The city of Oakland has not only has a wildfire problem, but an arsonist problem. This summer a construction site with a 7-story structure (196 new apartments) was burned to the ground in just a few hours allegedly by one person. I didn't think that was possible in 2017.

Is the issue with fire-retardant wood/framing materials that it is too expensive, toxic, or doesn't help once a certain temperature is reached ?