Cladding façade systems – incorporating effective insulation together with external cladding – are a key tool to ensure a building prevents as much energy loss as possible. 

The use of stone wool insulation also enhances protection against fire damage and outside noise. 

Consisting of a multi-layer solution which ends with a ‘second skin’, these systems are created using cladding products, insulation slabs, and the creation of an air gap that can be ventilated or not.

Vertical external cladding acts as a filter – and physical border – between the building envelope and the outdoor environment. Facade cladding is not only used to protect a building against environmental conditions, but also to determine its appearance.

This ‘second skin’ creates a channel over the external wall which allows air to travel through the cavity and keep the two layers in good condition.

Covering both ventilated façade and curtain wall applications, these systems protect buildings from the elements, and improve the aesthetics of buildings in need of a ‘makeover’ too.

External façade cladding systems which utilise proper insulation materials also promote energy efficiency – an important part of new build performance, or upgrades to an existing structure.

SP Firestop OSCB

To support simplified specification of fire stopping solutions in rainscreen systems, the SP Firestop OSCB range has been streamlined to provide two formats, both of which have been proven to provide up to 120 minutes fire integrity and insulation when tested to ASFP TGD-19.


The benefits of ROCKWOOL SP Firestop OSCB include:

  • Tested to ASFP TGD-19
  • Proven to provide up to 120 minutes fire integrity and insulation
  • Available for cavity widths up to 600mm (OSCB 25) and 425mm (OSCB 44)*
  • Easily identifiable white (OSCB 25) and red (OSCB 44) weatherproof polythene wraps
  • Weather resistant
  • Easy to store, handle and install


Learn more about SP Firestop OSCB on our dedicated product page:

SP Firestop OSCB

Why do we need cladded façade?

The benefits of a cladded façade for new and existing builds is a matter of function as well as form. With a wide range of styles available, designers and other stakeholders can settle on a material that’s not only affordable but also aesthetically pleasing.

Choosing the right products – such as ROCKWOOL stone wool insulation with Rockpanel cladding – can help a structure conform to the highest fire safety standards.

ROCKWOOL insulation also helps ‘keep a lid’ on energy use, so to speak. By offering consistent performance all year round, properly installed facades insulated with our products minimise the need for additional cooling and/or heating inside the building during a year’s most challenging weather conditions.


With ROCKWOOL insulation installed, they improve:

  • Acoustic properties
  • Aesthetics
  • Fire safety standards
  • Energy efficiency

Calculator and savings

When installed effectively, insulation can reduce a building’s heating needs by up to 70 percent1. ROCKWOOL products can help you make significant savings in the long run by encouraging you to invest in an all-round insulation solution.

We have a variety of tools, calculators and data sheets on our website to help you decide on the most efficient course of action. Quantities and products needed will vary between projects (as well as between countries) so it’s best to ensure you have the right tools for the job. 

Discover your optimal thermal and acoustic requirements with our U-Value and Acoustic Calculator tools.

house, calculator, funds, state subsidy, germany
Most of our façade products are made using innovative Dual Density technology. The slabs are easy to install and extremely durable.

Erica Bazzini

Global Product Manager, ROCKWOOL Group
To be updated
11.2 MB


To be updated
2.5 MB

Routes to Compliance

To be updated
609.0 KB

Rainscreen Acoustic Reference Guide

Download our guides

Financial support

The UK government has announced that it will be providing a fund for the removal and replacement of unsafe cladding systems. Read more.

Energy Efficiency, Key, Keyboard, Button


What is the non-combustible rating?
How well does a cladded façade perform in soundproofing?