Thermal bridges are areas of a building where heat is transferred at a higher rate than the surrounding structure. These weak points—commonly found around windows, doors, wall junctions, roofs, and balconies—can significantly affect a property’s Energy Performance Certificate (EPC) rating.

1. What Are Thermal Bridges?

A thermal bridge occurs when materials with higher thermal conductivity, like steel or concrete, create a path for heat to bypass insulation. This can lead to localised heat loss, cold spots, and even condensation issues inside the building. Understanding and mitigating thermal bridges is essential for accurate EPC calculations. Learn more about EPC assessments on our Booking page.

2. Impact on EPC Ratings

EPC software accounts for the energy lost through thermal bridges. Even small, unaddressed bridges can reduce a property’s overall efficiency score, leading to a lower EPC rating. Proper design, construction, and insulation strategies can help minimise these losses.

3. Common Sources of Thermal Bridging

  • Junctions between walls and roofs or floors

  • Around window and door frames

  • Balcony connections or cantilevered structures

  • Structural elements like beams or steel supports

Identifying these areas and addressing them during construction or retrofitting is crucial for improving energy efficiency. Explore our residential EPC services for expert guidance.

4. Mitigation Strategies

  • Use thermal break materials in structural elements

  • Ensure continuous insulation layers across junctions

  • Install high-performance windows with insulated frames

  • Apply airtightness measures to prevent unwanted heat loss

For properties with existing thermal bridging issues, professional EPC assessors can provide recommendations to improve energy performance. Contact our EPC experts for tailored advice.

Practical Tips for Homeowners

  • Identify potential thermal bridges in your property before assessment.

  • Upgrade insulation at junctions, window frames, and structural elements.

  • Maintain airtightness and consider thermal break materials.

  • Ensure all mitigation measures are included in your EPC assessment.

For more information about improving EPC ratings and reducing energy loss, visit our About Us page.