My home is a rural bungalow next to my home. There is a big elm tree that belongs to my neighbor. Their roots all grow under my house. Will it damage the house?
Find a thick root underground around the tree and drill a hole in it with tools such as thick nails. This hole is bigger. Prepare a set of drip equipment, fill the bottle with concentrated brine or hydrochloric acid, caustic soda and so on, then adjust the speed to the lowest, and slowly drip into the hole of the root, the root will be absorbed and sent to the whole tree, causing the death of the whole tree.