Product illustration, Roof insulation

Roof Insulation

Effective and durable roof insulation increases the energy efficiency of residential and commercial properties, throughout the year.

As well as preventing significant thermal transmission from residential and commercial properties in warm climates, It is also designed to maintain indoor temperatures during hot weather. Increasing the energy efficiency of a building can also mean reducing bills and operational costs.

We supply a variety of insulation products for flat or pitched roof applications. Form Steel roof to concrete roof be it pitched or flat roof, ROCKWOOL products are made from premium stone wool to keep your properties safe and the indoor environment comfortable.

On top of the good thermal performance, the fire-resistant and acoustic properties of ROCKWOOL products also allow for more freedom in your designs.




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Why do we need roof insulation?

Installing effective insulation in homes and commercial properties can reduce cooling requirements by up to 70%.1 As well as the cool air escaping, there’s the chance that hot air can also enter through a roof that isn’t in good shape.

In hot climates, keeping a building cool is essential.

Insulation helps to maintain the building’s correct temperature, so you can get creative with the results. Turn a loft area into a living space or an extra bedroom, or turn a flat roof into a welcoming terrace or green roof.

Insulating a flat or pitched roof can help:

  • Prevent heat transfer
  • Increase the energy efficiency of a property
  • Save money on cooling bills
  • Reduce the carbon footprint of a property
  • Improve summer comfort
  • Serviceability
  • Damping of rain noise

Calculator and savings

Every home and business is different. With various sizes and dimensions of flat or pitched roofs, as well as budgets and bills to consider, there’s no one-size-fits-all solution.

Heating and cooling buildings account for 35-60% of total energy demand around the world.2 The savings homes or businesses stand to make by reducing energy bills can more than makeup for the costs of roof insulation.

In terms of money that can be saved, energy use, and reducing the carbon footprint, installing roofing insulation is well worth the investment.

Also, the building insulation ROCKWOOL sold in 2019 will save 100 times the carbon emitted in its production over the lifetime of its use.3

Use our ROCKWOOL U-Value calculator to determine the thermal performance of the building's roofs and possible cost savings. For more details on technical specifications, visit our ROCKSPEC Specification Toolkit.

Insulation, construction, roof, attic, loft

Case Studies

The project

The remarkable and innovative Zaha Hadid-designed Port House building in Antwerp, Belgium was created as a sustainable workplace for the headquarters of Europe’s second-largest port.

The challenge

Port House required protection against the noise from technical installations on its complex flat roof, as well as effective fire protection to ensure the highest possible safety standards.

The solution

ROCKWOOL stone wool products were installed due to their effective acoustic properties, while ROCKWOOL roof insulation boards used in the building met the highest A1 Fire Class rating.

Our ‘cut to fall’ service also allowed the insulation to be custom-fitted to Port House’s unusual boat-shaped roof – facilitating swift installation and allowing the right angle for draining rainwater from the surface.


Havenhuis/ Port House - Acoustic Capabilities
The excellent acoustic performance of ROCKWOOL stone wool is an important advantage…the highly detailed cut-to-fall plan [also] helped us a great deal.

Gert Biebauw

project leader at Bureau Bouwtechniek

Sustainability and energy efficiency

Sustainability is at the heart of everything we do. Rock is one of the earth’s most abundant, most sustainable resources, and it’s our belief that the clever use of this rich material can help save others from being depleted before it’s too late.

By installing insulation sourced from innovative stone wool, our products can help reduce the amount of energy that needs to be used to heat buildings – and save money on energy bills too.

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Financial support

Local grants or schemes may be available to support projects in your market.

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