Of all the material types for a roof, a liquid roof coating is perhaps the oddest. It has multiple values, several material options and is definitely worth a more in-depth look.
Understanding Liquid Roof Options
Before the mid-20th century, liquid roof existed, but in an entirely different way than today. It used to be bitumen (think mortar) mixed with fillers, such as sand, straw, and later felt paper.
The one caveat was that bitumen needed to be applied hot. Piping hot, so as to form a liquid that could spread evenly. — And dangerously hot, because at times fires would occur. That’s not good, but it was the norm, until around 1960.
Enter the age of synthetics that amount to plastic and rubber in liquid form being adhered to the roof:
