I am a Passivhaus Consultant specializing in retrofit, where I use Passivhaus modelling to guide people who want to integrate high-performance energy efficiency measures into whole house refurbishment. I find the Passivhaus approach to be holistic and robust, and I use it for accurate energy analysis and modelling. In addition to energy modelling, I get involved in all other aspects related to planning retrofit including thermal bridge modelling, MVHR design, consideration of moisture risk issues, and costing up materials needed. The idea is to get people to the point where they can actually start the work.
I am also a Carbonlite trainer for the Carbonlite Passivhaus Tradesperson course, having helped develop the training materials for this in 2018. This is a training for builders and site managers working on low energy construction projects.