Time to put a lid on overheating
How heat is transferred through a building is critical to creating a healthy internal environment
Imagine two scenarios a caravan and a stone built house, imagine them both on a warm summer’s day. In the caravan, as soon as the outside cladding starts to heat up, heat output is recorded within minutes on the inside face as some heat quickly transfers through the aluminium / lightweight insulation composite; whereas as the face of the stone wall heats up, the heat is absorbed by the stone as it progresses slowly from the outside to be delivered from the inside surface several hours later.
The interesting, and often baffling, aspect of this phenomena is that the two materials can have very similar u-values - so that in steady-state conditions where heat applied at a constant rate over a period of time to the external face of both materials, there is an equally constant flow from the inside surfaces of diminished heat.