If your property has failed or received a poor Energy Performance Certificate (EPC) rating, you’re not alone. Many homeowners and landlords are surprised by low scores, especially with the UK’s increasing focus on energy efficiency standards. Understanding the reasons behind a poor EPC score and how to fix them is key to improving your rating and complying with regulations.

🔎 Why Properties Fail the EPC Test

1. Poor Insulation
Lack of insulation in walls, lofts, and floors is one of the biggest culprits. Without sufficient insulation, heat escapes easily, reducing the building’s thermal efficiency.

2. Single Glazing
Older windows without double or triple glazing allow heat to escape and can significantly drag down your rating.

3. Inefficient Heating Systems
Outdated boilers, inefficient radiators, or lack of central heating can all lead to poor EPC scores.

4. Lighting
Using traditional incandescent or halogen bulbs instead of energy-efficient LED lighting can negatively impact your EPC rating.

5. No or Low-Rated Renewable Technologies
Buildings without solar panels or other renewable energy features may struggle to achieve high scores in the A-C range.

🛠️ Fixes to Improve Your EPC Rating

1. Upgrade Insulation
Add cavity wall, floor, and loft insulation. Grants may be available to assist with the costs.

2. Replace Windows
Install double or triple-glazed windows to improve thermal efficiency and comfort.

3. Install a Modern Boiler
Replace your old boiler with a modern condensing boiler and install smart heating controls.

4. Switch to LED Lighting
Replace all bulbs with energy-saving LEDs — it’s a low-cost improvement with a noticeable rating impact.

5. Consider Renewable Energy
Installing solar panels or a heat pump can significantly boost your EPC score and reduce energy bills.

Need an EPC in London?

At EPCrate.co.uk, we are experienced EPC assessors providing fast, affordable, and compliant certificates across London.