A lot of homeowners in Everett, WA don’t realize how big the insulation difference is between single and double pane windows until winter hits. Single pane glass offers almost no thermal barrier, while double pane windows trap air (or gas) between layers, which helps reduce heat loss and outside noise. I was reading a breakdown of common issues in older homes and found some useful context here: visit the site — it explains why older single pane units often struggle with drafts and condensation.