Psi-Value Calculations

Increase the chance of your dwelling meeting SAP compliance first time round with Psi-Value calculations from our experienced team of thermal modellers.

Book your Psi-Value Calculations today!

Speed

Our accredited thermal modellers can calculate junctions quickly and efficiently, providing a 24 hour turnaround on services when required.

Service

Our specialist software means we can make recommendations on how to reduce a building’s carbon emissions, lower energy and construction costs and ensure that dwellings are SAP 10 compliant.

Value

We work with architects and design teams alike to provide a cost-effective solution.

How it works

We receive your junction details and section drawings.

The Psi-Value Calculations are created through specialist thermal modelling software.

If there are any recommendations our assessor will work with your design team to improve the thermal performance of your detail.

The final Psi-Value is calculated showing the overall heat loss at thermal bridges.

All documents are supplied to you to meet your deadlines.

How it works

We receive your junction details and section drawings

If there are any recommendations our assessor will work with your design team to improve the thermal performance of your detail

All documents are supplied to you to meet your deadlines

The Psi-Value Calculations are created through specialist thermal modelling software

The final Psi-Value is calculated showing the overall heat loss at thermal bridges

Meet our accredited thermal modellers

Our thermal modellers are trained to the latest BR497 standard.

Joe Mountain

Tom Gibson

Ian Ferguson

Book your Psi-Value Calculations today!

To comply with Part L1A Building regulations, all SAP assessments must include Psi-Value calculations.

Where two adjoining materials exist within a construction, e.g. mortar and blocks, or where two constructions come together, e.g. a wall/floor junctions, a thermal bridge is created.

Estimated to account for up to 30% of a dwelling’s heat loss, thermal bridges within dwellings contribute significantly to heat loss, energy use and Part L1A compliance.

Each material of an architectural detail is recreated in a thermal modelling software. A thermal conductivity is assigned along with boundary conditions (similar to a U-value) and the resultant model provides a Psi-Value. In addition, heat flows and temperatures through the model are recorded so that guidance can be offered on how to further improve the performance of the junction.

Thermal Modelling provided by C80 Solutions ensures that the bespoke Psi-Value of all thermal bridging lengths can be measured. Our specialist software delivers a 2D and 3D analysis which allows us to identify, assess and rectify areas of thermal bridging in construction detailing. This means we can make recommendations on how to reduce a building’s carbon emissions, lower energy and construction costs and ultimately ensure that dwellings are SAP 10 compliant.

We can usually get around 8 junctions calculated in 1 day, so it’s really dependant on how many junctions need calculating per project.

  • BR497 standard assessors
  • We can deliver both 2D and 3D calculations
  • Fast turnaround
  • Experienced dedicated assessor from start to finish
  • Nationwide cover

Pricing will vary depending on size and complexity of the project. 

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