Can you heat treat to kill the knotweed? Like injecting steam into the ground? Inspired by a demo reel of a ground cooking weed remover, I've experimented with

Can you heat treat to kill the knotweed? Like injecting steam into the ground? Inspired by a demo reel of a ground cooking weed remover, I've experimented with using the tea kettle to kill stuff in my drive way. Works pretty good. A few square inches at a time. I poke a few holes and pour in boiling water. The industrial size tool covers the ground with a foam, to create a thermal blanket. And then it cooks the ground. It looks like those street pothole fixing tractors, but using steam, instead of flames to remelt the asphalt. (The foam is like a thick bubble bath and will rinse away.) Just curious. I recently became a "forrest steward" volunteer, and knotweed was specifically called out in training. Do not touch! Immediately escalate! Ignorant, naive me thought blackberry and ivy were the final bosses.