Insulation Explained
At Cobalt Carbon Free, we believe that home insulation is essential for creating a more comfortable living space. Insulation minimises heat loss through your walls, floors, and roof, helping your home retain warmth for longer. This not only enhances your energy efficiency and reduces energy bills but also ensures that your home remains cosy all year round. Investing in quality insulation makes a significant difference in your comfort and energy savings.​​​​
External Wall Insulation (EWI)
Keep the heat in. Keep the bills down.
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External Wall Insulation adds a high-performance layer to the outside of your home, helping to reduce heat loss and improve energy efficiency.
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Ideal for solid wall homes (especially pre-1920s properties), EWI can:
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Lower energy bills
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Improve year-round comfort
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Reduce your carbon footprint
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A smarter way to upgrade older homes for modern living.
Internal Wall Insulation (IWI)
Internal Wall Insulation (IWI) works by adding insulation to the interior walls of your home, helping to retain heat and enhance energy efficiency. It’s an ideal solution for properties with solid walls, especially when you want to preserve the home’s original external features.
Roofing/Loft
Around 25% of a home's heat escapes through an uninsulated roof, making roof or loft insulation an excellent way to boost energy efficiency and reduce bills. The method of insulation depends on how the space is used—over joists for storage or between and over rafters for living spaces. For hard-to-reach lofts or flat roofs, a "warm roof" method may be applied externally. Other factors, such as ventilation, damp issues, and water pipes, must also be considered when insulating a roof.
Floor
Floor insulation is essential for improving your home’s energy efficiency by minimising heat loss through the ground. Installing insulation beneath the floorboards or within the subfloor helps keep your home warm in winter and cool in summer, resulting in a more comfortable living environment. This type of insulation is particularly beneficial for homes with suspended floors, as it prevents draughts of cold air from entering and enhances overall thermal performance.
Is Your Home Losing Heat and Wasting Money?
Does your home feel cold and drafty, no matter how high you turn up the heating? You could be losing valuable heat—and money—straight through your walls and roof. It’s a common problem, but the solution can be simpler than you think.
Our free, downloadable "Top Tips: Why Insulate?" guide breaks down the top 10 benefits of a well-insulated home. You’ll learn how it can drastically reduce your energy bills , lower your carbon footprint , and even improve your family's health.​
Why Choose Us?
We're committed to providing the highest quality insulation services with unmatched expertise and customer care
Fully Insured & Certified
All our installers are fully certified and insured for your peace of mind
Fully Managed, Start to Finish
We manage every stage of your insulation project - so you only deal with one trusted team
Save Up To 40% On Bills
Reduce your energy costs significantly with professional insulation
25 Year Guarantee
Industry-leading warranty on all our insulation work
5-Star Rated Service
Over 500+ satisfied customers across the UK
Expert Team
20+ years combined experience in insulation installation
External wall insulation is a big investment, so I did a lot of research before deciding on Cobalt Carbon Free. I had the work done just over a year ago, and it’s been the best investment I’ve made on our house. Since then we’ve been through a winter and a summer, and it’s been like living in a different house. The temperature has been so much more stable. In the winter the house heats up so much faster, and holds the heat for a long time. And it has also stayed much cooler in the summer. And all our damp and mould issues have disappeared!
For anyone who has a house without a cavity wall, I would strongly suggest you get external wall insulation. And I’d highly recommend Cobalt Carbon Free to do that work.
Tim Nash, Nottingham
