‘Retrofitting of buildings is the targeted control of energy loss in domestic buildings via qualitative or quantitative assessment.’
Did you know that any home built before 1990 is considered an old building and is therefore thermally inefficient?
What are the benefits of energy efficient retrofits?
The construction world has been talking about retrofitting for energy efficiency for decades, but the subject is becoming more frequently discussed as the issue of climate change becomes more desperate.
Much of the housing stock in the UK is losing heat through poor glazing, uninsulated walls and lofts, and draughts in all kinds of places. All of these push your energy bills skywards together with old heating systems. Energy inefficiency not only leads to heat loss but also contributes to increased carbon emissions, making homes a significant part of the climate crisis.
Now not everyone has huge amounts available to pay on a deep retrofit. However, the great thing with a retrofit project is that a phased, cost-effective energy-saving plan can be designed to guide you on how to update your home most effectively and reduce carbon output while improving comfort.
Retrofitting of buildings – how and when do you do it?
Retrofitting for energy efficiency refers to the renovation or refurbishment of an existing building where the opportunity is taken to improve the energy performance of a structure by incorporating new high-performing materials.
Retrofitting of buildings looks at modifications to existing structures that enhance energy efficiency and reduce the property’s overall demand for heating and power.
We always start with a fabric first approach, then the services and lastly consider renewables. This is the correct practical approach and offers the best value to our clients.
Getting retrofit right is a complicated business, but this is when Eco Tiffin can help as we are qualified Retrofit Coordinators and understand the complicated calculations. You’ll hear us talking about thermal conductivity, U-values, thermal bridges, space heating, airtightness, and so much more. You could be losing a lot of energy and consequently heat, but first, establish where this is occurring. Before a retrofit commences, we advise clients to carry out an energy assessment (qualitative or quantitative) as this gives greater insight and provides more accurate data for us to suggest the best measures.
However, some clients don’t like to go into so much detail and are happy to look at the more obvious practical steps such as insulation and draught-proofing, controlled ventilation and a modern heating system (qualitative). This method is also acceptable as every home is different, and each depends on individual requirements, so we must listen to our clients and provide the correct solutions for the age of the property, its occupancy and usage to maximise benefit and added value.
Retrofitting for energy efficiency can reduce a typical UK home’s energy use by up to 60% when done comprehensively, according to recent figures from the Energy Saving Trust. Payback times can vary from 3–10 years depending on the measures installed, with loft insulation, draught-proofing and LED lighting offering some of the fastest returns.
In addition to cost savings, retrofitting buildings is crucial to achieving the UK’s net zero targets. By improving airtightness and reducing thermal bridging, homes require less energy for heating and cooling, leading to fewer carbon emissions.
Retrofitting can also improve indoor air quality, reduce damp and mould, and create a more comfortable living environment — especially when paired with mechanical ventilation systems.
Retrofitting for energy efficiency can be undertaken at any time, but it often works out more cost-effective to do it when carrying out other refurbishments, extension works, or repair and maintenance jobs. We will always recommend this approach to minimise disruption and achieve better value for money.
What are the most popular ways of retrofitting for energy efficiency?
The primary goal of retrofitting is to make a home more energy-efficient by improving how it retains heat, how it is ventilated, and how energy is used. Popular measures include:
- Loft insulation to reduce heat loss through the roof.
- Cavity wall insulation for homes with cavity construction.
- Solid wall insulation (external or internal) for older buildings.
- Air source heat pumps as a low-carbon alternative to gas boilers.
- Triple-glazed or high-performance double-glazed windows.
- Draught-proofing for windows, doors, and floors.
- MVHR (Mechanical Ventilation with Heat Recovery) systems to maintain indoor air quality efficiently.
- Smart thermostats and zoning controls to optimise heating.
Retrofitting can be phased to suit your budget, starting with low-cost, high-impact changes like insulation and air sealing.
How much money can I save by retrofitting my home?
The savings depend on your property’s current condition, energy usage, and the improvements made. Average savings may include:
- £250–£300/year from adding or upgrading loft insulation.
- £400–£600/year from wall insulation (depending on type).
- £500+ annually from replacing an old boiler with an air source heat pump, particularly when combined with insulation and controls.
Over a 10–15 year period, many retrofit measures pay for themselves while increasing home comfort and resilience.
Does retrofitting add value to my property?
Yes. Improving a home’s EPC (Energy Performance Certificate) rating can enhance its marketability and resale value. Buyers increasingly seek energy-efficient homes due to rising energy costs and environmental awareness.
Retrofitting can also reduce damp and maintenance issues, adding further value in the long term.
Can retrofitting be done in listed or period properties?
It can, but it requires expertise. Older and listed buildings often use breathable materials like lime plaster and natural stone. Inappropriate retrofits (e.g., cement render or non-breathable insulation) can trap moisture and cause damage.
Eco Tiffin specialises in sensitive, conservation-led retrofit strategies using natural, breathable materials that maintain the building’s character while improving performance.
Is planning permission needed for energy retrofit works?
It depends on the measures and property type. Most energy improvements (like internal insulation or boiler upgrades) don’t need planning permission. However, for external changes (e.g., external wall insulation, solar panels) — particularly in listed or conservation area buildings — consent is often required. Always check with your local authority.
What are the first steps to retrofitting an older home?
Start with a professional building survey or home energy assessment. This helps identify problem areas and plan improvements in the correct sequence. For example, insulating before resolving damp or poor ventilation can make problems worse. A fabric-first approach — improving the structure and insulation — is usually the best foundation before adding tech like heat pumps or solar panels.
How long does a retrofit project typically take?
Timelines vary. Smaller upgrades like draught-proofing or insulation might take a few days, while comprehensive deep retrofits — especially in older buildings — can take several weeks or months. The duration depends on property size, access, and the scope of works.
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