A poor Energy Performance Certificate (EPC) rating can reduce the value of your property, make it harder to rent or sell, and result in non-compliance with legal requirements. At Urgent EPC, we believe that understanding what leads to a bad EPC score is the first step to improving it. Here are the main causes:
1. Lack of Insulation
One of the most significant contributors to a low EPC rating is insufficient insulation. Homes without loft, cavity wall, or floor insulation lose heat rapidly, which increases energy usage. Find out how residential EPC assessments can highlight these issues.
2. Inefficient Heating Systems
Outdated or inefficient boilers, electric storage heaters, or lack of proper thermostatic controls can severely impact your energy efficiency rating. Modern heating solutions are essential to achieving a better EPC score.
3. Single-Glazed or Poor-Quality Windows
Properties with single-glazed windows or windows in poor condition allow significant heat loss, contributing to a lower EPC grade.
4. Outdated Lighting
Using halogen or incandescent light bulbs instead of LED alternatives consumes more electricity, negatively affecting your energy performance rating.
5. Old Appliances
Homes filled with non-energy-rated appliances—like old washing machines, fridges, or ovens—consume more power and drag down EPC ratings.
6. No Renewable Energy Sources
EPC ratings now factor in renewable systems such as solar panels or heat pumps. Not having these can impact your property’s potential score.
7. Unsealed Draughts and Poor Ventilation
Gaps around doors, windows, or poorly insulated pipework create cold draughts and inefficiency. These small but cumulative issues hurt your EPC score.
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