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‘Homes with poor insulation experience annual increase of £415’

As the chill of winter approaches, the reality of rising energy costs becomes more apparent, especially for those living in poorly insulated homes. Under the latest price cap set by Ofgem, effective from 1 January 2024, households with poor insulation are facing a stark increase in their annual energy bills. Ofgem reviews the price cap every 3 months due to the market fluctuating. This upcoming increase is attributed to the rise in costs and the conflict in the Middle East. However, poorly insulated homes will suffer the most from the cold weather and significantly higher bills.

Impact of poor insulation

The ramifications of poor insulation in homes extend far beyond discomfort. As per the recent analysis by the Energy and Climate Intelligence Unit (ECIU), homes with substandard insulation (rated band F on the Energy Performance Certificate scale) are not just facing incremental increases in heating costs, but a significant financial burden. When gas and electricity costs are accounted for, these least energy-efficient homes could see their bills surge by around £730 (42%) annually compared to homes rated at EPC band C, the government’s desired energy efficiency level. This staggering figure highlights the acute impact of insulation, or the lack thereof, on household expenses.

This stark increase is set against the backdrop of Ofgem’s January price cap. The ECIU’s projections are particularly alarming when considering the broader economic context. The gas crisis, coupled with escalating power prices, has been particularly harsh on homes with lower energy efficiency ratings. For instance, even households with an average energy efficiency rating (EPC band D) are projected to face bills approximately £280 higher than if they met the government’s target of EPC band C.

The impact of poor insulation is thus a multifaceted issue. It’s not just a matter of increased financial strain but also speaks to the broader narrative of energy efficiency, sustainability, and the need for proactive measures in upgrading housing standards across the country. The situation calls for a concerted effort to improve home insulation, which could significantly mitigate these financial and environmental pressures.

External wall insulation as the solution

External wall insulation emerges as a potent solution to the escalating energy costs associated with poor insulation. This method involves affixing a layer of insulation material to the external walls of a building, effectively creating a thermal barrier. The benefits are immediate and substantial: it significantly reduces heat loss during colder months and prevents excess heat during warmer periods, thereby stabilising indoor temperatures.

The installation of external wall insulation can lead to substantial energy savings. By enhancing the thermal efficiency of a building, it reduces the need for excessive heating or cooling, thus directly cutting down on energy consumption. This decrease in energy usage not only translates to lower energy bills but also contributes to reducing the overall demand on the energy grid.

Moreover, external wall insulation also contributes to a home’s overall aesthetic and structural integrity. It can provide a facelift to older buildings, potentially increasing property value, and offering additional protection to the exterior of the house. Soundproofing is another added benefit, as these insulation layers can dampen external noise, creating a more peaceful living environment.

From an environmental standpoint, the reduction in energy consumption also means a significant decrease in carbon emissions, aligning with broader goals of environmental sustainability and climate change mitigation. In essence, external wall insulation stands as a comprehensive solution, addressing economic, environmental, and quality of life issues simultaneously.

Economic and environmental benefits of improving poor insulation

The economic and environmental benefits of external wall insulation are profound and far-reaching. Economically, the most immediate impact is the reduction in energy bills. By enhancing a building’s thermal efficiency, external wall insulation significantly lowers the amount of energy required for heating and cooling, directly translating into financial savings for homeowners. These savings are particularly relevant in the context of rising energy prices, offering a buffer against fluctuating costs.

Environmentally, external wall insulation contributes to reducing a household’s carbon footprint. By decreasing energy consumption, it cuts down on the greenhouse gas emissions associated with electricity and gas usage. This reduction is vital in the fight against climate change, as residential energy use is a significant contributor to global emissions.

Furthermore, by lessening the dependency on energy grids, external wall insulation can alleviate the pressure on energy resources, promoting a more sustainable and environmentally friendly approach to energy consumption. This shift is not only beneficial for individual households but also for the broader community, as it supports national and global efforts to transition towards more sustainable energy systems.

Government support and prospects

The UK government has recognised the importance of insulation in combatting energy inefficiency and high utility costs. Several schemes have been initiated to support homeowners in this endeavour.

The Great British Insulation Scheme

A key initiative is the Great British Insulation Scheme, which aims to assist people in insulating their homes to enhance energy efficiency and reduce energy costs. Launched in the summer of 2023 and running until March 2026, this scheme, previously known as ECO+, is backed by £1 billion in funding. It targets around 300,000 households, offering financial assistance for installing new home insulation, potentially saving consumers around £300 to £400 annually on their bills​.

The scheme is particularly focused on helping those on lower incomes and extends support to households living in the least energy-efficient homes (rated D or below on the Energy Performance Certificate) and in lower Council Tax bands (A-D in England, A-E in Scotland and Wales). This broadened scope ensures more people, especially those struggling with energy bills, can access the benefits of enhanced energy efficiency​.

How the scheme operates

The Great British Insulation Scheme obligates energy suppliers to assist customers in reducing their heating bills through the installation of energy efficiency measures like loft and cavity wall insulation. Depending on the specific measures and property conditions, the cost of insulation may be entirely covered by the scheme, or offered at a subsidised rate​.

Eligibility can be checked through the GOV.UK website, participating energy suppliers, or local authorities. Eligible households will be contacted to arrange a survey of their home and organise the installation​.

The Energy Company Obligation (ECO)

Another significant programme is the Energy Company Obligation (ECO), which has been operational since 2013. This scheme has delivered approximately 3.5 million measures in around 2.4 million properties, benefiting about 9% of households in Great Britain. The current iteration, ECO4, is expected to deliver energy efficiency measures to an estimated 450,000 low-income and vulnerable households, complementing the efforts of the Great British Insulation Scheme​.

Looking ahead

These schemes represent a vital step forward in the UK’s commitment to improving energy efficiency in homes. The economic benefits of such schemes are clear, with the potential for significant annual savings on energy bills for households. Environmentally, these initiatives contribute to reducing carbon emissions, aligning with global sustainability goals.

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2 thoughts on “‘Homes with poor insulation experience annual increase of £415’

    1. Hi Steve, it depends on what type of insulation you’re installing. Ultimately, you’re trying to achieve a U-value of 0.30 in retrofits, for which you’ll require 60mm of K5, 90mm of EPS, and 110mm of Mineral Wool.

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