Psi (Ψ) Calculations
Psi (Ψ) calculations assess thermal bridging at junctions between building elements, helping reduce heat loss, improve energy performance, and ensure compliance with Part L of UK Building Regulations.
Request a QuoteUnderstanding Thermal Bridging
Thermal bridging occurs where heat escapes through junctions between walls, floors, roofs, doors, and windows. Psi calculations measure these losses to optimize insulation and minimize energy waste.
By addressing thermal bridging early, buildings achieve better SAP and SBEM scores, lower carbon emissions, and reduced risk of condensation and mould.
Key Considerations in Psi Calculations
Junction Types
Assessment of walls, floors, roofs, windows, and door junctions.
Material Conductivity
Thermal properties of construction materials are factored into the calculation.
Junction Geometry
Shape and layout of elements affecting heat flow are analysed.
Heat Flow Analysis
Simulation or calculation of heat transfer across junctions.
Integration with SAP & SBEM
Psi values are used within SAP and SBEM calculations to determine overall building efficiency and generate EPC ratings. Accurate bridging data helps optimize energy performance and reduce carbon emissions.
Benefits of Psi Analysis
- Improves thermal performance and energy efficiency
- Supports compliance with Part L regulations
- Reduces cold spots that may lead to condensation or mould
- Enables tailored, project-specific thermal bridging solutions
Reduce Heat Loss
Design junctions to minimize energy wastage.
Boost EPC Ratings
Improving thermal bridging contributes to higher SAP and SBEM scores.
Condensation & Mould Prevention
Identify and eliminate cold spots where moisture may accumulate.
Custom Solutions
Tailored recommendations for each project’s unique junctions.