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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.

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

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.

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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

Sustainability and energy efficiency

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

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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. 

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FAQs

FAQs

Should you insulate a basement ceiling?

This depends on your ultimate goal. Properly insulating a basement ceiling helps improve energy and thermal efficiency. Using quality material such as stone wool can also reduce sound transfer.

Do basement walls have problems with damp?

Basement walls need special attention to avoid moisture intrusions and damp issues, especially when they are soil-facing. Trapping moisture can cause such problems, as will any cracks or holes in basement walls left unfixed.