This roofing material starts at about $3 per square foot. Concrete seems like a boring choice at a glance, but the truth is ...

In fact, SPF roofing’s R-value of 6.7 per inch is the highest of any roofing material, according to Sanders. Besides being a good insulator, SPF roofing has a number of other benefits.

With estimated related sales of $2.8 billion for building products such as pipes, decking and siding in addition to roofing materials, Westlake Royal ranks third among the largest North American ...