Why is glass in old buildings thicker at the bottom and thinner at the top? Is it that glass is a viscous liquid? - Quora
![Glass melting from the window frame of a fire damaged building. (X-post from r/urbanexploration) : r/pics Glass melting from the window frame of a fire damaged building. (X-post from r/urbanexploration) : r/pics](https://external-preview.redd.it/q3TcvlEgjXQb4hHdlqf9pBl6y7Unyll8Rp6tpx50gRY.jpg?auto=webp&s=99711249f9074798ebaf161b08e84948159ae40b)
Glass melting from the window frame of a fire damaged building. (X-post from r/urbanexploration) : r/pics
![Glass viscosity calculations definitively debunk the myth of observable flow in medieval windows - The American Ceramic Society Glass viscosity calculations definitively debunk the myth of observable flow in medieval windows - The American Ceramic Society](https://ceramics.org/wp-content/uploads/2017/08/0803ctt-cathedral-lo-res.jpg)
Glass viscosity calculations definitively debunk the myth of observable flow in medieval windows - The American Ceramic Society
![Did you know older glass windows settle, becoming thicker at the bottom? This happens because glass isn't actually comp… | Architecture, Old buildings, Glass window Did you know older glass windows settle, becoming thicker at the bottom? This happens because glass isn't actually comp… | Architecture, Old buildings, Glass window](https://i.pinimg.com/originals/95/98/1f/95981fe8acaad302132b4e80bb44c87b.jpg)