Firegeezer is always a good place to go to read about the broader fire world. You may have noticed on the left side of this page in the “Other Fire Blogs” section, we automatically show an excerpt from his latest post.
He pointed to an interesting story (with cool pictures) on STATer911 about a vehicle fire that melted the vinyl siding on a nearby house. In wildland fire, we emphasize fire safe building materials. Vinyl siding is not fire safe.
Firewise.org advises:
Materials that melt or burn in relatively low temperatures, such as PVC and vinyl siding, should not be used, since they do not provide adequate protection and can melt in the heat of the wildfire.