Intermediate Floor Insulation

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Intermediate Floor Insulation

Sound and heat can easily transfer between rooms and dwellings in the same building through separating floors. Whether in a block of commercial offices or residential apartments, this often creates unwanted noise pollution and increased energy consumption¹.

Intermediate floor insulation is designed to tackle this directly by improving acoustic properties while reducing thermal transmission and energy use. It can prevent heat from penetrating through to upper levels, and also improve the fire resistance of structures too.

In both residential and commercial properties, this helps create a much more comfortable living and working environment for occupants and tenants.

Learn more about the benefits of separating floor insulation, ROCKWOOL products, and our installation methods today.

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Why do we need intermediate floor insulation?

Insulating separating floors is important in any building to protect neighbours from unwanted noise – and fire risks. Usually these are wooden structures, where insulation is placed between the load-bearing beams or, in case of a solid concrete floor, fixed against the underside.

Intermediate floor insulation adds an extra layer of protection to safeguard dwellings and offices against sound transmission and the spread of fire, ensuring they are compliant with local fire safety building regulations).

It also provides thermal resistance, which can help thermal transmission within spaces and keep cool air where it’s needed in warm climates.

This insulation can be applied to both new buildings and renovations.

Key benefits include:

Improved fire safety
Enhanced acoustic absorption
Reduced cooling costs

Relevant resources

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Calculator and savings

The amount of separating floor insulation required depends on the size of the surface where it is to be applied, as well as the structure of the floor itself.

Whether it is a concrete or wooden floor will affect the amount of insulation material you need. Some products also have a flexible edge, reducing material loss when cutting down to size to install insulation between floor joists.

Thermal resistance properties can result in energy savings by creating a consistently heated or cooled environment – reducing the need to expend energy on additional heating or air conditioning.

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.

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FLOOR BATTS I, package, product, slabs, HVAC, Process industry, acoustics, Floors

Why choose ROCKWOOL solutions?

We offer a wide variety of products meeting many different requirements for effective mid floor insulation.

These can be applied to both wooden and concrete separating floors using a range of methods, improving the acoustic absorption and fire resilience between floors.

ROCKWOOL products are usually low to medium mono density slabs or rolls. Slabs can include a flexible edge to improve fitting properties and performance when placed in between the wooden beams of a floor.

Made with extremely high-quality stone wool, all ROCKWOOL insulation improves thermal resistance, helping reduce energy consumption while contributing to a comfortable, efficient and cost-effective living environment.

Benefits of ROCKWOOL insulation include²:

Fire resilience
Acoustic blocking
Robustness
Circularity

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ROCKWOOL intermediate floor insulation is easy to install between beams, offering high sound reduction and absorption – as well as protecting wooden beams against the risk of fire.

Roger Peeters

ROCKWOOL Group Product Manager

Case studies

The challenge

An iconic Malaysian landmark, the Petronas Twin Towers are the tallest twin structure in existence – and were constructed in 1996 to symbolise the nation’s forward-thinking optimism. A project of this scale needed to follow rigorous safety standards.

The solution

Huge importance was understandably placed on the fire resilience of the towers. ROCKWOOL products’ fire resistant and thermal properties made them an ideal choice to meet key requirements. The Towers’ curtain wall system was built and tested to guarantee two-hour fire resistance, while 900 tonnes of stone wool were installed across the floors, ceilings and walls of both towers.

The results

Our insulation helps keep the buildings’ thousands of occupants safe from the risk of fire. It also improves thermal performance – reducing energy consumption for air conditioning in a city where temperatures remain around 30°C all year – while enhancing acoustic performance and reducing sound transmission between dwellings.

Find more case studies

Petronas Twin Towers, Fire-Resilience, night

Thanks to our product portfolio and our continuous R&D efforts, we are in a privileged position to…enrich the lives of people and cities such as Kuala Lumpur.

Jeff Wilcox

ROCKWOOL South Asia Managing Director

Applications

Insulation

Floating Floor Insulation | ROCKWOOL Asia

ROCKWOOL floating floor insulation boards can transform the thermal and acoustic performance of ground, separating and intermediate floors.

Insulation

Ceiling Insulation | ROCKWOOL Asia

Effective ceiling insulation helps to retain heat and absorb sound between separating floors.

Insulation

Basement & Cellar Ceiling Insulation | ROCKWOOL Asia

Basement & cellar ceiling insulation can improve the liveability of converted below ground spaces.

Installation

You can install intermediate floor insulation in both new build and renovation projects, using light to medium-weight slabs and rolls. A variety of products are easily applicable in the low to mid density range.

Wooden floor – Place the chosen product between the floor beams. In certain cases, granulate can be used.
Concrete floor – Install against the underside of a concrete floor. Use regular, available mechanical fixings or cement glue for long-lasting adhesion.

Insulation rolls can be cut to size or even produced at a width that fits perfectly between floor beams, while slabs are available with or without a flexible edge for friction fitting.

Key tips:

Choose the best product – Products with flexible edges are easily installed, but if cutting is required, ensure you have extra width.
Remember aesthetics – For concrete floors especially, a mechanical fixing or glued application can affect the aesthetics of the room, so it can be common to apply a lowered ceiling for visual perfection.
Consider the floor beams – If granulate is used to fill in between the wooden floor beams, this requires tiny holes in the construction to enable proper installation.

Inspiration and guides for professionals

Get 16 Renovation Cases

This case study bundle includes:

29 pages of our best 2018-19 projects
Acoustic renovation in both public buildings and private
Bringing new life into old buildings with facade panels
Improving fire safety and wellbeing in high-rises and historical buildings
Reducing noise and flooding with innovative stone wool solutions

Sustainability and energy efficiency

All of our ROCKWOOL separating floor insulation products are fully recyclable. They are made from one of the most abundant natural materials around – stone³.

Mid floor insulation is designed to last the lifetime of a building, whether it’s installed in a brand-new property or used to renovate an existing one.

It also provides thermal benefits to help promote indoor comfort, and meet modern Passive House standards⁴.

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