Closing the performance gap. Our breakthrough innovation, VeriTherm, is a fast, simple tool used to verify the thermal performance of buildings. The platform takes real-time data from strategically placed sensors as the building is heated and then cools overnight. Patented algorithms compare recorded heating and cooling curves against calculated theoretical design.

VERITHERM 1.0 – How it works…

The Test Process –

Building Heated

1.The building is heated and allowed to cool overnight

Temperature Sensors

2.Strategically placed temperature sensors capture test data

Process Test Data

3.Unique algorithms process test data and compare against predicted heat loss targets

Displays & Reports

4.Digital dashboard captures, displays and reports test readings

Physical Evidence

5.Physical evidence proves whether the building envelope meets the required thermal value
The Outcomes –


Documented & repeatable test process

Asset Data

‘As Built’ asset data for digital twin/BIM model

Quality Assurance

Certificate of conformance to specification + warranty/quality assurance

Build Quality

Natural improvement in build quality as a result of thermal compliance testing


We have witnessed many pitfalls in the construction process. Information is frequently manipulated to meet standards, unlocked data within digital models can be altered and cold bridging often ignored rather than overcome.

During construction, products are regularly substituted and poor workmanship and/or the use of damaged materials often go unnoticed. The built environment is the largest contributor of carbon emissions globally and there is a clear ‘performance gap’ between design and construction. This prompted the question ‘Does your building thermally perform as specified.’



Currently, there is NO viable product/solution on the global market to test if a building thermally performs as specified. Building standards dictate minimum requirements for thermal efficiency, however, there is no testing protocol in place to ensure these requirements have been achieved. Over the years, innovators have struggled to develop a simple testing method that is suitable for market. We have seen some approaches reach market but they have failed to be adopted by industry due to long measurement periods, expensive techniques and complex models.



Redbarn Group’s solution tackles the challenge and unlocks new methodology which allows a quick and simple approach to in-situ thermal performance measurement. Our methodology was recently filed at the UK Patent Office in October 2018.

Our approach specifically looks at determining if heat losses are outside of design parameters i.e. if the designed thermal properties of the building have not been reached. Whereas existing methods that have failed to reach market look at measuring exact heat losses through a building envelope.