Basement Insulation

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Basement insulation can offer an effective solution for heat loss and noise issues in below ground spaces – especially when they are being converted into habitable rooms.

Increasingly, developers and homeowners are noting the potential for underground storage areas to be transformed into:

Spare bedrooms – adding value and creating extra living space.
TV or games rooms – with everything from pool tables to home cinemas.
Reception spaces – featuring kitchens, dining tables or sofas.

Making sure that building and living standards meet and surpass expected requirements is crucial.

Basement walls, floors and ceilings can be insulated to improve thermal performance, tackle the possibility of damp and enhance overall indoor comfort – as well as reducing noise transfer to and from the room.

Read on to learn more about the benefits of insulating these spaces – and how ROCKWOOL stone wool solutions can help.

Find inspiration, guides and reports

Why do we need basement insulation?

Insulation for basements can reduce heat loss in a property, protect against problems with mould and help to create a comfortable living space.

Basements are often the coldest areas of any property, and at greater risk of damp. Effective insulation helps address these concerns – and the overall energy efficiency of the building.

In a new construction, applying insulation to a basement with external walls creates a conditioned space¹. With existing underground or semi-underground basements, internal wall and floor insulation will significantly reduce heat loss.

Ceiling insulation meanwhile can prevent thermal transfer from the room above – or thermal transfer to it if the basement is converted and heated. It can also enhance soundproofing of the space.

Benefits of using ROCKWOOL insulation include²:

Reduced heat loss
Protection against damp
Acoustic absorption
Fire resilience

Relevant resources

Calculator and savings

The size of the basement and the areas you choose to insulate will determine any potential savings.

U-value calculator tools and technical support are commonly available with your local ROCKWOOL organisation. They can help determine the exact product and thickness required to fulfil your requirements.

Your desired basement insulation U-value and/or R-value – and the products required to attain it – can also be calculated at a local level.

Check your local building regulations. The recommended values for wall, floor or ceiling insulation will vary depending on the location, and whether it’s for a new build or extension to a property.

Learn about energy efficiency

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Why choose ROCKWOOL solutions?

Made from stone wool, ROCKWOOL products possess many properties ideal for basement renovations or conversions.

Engineered to repel water, yet allowing water vapour to pass through its structure, stone wool will not be adversely affected by moisture – and will maintain its performance.

Strong acoustic absorption and sound insulation capabilities also reduce sound transfer to or from the space above.

Excellent thermal properties, meanwhile, help maintain a steady temperature throughout the room and wider property.

Various products are available across our different markets, with types of basement insulation ranging from slabs to rolls. Each can be applied to different spaces – offering a solution for any project.

Our applications harness the power of stone, offering such benefits as³:

Water repellence
Sound absorption
Thermal insulation
Fire resilience
Robustness
Circularity⁴

Find ROCKWOOL products

We provide a range of dedicated products for various basement applications, including thermal products to reduce energy bills, products to prevent a fire from spreading – and visually appealing ceiling products that can be placed against the underside of a floor.

Roger Peeters

Global Product Manager, ROCKWOOL Group

Applications

Insulation

Ground to Floor Insulation

ROCKWOOL concrete floor insulation is there to make your building as energy efficient as possible.

Insulation

Ceiling Insulation

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

Insulation

Basement & Cellar Ceiling Insulation

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

Insulation

Basement Wall Insulation

Basement wall insulation can protect soil-facing walls from heat loss, damp and moisture.

Installation

ROCKWOOL basement insulation products can be used to insulate the floor, walls and/or ceiling.

The appropriate product and method will depend on the size and shape of your space and the main focus – such as thermal maintenance, damp prevention or sound proofing.

Key tips

Insulate existing walls – Consider building stud wall a for interior wall insulation in an existing basement. External basement walls can only be insulated during construction due to accessibility issues.
Damp prevention – The choice of insulation solution is important for damp prevention, particularly in the basement. Make sure any cracks and holes in walls, ceilings and floors are fixed before installing.
Sound proofing existing walls and ceilings – Effective insulation can reduce sound transfer to and from adjacent rooms.

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

ROCKWOOL products are made from stone wool – a highly sustainable material forged from volcanic rock⁵.

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Our materials are reusable and recyclable, forming a circularity for all our solutions.

From basement slab insulation to boards and rolls, each product aims to improve the energy efficiency of the room and wider building. Reducing heating bills is one positive impact of this, alongside the larger environmental effect.

Our products help properties work towards international standards, including:

No thermal bridging
Quality insulation

8 facts about the circularity of stone wool

Downloads and resources

Thought Leadership

Benefits of home improvement

During home renovation, upgrading what’s inside your walls can make the biggest difference of all.

By Vincci Morales

Energy Efficiency

Wellbeing

Quality of life

5 questions you should ask when buying a new house

Discover crucial tips for buying a newly built house.

By Vincci Morales

Energy Efficiency

5 Ways to save energy at home

Are you frustrated over the rising cost of your energy bill? Or maybe you just want to do your part for the environment? Read our 5 ways to save energy at home.

By Susanne Dyrbøl

Renovation

Energy Efficiency

An energy transition cannot happen without the renovation of buildings

Without re-thinking the current effort we will not be able to deliver the scale of high-quality renovation which is required to deliver the energy transition.

By Jan Simonsen

Renovation

Energy Efficiency

Worry about cost but remember the long-term view

The immediate finances that come with any renovation can be misleading. See how they help in the long run.

Financial support

Depending on your location and the type of basement conversion or renovation being undertaken, you may be eligible for financial support from your local government.

Find your local ROCKWOOL office