Preserving historic character while improving energy-efficiency We explored various wall insulation options for the Pipe Factory retrofit, each evaluated for building costs, operational costs, heritage impact, spatial quality, acoustic performance, and other factors to give our client the best information to make decisions. Option 1 – Minimal Touch Option 2 - Partially Insulated Option 3 - Fully Insulated Option 4 - Target EnerPHit Harley Haddow used the Passivhaus Planning Package (PHPP) modeling to compare these options, focusing on fabric performance and the energy consumption of the building envelope. See the findings of the study above. During a stakeholder consultation event, it was noted that a highly insulated approach might hide or remove too much of the building’s original fabric and could be prohibitively expensive despite lowering operational costs. Conversely, a “light touch” approach wouldn’t provide the necessary thermal upgrades. The preferred solution strikes a balance: insulating most of the building with a product that preserves architectural details while leaving one floor with exposed brickwork. What’s your preferred option?