.

Rockwool RW3 1200 x 600 x 100mm is an unfaced, odourless, non-hygroscopic stone wool insulation slab with a certified thermal conductivity (lambda value) of 0.034W/mK.

These thermal and acoustic insulation slabs are free of CFCs and HCFCs and will not encourage the growth of fungi, mould or bacteria.

Rockwool stone wool products work in two distinct ways to reduce noise, either by impeding the transmission of sound through an element of the structure or by absorption of sound at the surface.

The structure of the fibres in RW3 acoustic slabs make them ideal for use as a sound absorber with water repellent qualities of the insulation preventing moisture build up, damp and rot.

RW3 rockwool slab is a long-lasting insulation material made from renewable resources which will maintain high performance over the lifetime of the building (ODP and GWP free).

Fire, thermal and acoustic slabs are easy to cut and shape with a large bladed knife or saw.

Rockwool RW3 insulation slabs are made from natural, sustainable and recyclable resources.




Width: 600mm

Length: 1200mm

Pack Quantity: 4

Slab Coverage: 0.72m2

Pack Coverage: 2.88m2

Finish: Unfaced

Density: 60kg/m3 

R-Value: 2.90m2K/W

Thermal Conductivity: 0.034W/mK

Vapour Resistivity: Negligable, Water Repellent

Building Regulations: Class ‘O’ 

Fire performance: Euroclass A1 (non-combustible)


Key points:

 · Excellent thermal, acoustic and fire performance.

 · Non-combustible Euroclass A1 material.

 · Easy to handle, cut and install.

 · Offers the highest level of fire resistance.

 · Durable insulation solution.

 · Density of 60kg/m3.

 · Maintain high performance over the lifetime of the building. 

 · Water repellent qualities.

 · Prevent moisture build up, damp and rot.

 · Excellent sound absorption characteristics provide high levels of sound reduction. 

 · Thermal conductivity (λ - lambda value) of 0.034W/mK.

 · Free from CFCs, HCFCs.

 · ODP and GWP free.



 · Ground floors

 · Internal floors

 · Separating floors

 · Pitched roofs at rafter level

 · Internal walls

 · Partitions

 · Steel frame walls

 · Timber frame walls


Certification and standards:

 · BS EN 13162.

 · ISO 14001.

 · BS EN 13501-1.

 · Complaint with Building Regulations.


*Further information may be found in our Downloads section.

Fairly easy access to all PDF files.

Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet

Board covarage 2.88 m2
Colour Light brown
Density 60kg/m3 
Length 1200mm
Material Stone wool
Pack Coverage 2.88m2
Pack Quantity 4
Profile Square Edge
R-Value 2.90m2K/W
Thermal Conductivity 0.034W/mK
Thickness 100mm
Width 600mm
Vapour Resistivity Negligable, Water Repellent
Slab Coverage 0.72m2
Building Regulations Class ‘0’ 
Coverage 2.88m2
Fire performance Euroclass A1 (non-combustible)
Finish Unfaced
Quantity 4
Shipping method Articulated Vehicle ǀ Courier
Applications Walls ǀ Ceilings ǀ Floors ǀ Roofs
Foil faced No
ETA Notification Yes
Features Fire protection ǀ Acoustic ǀ Thermal
Manufacturer RW3 Prorox SL930®

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We deliver insulation materials to Mainland UK only. Deliveries to Highlands, Northern Ireland, Isle of Wight etc.. might be possible at additional cost.
We offer free delivery on most of the orders above £300 (excluding VAT) (except special products - shipping cost via courier - products marked ''Request A Quote'')

Delivery of some insulation materials might be extended due to the current situation (Covid-19, stock shortages, allocations).
If you need materials quickly please contact us - we will do our best to help you source materials needed.

We do not deliver on weekends and bank holidays. Sometimes we can deliver on Saturdays - please check with us before placing the order.
If you need any further information please contact us tel. 02081910776

We can help to calculate price per m2 or linear meter (one meter in length) cost, please just contact us via phone 02081910776, email or live chat. Alternatively, you can work it out yourself quickly and easily: to get cost per meter square please divide price shown in orange area by ''Required area (m2)'' Example price of £28.80 divided by board coverage 2.88m2 = cost of £10.00 per m2.


No matter whether you choose a local installer or a national company, there’s a few tips to help you find the right installer for your home insulation improvements, such as asking for recommendations and making sure that they’re part of a certification scheme. This makes sure that they have the right skills and standards of workmanship to carry out the installation, and you can be sure that they know exactly what they are doing.


1. Thermal inspection picture in portfolio

It’s worth seeing a installer’s previous work. There’s no harm asking if you can see any properties nearby that they’ve installed insulation in. Best way would be to see Infrared Thermal Imaging Inspections. Thermal cameras spot small, but key changes in temperature in different areas of a house, identifying problematic areas that the human eye never could and some that a visual inspection could only hypothesize.

2. Reviews

Along with checking recommendations and previous work, finding reviews online can often be a great way to find out if they provide a good service or not. However, it’s best not to solely rely on reviews you may find or review websites, as there’s no controlling who writes them.

3. Compare prices

Comparing prices will also ensure companies can’t take advantage of you and give you a fair price. 

4. Word of Mouth

The best way to find a great insulation installer is through recommendations. Make sure you ask friends and family. They will most likely give you their honest opinion and can tell you from first hand experience.


Whether you require a wall, cladding, external wall, loft or floor insulation fitted, you can find and hire your local insulation installers from popular UK web pages. A simple internet search will return thousands of potential installers near your area.



We are the stockist of construction materials and related products for both trade and DIY from most recognizable brands in the UK like Cordek, RCM, Promat, Rockwool, Isover, Celotex, Xtratherm, Ursa, Low-E, Cedral, Kingspan, Dufaylite, British Gypsum, K-rend, Ecotherm, Iko enertherm, Kay-Metzeler, Terrawool to allow you to complete your insulation job on time at competitive prices and the highest standards.


Whether you are a large company or a DIYer, if you need a large amount of insulation materials, we can offer quantity discounts at the best prices. Please contact us and our friendly customer service will try to find the best and cheapest solutions for you. We value your time and we will try to deliver the products as soon as possible at a reasonable price to your construction site or house. The UK's leading insulation supplier near you and your needs. Price List available upon request.
100mm RW3 ROCKWOOL Insulation Slab - Thermal Acoustic and Fire Performance (pack of 4)
100mm RW3 Rockwool Acoustic Insulation Slab SL930 ǀ pack of 4
£ 73.80