Conduction, which comes about when heat is transferred involving solids due to vibration in molecules. Insulation elements resist conductive heat transfer by trapping air or other gases in their framework, hence slowing down the movement of heat. This post needs further citations for verification. You should help improve this short https://cristianftdpz.thekatyblog.com/33307546/helping-the-others-realize-the-advantages-of-storm-windows