Bespoke PSI Values
Improve accuracy of SAP calculations with tailored thermal junction values, reducing risk of failed compliance.

Bespoke PSI Values
Improve accuracy of SAP calculations with tailored thermal junction values, reducing risk of failed compliance.
What is it?
Custom thermal bridging values to improve SAP scores.
Why It Matters?
Can reduce insulation/material costs while still meeting Part L.
What standards do we adhere to?
BR497, BRE methodology.
Our Process
Review junction details
Thermal
modelling.
Provide PSI value certificates
Integrate into SAP/SBEM.
Compliance Bundles
Tailored packages to simplify your safety responsibilities and save you time.
As Designed Bundle
Ideal for planning and design stage
- SAP/SBEM Calculations (Design Stage)
- Overheating Assessment (Simplified or TM59)
- Water Efficiency Calculations
- Bespoke PSI Values (where required)
Book an As Designed bundle and get priority scheduling for your As Built stage testing.
As Built Bundle
Ideal for completion and sign-off
- SAP/SBEM Calculations (As Built)
- Air Pressure Testing
- Acoustic Testing
- Ventilation Flow Rate Testing
Book an As Designed + As Built package together and save 10% on total compliance costs.

Frequently Asked Questions
How quickly can you deliver results?
Many reports and test results can be turned around within 48 hours.
Can you work alongside my design team?
Yes — we regularly collaborate with architects, MEP consultants, and contractors to ensure smooth compliance.
Do you travel nationwide?
Yes — we operate across the UK.
Can I bundle services?
Yes — bundling services saves both time and money, and we’ll coordinate testing for maximum efficiency.