Retrofit Underfloor Heating


Retrofit underfloor heating has gained significant popularity as a cost-effective and efficient solution for enhancing the energy efficiency of buildings.

Retrofit Underfloor Heating

In Energy Efficiency Measures, Retrofit by Robert Wheeler / 8 May 2024 / 0 comments

Retrofit Underfloor Heating

Retrofit underfloor heating has gained significant popularity as a cost-effective and efficient solution for enhancing the comfort and energy efficiency of existing buildings. Unlike traditional radiator systems, underfloor heating distributes warmth evenly across the floor, providing a comfortable and cozy environment.

This blog post explores the benefits, considerations, installation process, maintenance tips, and cost analysis of retrofitting underfloor heating. Whether you are a homeowner looking to upgrade your heating system or a building professional seeking to offer this service, this comprehensive guide will equip you with the necessary knowledge to make informed decisions and ensure successful retrofit underfloor heating projects.

Introduction to Retrofit Underfloor Heating

What is Retrofit Underfloor Heating?

Retrofit underfloor heating is a brilliant solution for those wanting to upgrade their home’s heating system without the hassle of replacing existing floors. It involves installing underfloor heating pipes or mats into an already constructed space, making it a popular choice for renovations or home improvement projects.

Advantages of Retrofitting Underfloor Heating

Retrofitting underfloor heating comes with a range of benefits that make it an enticing option for homeowners. Firstly, it provides enhanced comfort by evenly distributing heat throughout the floor, resulting in a warm and cozy living space. Secondly, it can significantly improve energy efficiency by efficiently heating the room and reducing heat loss. Additionally, retrofit underfloor heating eliminates the need for bulky radiators, creating more space and allowing for more creative interior design options.

Benefits of Retrofit Underfloor Heating

Enhanced Energy Efficiency

Retrofit underfloor heating systems are designed to operate at lower water temperatures compared to traditional radiators. This lower operating temperature significantly reduces energy consumption and, subsequently, your heating bills. By using radiant heat, underfloor heating warms up the room from the floor upwards, ensuring heat is distributed evenly without creating temperature variances in the space.

Improved Comfort and Air Quality

One of the greatest advantages of retrofit underfloor heating is the luxurious comfort it provides. Say goodbye to cold feet and hello to toasty warmth underfoot. Additionally, underfloor heating eliminates the problem of cold spots and uneven heating common with radiators, making your living space more comfortable overall. Moreover, it helps reduce the circulation of dust and allergens present in the air, leading to improved indoor air quality.

Space-saving and Aesthetic Advantages

Radiators can often be bulky and limit furniture placement. Retrofitting underfloor heating frees up valuable wall space, allowing for more flexibility in room layout and décor. With no radiators to work around, you can maximize the use of space and create a more aesthetically pleasing environment. Whether you have a modern, minimalist design or love traditional aesthetics, underfloor heating offers a seamless heating solution without compromising on style.

Considerations before Installing Retrofit Underfloor Heating

Evaluating Existing Flooring and Subfloor

Before diving into retrofit underfloor heating, it’s important to assess the suitability of your existing flooring and subfloor. While retrofit systems can work with various floor types, it’s essential to consider factors such as insulation properties, thickness, and stability. Some flooring materials may require additional insulation layers or adjustments to ensure optimal performance.

Assessing Structural Integrity and Load Capacity

Underfloor heating systems add weight to the floor, so it’s crucial to assess the floor’s structural integrity and load capacity. Consult with a structural engineer or building professional to ensure that your floor can support the additional load without compromising safety or causing structural damage.

Determining Compatibility with Existing Heating System

Before proceeding with retrofit underfloor heating, it’s important to assess compatibility with your existing heating system. Consider factors such as the heat source, heat output, and water temperature settings. Retrofit systems can often work in conjunction with various heating systems, including gas boilers, heat pumps, or electric systems, but it’s essential to ensure they can work seamlessly together.

Step-by-Step Guide for Retrofitting Underfloor Heating

Pre-installation Preparation

Start by thoroughly cleaning the existing floor and removing any debris. Ensure that the subfloor is level and in good condition. If necessary, make any repairs or adjustments to ensure a smooth and stable surface for the underfloor heating system.

Choosing the Right Underfloor Heating System

Select a retrofit underfloor heating system that suits your requirements and existing floor type. This can range from pipe systems that involve embedding pipes into the floor screed to electric mat systems that can be installed directly under the flooring. Consult with professionals or experts to determine the best system for your specific needs.

Installation Process

Follow the manufacturer’s instructions and guidelines for installing the underfloor heating system. This typically involves laying the pipes or mats evenly across the floor surface and connecting them to a manifold for water-based systems. Electric systems often involve securing the mats to the subfloor and connecting them to a thermostat.

Connecting to Existing Heating System

If retrofitting a water-based underfloor heating system, connect the manifold to your existing heating system. This may involve adjusting settings, installing control valves, or connecting pipes. It’s advisable to seek professional assistance for proper integration to ensure optimum performance and efficiency.

With these steps covered, you’re well on your way to enjoying the benefits of retrofit underfloor heating in your home. So sit back, relax, and let the warmth radiate from below, providing you with comfort, energy efficiency, and a stylish living space.

Best Practices for Retrofit Underfloor Heating Installation

Ensuring Proper Insulation

When installing underfloor heating in an existing space, it’s crucial to ensure proper insulation. Without proper insulation, the heat generated by the system can escape downwards instead of heating the room. This not only reduces the efficiency of the system but also increases energy consumption and costs. Make sure to insulate the floor properly by adding a layer of high-quality insulation material, such as foam or foil-backed insulation boards, before installing the underfloor heating.

Correct Placement of Underfloor Heating Pipes or Electric Mats

Proper placement of underfloor heating pipes or electric mats is essential for optimal heat distribution. When retrofitting underfloor heating, consider the layout of the room and strategically place the heating elements to ensure even heat distribution. Avoid placing any heating elements under heavy furniture or kitchen appliances, as this can block the heat flow. Also, ensure that the heating elements are evenly spaced to provide consistent warmth throughout the room.

Precision in Temperature Control and Zoning

To maximize comfort and energy efficiency, precision in temperature control and zoning is key. Retrofit underfloor heating systems often come with individual thermostats for different areas or rooms. Take advantage of this zoning capability by setting different temperatures for different zones based on your preferences and usage patterns. This allows you to save energy by heating only the areas that need it and adjusting temperatures according to specific needs.

Maintenance and Troubleshooting Tips for Retrofit Underfloor Heating Systems

Regular Cleaning and Maintenance

Like any heating system, retrofit underfloor heating requires regular cleaning and maintenance to ensure optimal performance. Vacuum or sweep the floor regularly to remove any debris that may obstruct heat transfer. Inspect the system for any leaks, damaged pipes, or electrical issues. It’s also a good idea to schedule professional maintenance checks to ensure everything is in proper working order.

Troubleshooting Common Issues

Despite being a reliable heating solution, retrofit underfloor heating systems may encounter common issues such as uneven heating, cold spots, or control malfunctions. If you experience any of these problems, first check the thermostat settings and ensure they are properly calibrated. If the issue persists, inspect the pipes or electric mats for any damage or blockages. Additionally, check the insulation under the floor for any gaps or areas of poor coverage that may affect heat retention.

Professional Servicing and Repairs

While some minor troubleshooting can be done by homeowners, it’s important to rely on professional servicing and repairs for more complex issues. If you’re uncertain about how to fix a problem or if the issue persists after your troubleshooting attempts, it’s best to call in a professional. They have the expertise and tools to diagnose and resolve any underlying issues, ensuring your retrofit underfloor heating system operates efficiently and safely.

Cost Analysis and Return on Investment for Retrofit Underfloor Heating

Initial Cost Considerations

Before committing to retrofit underfloor heating, it’s essential to consider the initial costs. Retrofitting may involve additional expenses such as removing existing flooring, installing insulation, and modifying the existing heating system. However, it’s important to weigh these costs against the long-term benefits and potential energy savings that underfloor heating can provide.

Energy Savings and Payback Period

One of the primary advantages of retrofit underfloor heating is its energy efficiency. By heating from the floor up, it allows for more even and consistent warmth, reducing the reliance on traditional heating methods. This can lead to significant energy savings over time. Calculate the payback period by comparing the estimated energy savings with the initial costs to determine how long it will take to recoup the investment.

Long-term Benefits and ROI Calculation

Beyond energy savings, retrofit underfloor heating offers several long-term benefits. It increases comfort levels by eliminating cold spots and reducing reliance on radiators or other heating sources. It can also add value to your home and appeal to potential buyers. To calculate the return on investment, factor in not just the energy savings, but also the improved comfort, potential home value increase, and the longevity of the system.

Case Studies: Successful Retrofit Underfloor Heating Projects

Residential Retrofit Underfloor Heating Project

In a residential retrofit underfloor heating project, a family in a cold climate transformed their chilly kitchen into a cozy space. By installing underfloor heating beneath their existing tile floor, they eliminated the need for additional radiators and improved warmth throughout the room. The precise temperature control allowed them to create a comfortable environment, and they reported energy savings and increased satisfaction with their newly heated kitchen.

Commercial Retrofit Underfloor Heating Project

A commercial retrofit underfloor heating project saw a small office space upgrade to a more efficient and comfortable working environment. By retrofitting underfloor heating, the office no longer had to rely solely on central heating, allowing better control over temperature variations. This change improved employee satisfaction, reduced energy consumption, and demonstrated the office’s commitment to sustainability, impressing clients and visitors alike.


In conclusion, retrofit underfloor heating offers a range of benefits, from improved energy efficiency to enhanced comfort and aesthetics. By following the proper installation procedures, considering important factors before retrofitting, and maintaining the system regularly, you can enjoy the advantages of underfloor heating in your existing space. While the initial investment may vary, the long-term savings and return on investment make retrofit underfloor heating a worthwhile consideration. With the information provided in this article, you can confidently explore the possibilities of retrofitting underfloor heating and transform your space into a comfortable and efficient haven.

Retrofit Underfloor Heating FAQs

Is retrofitting underfloor heating suitable for all types of flooring?

Yes, retrofit underfloor heating can be installed under various types of flooring, including tile, laminate, hardwood, and even carpet. However, it is important to consider the specific requirements and compatibility of the underfloor heating system with your chosen flooring material to ensure optimal performance.

Can I install retrofit underfloor heating in an existing space without major renovations?

Absolutely! Retrofit underfloor heating systems are designed to be installed without extensive renovations. They can be easily incorporated into existing spaces with minimal disruption. However, it is important to evaluate the condition of the subfloor and consider any necessary modifications to accommodate the underfloor heating system.

Will retrofit underfloor heating increase my energy bills?

On the contrary, retrofit underfloor heating can actually help reduce your energy bills. These systems are highly efficient, providing even heat distribution and utilizing lower operating temperatures compared to traditional radiator systems. The improved energy efficiency can lead to significant savings in the long run, offsetting the initial investment.

Can I install retrofit underfloor heating myself, or should I hire a professional?

While retrofitting underfloor heating may seem like a DIY project, it is recommended to hire a professional for the installation process. A trained and experienced installer will have the expertise to assess your specific needs, ensure proper system selection and installation, and provide valuable advice to optimize the performance and longevity of your underfloor heating system.

Latest Posts

  • What is retrofitting in construction?
    Retrofitting in construction is a crucial process that involves upgrading existing buildings or structures to meet modern standards of safety, energy efficiency, and functionality. This blog post explores the concept of retrofitting, its importance, various techniques used in the industry, factors to consider before undertaking a retrofit project, real-world case studies showcasing successful retrofitting endeavours,… Read more: What is retrofitting in construction?
  • What happens to a building during retrofitting?
    Building retrofitting is a vital process that involves making significant modifications and improvements to existing structures to enhance their efficiency, functionality, and sustainability. In this blog post, we will delve into the intricate workings of building retrofitting, exploring the various stages involved and the impact it has on the overall performance of a building. From… Read more: What happens to a building during retrofitting?
  • UK Government Retrofit Scheme: Making Energy Efficiency Cool Again
    Introduction to the UK Government Retrofit Scheme Background of the Retrofit Scheme Picture this: you’re sitting at home, snuggled up in your favourite blanket, enjoying a cup of tea, when suddenly you feel a draft. Not cool, right? Well, that’s exactly how the UK Government feels about energy inefficiency in buildings. The UK Government Retrofit… Read more: UK Government Retrofit Scheme: Making Energy Efficiency Cool Again
  • What are Retrofit Trickle Vents?
    Improving indoor air quality and enhancing energy efficiency are key priorities for many homeowners. In this article, we will explore the concept of retrofit trickle vents and their role in achieving these goals. Trickle vents are small, adjustable openings integrated into windows or doors that allow controlled ventilation without compromising security or energy efficiency. By… Read more: What are Retrofit Trickle Vents?
  • Retrofit Underfloor Heating
    Retrofit underfloor heating has gained significant popularity as a cost-effective and efficient solution for enhancing the comfort and energy efficiency of existing buildings. Unlike traditional radiator systems, underfloor heating distributes warmth evenly across the floor, providing a comfortable and cozy environment. This blog post explores the benefits, considerations, installation process, maintenance tips, and cost analysis… Read more: Retrofit Underfloor Heating
  • What does retrofit include?
    Retrofitting has become a critical aspect of sustainable building practices, offering opportunities to enhance energy efficiency, improve structural integrity, and prolong the lifespan of existing structures. This blog post delves into the comprehensive process of retrofitting, from the initial assessment and planning stages to the execution of energy efficiency upgrades and structural enhancements. Exploring the… Read more: What does retrofit include?
  • What is the most energy efficient ventilation system?
    Ventilation systems play a crucial role in maintaining indoor air quality, comfort, and overall well-being in buildings. However, with the rising concern for environmental sustainability and energy conservation, the focus has shifted towards finding the most energy-efficient ventilation systems. In this blog post, we will explore the significance of energy efficiency in ventilation systems and… Read more: What is the most energy efficient ventilation system?
  • Is retrofit insulation worth it?
    When it comes to optimizing energy efficiency in buildings, retrofit insulation has emerged as a valuable solution. Retrofitting insulation involves upgrading or adding insulation to existing structures, offering a range of benefits such as improved energy efficiency, enhanced comfort, and reduced utility bills. This blog post explores the worthiness of retrofit insulation, delving into its… Read more: Is retrofit insulation worth it?
  • Do energy efficiency measures add value to property?
    As the world grapples with the challenges of climate change and a growing awareness of environmental sustainability, energy efficiency has emerged as a critical consideration in various sectors, including real estate. The concept of energy efficiency, which focuses on reducing energy consumption while maintaining or improving performance, has far-reaching implications for both the environment and… Read more: Do energy efficiency measures add value to property?
  • What is the most energy-efficient lighting option?
    In a world where energy conservation and sustainability are increasingly important, the choice of lighting technology plays a significant role. As traditional incandescent bulbs are being phased out due to their inefficiency, it becomes crucial to explore energy-efficient lighting options that not only reduce energy consumption but also contribute to long-term cost savings. This blog… Read more: What is the most energy-efficient lighting option?

Looks Good As New!

Really happy with the work that Sam and the team at NxtGen Externals did to our home in Chelmsford.

Couldn’t Be Happier!

The guys at NxtGen were professional, clean and thorough in the work they did to our roof.

Very Professional Service

Next Generation Externals provided a very professional service, very efficient. The staff were very friendly and helpful.

CALL 0800 270 7717

Need help with a construction project? Speak to the NXTGEN Futures team today.