Alex on Instagram: "Tangential expansion. If it sounds fancy, you know it’s a real thing! It basically means that wood moves across the grain with seasonal change. This is especially common with plain sawn boards. In this case, the floor installers butted the hardwood up against the baseboard, which probably seemed OK at the moment. But after a year of seasonal change, the hardwood was squeezing the baseboard up and off the wall where the base ran parallel with the hardwood. Thus enters tangenti