Design Solution · Building Envelope
Design Solution · Dream about it
Insulating and electrifying 1970s sheds to reach top EPC ratings.
Aging industrial units receive enhanced insulation, improved airtightness and heat pumps in place of gas, lifting EPC ratings from D to A/A+. Treating the low-grade existing shed fabric first makes the electrified services viable and cuts demand.
Upgrading 1970s industrial units from D-rated to A or A+ EPC by combining enhanced insulation, improved airtightness and heat pump replacement for gas is a credible commercial retrofit pathway that addresses both the energy performance gap and the 2030 EPC trajectory that many commercial landlords now face. The sequencing logic — fix the fabric before electrifying — is correct, because a heat pump in a leaky shed will underperform and consume more energy than the gas boiler it replaced. EPC improvement from D to A/A+ in a shed typology is an ambitious target, though achievable with over-cladding and upgraded rooflights, and the record provides no before-and-after measured energy consumption, no airtightness test data, and no post-completion occupier feedback to confirm the outcomes. The practical risks are tenant disruption during works, temporary roof penetrations during recladding, and the fact that EPC ratings for industrial buildings can be manipulated by modelling assumptions in a way that does not translate to real energy bills — actual consumption data from occupied tenants is the only reliable verification.
#retrofit #insulation #heat pump #epc #electrification