Product illustration, basement, sound, floor, insulation

Floating Floor Insulation

Installing insulation under floorboards helps to improve thermal and acoustic performance of ground, intermediate, separating and floating floors.

Learn how our high density, stone wool insulation boards lower the carbon footprint of buildings, improve the acoustic performance of their floors – and make them more energy efficient too.

Get the resources you need with our Quick Start Links

Browse our Product Catalogue

Why do we need floating floor insulation?

High-rise developments often use floating floors to block unwanted noise from traveling through the floor and reaching occupants below.

Floating floor insulation boards disconnect the surface that is being walked on, from the load bearing floor. This helps to block excess sound traveling through and helps tenants enjoy better sleep, and improved quality of life – thanks to the reduced noise1.

Insulation boards can also be placed underneath ground floor spaces, helping to lessen draughts and block cool air which may escape the property – reducing heat gained.

Premium floor insulation boards:

  • Reduce noise between floors2
  • Prevent excess energy consumption3
  • Lower heat loss through floor spaces

ROCKWOOL stone wool won’t deteriorate over time. Maintaining its shape and performance throughout the lifespan of a building, it provides insulation for life4.

Calculator and savings

To work out how much insulation you’ll need, determine the m2 surface of the entire floor space. Then, for the required thickness, you can find acoustic reports and required performance levels on our relevant product webpages.

Acoustic reports and calculator tools may be available with data that is relevant to your local market. These can help you find the optimal solution for your building or renovation project.

To reduce energy bills, the insulation of ground floors is often extremely valuable. Adding a thermal insulation layer, in combination with acoustic floor products, can help achieve lower energy bills.

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



Ventilated facade - ROCKPANEL
With several dedicated ROCKWOOL insulation products for floating floors, we can meet the specific needs and requirements of many building applications.

Roger Peeters

ROCKWOOL Group Product Manager

Case Studies

The project

University Hospital Olomouc’s new intensive care centre became the first healthcare unit in the Czech Republic to be named a zero-energy consumption development.

The Pavilion II Clinic, a five-storey building, was built in 2018.

The solution

The chief architect chose ROCKWOOL solutions for pipes, walls and flooring. They cited the thermal performance of stone wool in the insulation as a way to hit their zero-energy level target.

ROCKWOOL floor insulation boards were part of the package. Resistant to the growth of mould, rot and harmful bacteria, these boards were a natural choice for a hospital setting where hygiene is crucial.

The results

  • Lower energy bills per month
  • Comfortable environment for patients and staff
  • Regulated temperature inside during summer

Read more about the University Hospital Olomouc project.

Case Study, Olomouc
When installing acoustic floorboards, ROCKWOOL insulation can be combined with existing floor heating systems, adding to tenant comfort levels.

Roger Peeters

Global Product Manager, ROCKWOOL Group

Sustainability and energy efficiency

When we develop insulation solutions, the environment is at the forefront of our minds.

Our production process uses as little water as possible, resulting in zero water waste discharge for the environment10.

We use both raw and recycled materials too, ensuring 70 percent of the total volume of products we sell are recycled11.

crawlspace - crawl space design and construction what it looks like when you have a dirt floor underneath the house

Financial support

Government grants and schemes which offer financial support for the installation of floating floor insulation may be available in some countries.

Energy Efficiency, Key, Keyboard, Button


Should I insulate floating floorboards?
What is the thinnest floor insulation?