Lisa is one of the most experienced building performance consultants working in the UK. She has extensive knowledge of in-use building operation and management, building physics, low-energy services, and fabric design for new build and retrofits domestic and non-domestic buildings. She takes an evidence-based approach to building performance and is an expert in built environment research, technical risk management and post-occupancy evaluation. We spoke to Lisa about PAS 2035, how it can be improved, and some of the projects she has been evaluating over the last few years. Through our discussion with Lisa, it’s clear that if we’re to meet our climate change objectives and decarbonise our homes, we need to understand the lessons of the past so as not to repeat them in the future. Evaluation is critical, and as a wise man once said, if you can’t measure it, you can’t improve it.