Japanese Knotweed is a terror for many homeowners and homebuyers. The weed can stop you from getting a mortgage because of how fast it can grow and how quickly it can get out of control. Indeed, this weed can sink roots deep enough to cause structural damage to properties. The tarmac and brickwork of your home could crack and drains underneath your property may get blocked because of it. As this weed makes it near impossible to get a mortgage it can leave sellers stuck with their home.