Attic insulation can be added to a pitched roof or loft attic space – and it can be applied in a number of ways. In the case of unfinished wooden floors, light weight slabs can be applied. 

When the floor has a finishing layer or is made of concrete, high density boards are common. This also leaves a remaining, walkable surface.

Our range is made from premium stone wool, providing a cost-effective and energy-efficient solution to maintaining consistent temperatures.

Learn all about it – and discover which ROCKWOOL product is right for your building or renovation project.

Why do we need attic insulation?

As heat normally rises, uninsulated lofts and attics are prime places where it can escape from a building. Cold air can also easily enter.

The short-term solution? Turn up the heat when it’s cold – and put the air-con on when it becomes hot.

However, this wastes a lot of energy and leads to bigger heating and electric bills – as well as having a negative impact on the environment.

Installing loft insulation on the attic floor, between and above joists, or on top of floor planking or concrete, can combat this – keeping temperatures at a stable level throughout the year.

Premium insulation helps to:

  • Make buildings more energy efficient
  • Keep homes warmer during winter and cool during summer
  • Improve a building’s carbon footprint

Quality ROCKWOOL stone wool can last the lifetime of a building1, passing on the savings to the people who live and work in those spaces for decades to come.

Calculator and savings

When installing batts, measure the length and width of the floor to calculate the total surface. Then, determine the insulation thickness required, based on the construction build and thermal regulations. Use these figures to work out the amount of m² you’ll need.

Attic insulation is normally installed by a professional installer, to do it quickly and securely. Taking the surface area and the required installation thickness will give you the information needed to calculate the amount of insulation to be applied.

More detailed information on how to calculate the amounts needed, and tools to provide you guidance as to the thermal performance, can be found on local web pages.

Insulation, construction, roof, attic, loft
Through the relative high density and volume in combination with the closed layer, ROCKWOOL loft insulation also improves the acoustic performance of the floor – reducing external sounds coming into your sleeping room and providing peace of mind.
The intrinsic good fire performance and high fire resistance will further set your mind at ease.

Roger Peeters

Global Product Manager, ROCKWOOL Group
The effect of the installation can be felt immediately. No more cold draughts through cracks in the ceiling, or the uncomfortable feeling of a cold surface.

Roger Peeters

Global Product Manager, ROCKWOOL Group

Sustainability and energy efficiency

We want to enrich modern living for people and wider society, with products that are both life-enhancing and sustainable.

ROCKWOOL products are made with these core aims and values in mind. They use high-quality, stone wool materials to ensure new buildings are fully insulated.

Roll Insulation, Loft, Attic


How long does attic insulation last?
What is the thermal requirement for attic insulation?
Is batt insulation better than blown?