How do we prevent interstitial condensation with internal wall insulation? - Can I Just Ask? | Ep.35

Can I Just Ask… How do we prevent interstitial condensation with internal wall insulation? 💧🧱 The short answer is that vapour permeable, hygroscopic materials behave very differently from what a steady-state calculator might suggest. Rather than liquid moisture forming at the critical interface between the insulation and the wall, you get adsorbed moisture — individual water molecules bonding to the surface of the material. The surface area is vast, so it can hold significant amounts of moisture without affecting thermal performance or causing harm. That's why hygrothermal analysis, rather than steady-state modelling, is the right tool for assessing these systems, find out more by watching now!