Source: The Conversation – UK
The UK has some of the oldest houses in Europe. Half of the homes in England are rated below band C on energy performance certificates. This measure rates a property’s energy efficiency from A (most efficient) to G (least efficient), indicating potential energy costs and environmental consequences.
To reduce carbon emissions and energy costs, various quick-fix solutions are being considered.
The UK warm homes plan and the future homes standard aim to speed up the use of low‑carbon technologies like heat pumps, solar panels and batteries. These can cut bills and improve comfort by using efficient electric heating instead of gas or oil. However, rolling them out quickly without planning for repair, reuse and recycling could create waste when they reach the end of their life.
These quick-fix solutions are not enough. We need long-term plans that take the whole life cycle of materials and tech into account. Our research shows the importance of considering the effect of materials from extraction to end-of-life disposal and highlights the need to facilitate reuse.
Huge improvements need to be made to housing, both in terms of improving building fabric and upgrading equipment. Solar panels and home batteries are not designed to be repaired. Heat pumps quickly become outdated and need upgrades. Without a comprehensive plan of action, this new energy tech could soon end up as electronic waste with nowhere to go.
Worsened by gaps between consumer expectations, legislation and access to affordable repair services, information and spare parts, the technologies may have a shorter life. The rapid rollout of these technologies also increases the UK’s reliance on imports and increasing exposure to supply chain fragility and resource scarcity.
To develop homes that are truly fit for the future, the full environmental consequences of the materials and technologies must be considered. That includes how products are designed, manufactured, transported, installed, maintained and eventually discarded.
In response, some homeowners might take a pragmatic approach. Others might consider a detailed analysis of all retrofit solutions.
With incentives, the pragmatist homeowner will take advantage of the government’s subsidies and do some improvements on their house straight away.
Jozef Sowa/Shutterstock
For homeowners more willing to understand the wider problem, they might ask a consultant to tell them what their house is made of and present possible retrofit solutions. This can include tackling major heat loss, draughts, condensation, moisture, material degradation and damage. The realist homeowner may consider the balance between retrofit costs and future energy bills. They may consider different materials, where they come from, how much energy is used to make them.
It takes time for homeowners to gain a clear enough understanding of the retrofit technology and strategies their home needs. By the time they do make decisions, it might then be too late to take advantage of government subsidies or grants. In the meantime, other homeowners might leave any broken equipment in the backyard, then quickly just buy new, more efficient replacements. Unfortunately, neither of these strategies will help meet net-zero targets.
Retrofits and repairs
Retrofit solutions need to prioritise the use of renewable, sustainable materials that minimise the consequences of resource consumption and pollution, alongside technologies that can be repaired and reused.
Beyond homeowners, policymakers need to consider the wider green energy supply chain before rapid rollout to avoid replacing one problem with another by turning our houses into skips with life expired technologies. To upgrade the UK housing stock, reduce resource consumption and energy bills, five things need to change.
Before an intervention, all houses need an energy performance certificate. This supports informed retrofit decisions and provides standard solutions according to the building fabric and specific housing design.
Prioritising passive interventions – like external shading, cross ventilation using windows to allow air to flow naturally through a building and using sustainable materials – would avoid extreme indoor temperatures and reduce energy demand to heat and cool our homes.
Existing buildings could be given building passports to record the retrofit strategies. These can include a description of building fabric, type of materials installed, maintenance required and monitor building performance (energy consumption).
Collective retrofit approaches need further support. These would include district heating (a network that channels excess or waste heat from power stations or other industrial sources to homes and businesses, usually in dense urban areas where people live close to large sources of heat). It could also involve switching to community or district energy consumption targets, collective insulation and building fabric upgrades.
Right to repair laws and broader circular economy initiatives can help reduce electronic waste (such as old solar panels) and encourage sustainable consumption. Better training for local installers and engineers will enable them to more efficiently service and maintain these technologies.
Most UK homes are similar, so shared data can guide better upgrades. With strong leadership and evidence-based retrofit solutions, homeowners can improve their homes without wasting materials or harming the planet.
Ana Rute Costa is affiliated with COST Action CA21103 CircularB: Implementation of Circular Economy in the Built Environment.
Moses Itanola is affiliated with COST Action CA21103 CircularB: Implementation of Circular Economy in the Built Environment.
Philip Griffiths is affiliated with COST Action CA21103 CircularB: Implementation of Circular Economy in the Built Environment.
Original source: https://analysis1.mil-osi.com/2026/07/08/homes-need-more-renewable-energy-tech-heres-how-to-make-sure-retrofits-avoid-creating-e-waste/