In modern architecture, striking designs often involve unusual shapes, large glazed surfaces, and intricate building envelopes. While these features make buildings visually stunning, they also create thermal bridging challenges—areas where heat escapes more easily due to breaks in insulation.
But how do Energy Performance Certificate (EPC) assessments take thermal bridging into account, especially in complex architecture?
At Urgent EPC, we deliver Residential EPCs and Same-Day EPCs across the UK, ensuring even intricate and high-spec properties are assessed with precision.
🌍 What is Thermal Bridging?
Thermal bridging occurs when heat flows through more conductive materials in a building’s structure, bypassing insulation. Common examples include:
Junctions between walls and floors.
Around windows and doors.
Balcony connections in high-rise buildings.
Complex roof intersections.
In complex architecture, where design pushes beyond standard layouts, the risk of thermal bridges—and therefore energy loss—increases.
🔍 How EPC Assessments Consider Thermal Bridging
EPC assessments are based on SAP (Standard Assessment Procedure) or RdSAP models, which use assumptions for typical thermal bridging unless detailed calculations are provided.
Default Thermal Bridging Values
If no specialist calculations are supplied, assessors apply standardised default values.
These are often conservative, which can reduce the property’s EPC rating.
Accredited Construction Details (ACDs)
If a property follows approved construction methods, EPC models can apply improved thermal bridging factors.
Custom Thermal Modelling
For highly complex architecture, developers may commission psi-value calculations from specialists.
These detailed inputs allow EPC assessors to reflect better performance in the rating.
👉 For detailed advice, see our About Us page where we explain how unique property designs are handled.
📊 The Impact of Thermal Bridging on EPC Ratings
Lower Insulation Efficiency – Even well-insulated walls lose effectiveness if thermal bridges are present.
Increased Energy Demand – More heating or cooling is required, raising running costs.
Reduced EPC Scores – Homes may score lower bands (e.g., D instead of C) due to unaccounted heat loss.
Moisture Risks – Cold spots can cause condensation, affecting both comfort and long-term property health.
✅ Strategies to Improve EPC Ratings in Complex Designs
For architects, developers, and landlords of non-standard buildings, there are ways to mitigate EPC impacts:
Use continuous insulation systems to reduce bridging.
Opt for thermally broken materials (e.g., for balcony connections).
Provide psi-value calculations during the EPC process to reflect real performance.
Incorporate high-performance glazing and airtight construction.
👉 Our Residential EPC service includes tailored recommendations for properties with unique designs.
⚡ Future of EPCs and Thermal Bridging
As building regulations tighten towards net-zero targets, EPC methodologies are expected to give more weight to thermal bridging. Advanced modelling will better capture the energy impacts of innovative but complex architecture.
This makes early design-stage planning critical for both compliance and long-term sustainability.
📞 Next Steps
If you’re an architect, developer, or homeowner with a complex property:
Arrange an EPC assessment to identify potential weak points.
Consider providing detailed thermal modelling for a more accurate EPC.
Use EPC recommendations to guide retrofits or new-build efficiency improvements.
👉 Check our Pricing Plan or Contact Us for expert guidance.
🌍 Final Word
Thermal bridging is a hidden but powerful factor in a building’s energy efficiency. For complex architecture, addressing it properly in EPC assessments ensures fairer ratings, compliance with regulations, and a path towards lower-carbon buildings.
At Urgent EPC, we specialise in providing accurate, fast, and reliable assessments—helping unique properties achieve the efficiency ratings they deserve.
👉 Book your Same-Day EPC today to secure compliance without delays.
