Stone wool steel roof insulation provides extra thermal, acoustic and fire protection while saving energy costs – making it popular for both industrial and commercial projects.

Our flat roof. They’re sustainable, durable and fire-resistant, making them an ideal solution for an array of properties and building types1.

They also act to enhance your building’s mechanical performance, allowing the deck’s use for a range of possibilities, and offering perfect dimensional stability in the process.

Why do we need steel deck insulation?

Steel deck structures, constructed as warm roofs and often made with a small slope, are typically used in connection with larger industrial or commercial buildings. In recent years, however, construction has become more commonplace for offices and even residential buildings.

Effective steel deck insulation can create a more comfortable living and working environment for inhabitants or workers, providing an important layer of acoustic protection against nuisance noise caused by overhead aircraft or the impact of weather, and thermal protection when the climate is especially hot or cold.

In the long-term, insulation can also reduce energy costs by lowering the amount of energy needed to heat or cool the inside of the building.

The main benefits of quality steel roof insulation include:

  • Energy efficiency – up to 25 percent of energy is often lost through the roof of a poorly insulated building, leading to large energy bills.
  • Increased fire safety – stone wool provides an extra layer of protection against the spread of fire and smoke.
  • Acoustic blocking – our insulation offers an extra layer of protection from noise pollution. It also prevents noise from industry escaping into nearby residential areas.

Calculator and savings

Our steel deck solutions generally offer a relatively fast payback time in terms of money, energy and CO2 footprint.

There is no set formula for how much of a given product you’ll need for your project. Instead, this will be determined by the size and shape of your building. To calculate how much you’ll require, you can use our local U-value calculators.


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ROCKWOOL solutions for flat roofs are durable and proven by more than 40 years of use in most markets.

Kim Brandt

ROCKWOOL Global Product Manager

Sustainability and energy efficiency

Our products are created to improve sustainability and modern living. By using volcanic stone, one of the most abundant natural materials in the world, we make sure our insulation is long-lasting and can be recycled again and again.

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Financial support

There may be local schemes and tax incentives available to help finance your insulation project. Contact us to find out what is available in your country.

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