by Jason Ratcliffe
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04 Feb, 2023
The restrictions that are associated with EPC ratings vary from country to country and can include minimum energy efficiency requirements, maximum allowable carbon emissions, and other environmental sustainability standards. EPC ratings are used to measure the energy efficiency of residential buildings. The rating system assigns a number between 0 and 100, with higher numbers indicating better energy performance. Buildings that score 80 or above are considered “high-performance” and those that score 55 or below are considered “low-performance”. The restrictions associated with EPC ratings can include minimum requirements for insulation, air tightness, window glazing and ventilation systems as well as maximum levels for carbon emissions from heating systems. Depending on the country in which the building is located, there may also be additional requirements such as water conservation measures or renewable energy sources. These regulations help ensure that residential buildings meet certain standards of environmental sustainability while also providing an efficient living environment for occupants. In addition to the rating system, EPC ratings can also be used as part of a financial incentive scheme. For example, in some countries, buildings with high EPC ratings may be eligible for tax incentives or other financial benefits such as reduced energy bills. This helps encourage people to invest in more efficient and sustainable properties that have lower running costs over time. In summary, EPC ratings are used to measure the energy efficiency of residential buildings and can be accompanied by restrictions in order to ensure that the building meets certain standards of environmental sustainability. The rating system is also often used as part of a financial incentive scheme, offering tax benefits or reduced energy bills for those who invest in high-performance properties. Although, EPC ratings can work well with more modern properties that have double or triple glazing throughout and cavity walls, it can become more complicated and less accurate when more complex buildings are rated. Such issues can arise with buildings that have been heavily extended, with multiple construction types, window types, and heating types. Therefore, this relies on the EPC Assessor being experienced to be able to ensure such variations are accurately accounted for. Listed buildings, or buildings within a conservation area/ Area of Natural Outstanding Beauty also may have restrictions on the types of improvements that are possible, causing possible limitations to the improvements that are feasible. When purchasing such a property this should be considered as this will inevitably cause higher energy bills to be expected to heat and cool the property. Also, the recommendations to improve the home that are included within an EPC Certificate do not account for the type of property it is related to. Meaning, that not all recommendations are going to necessarily be appropriate for the type of construction and may cause more harm than good. For example, a cob construction requires a level of moisture to be retained to ensure the structure remains sound, however, as part of the energy improvements this may advise having external wall insulation and cladding, which on such a building increases the risk of excessive drying out and possible structural weakening to the building. If your home is not of standard, modern construction it would be worth seeking specialist advice prior to undertaking any works to check the viability of the improvements based on the location, possible listing and type of construction, to prevent a possibly escalating issue being caused.