1. Foam board insulation Foam board insulation is one of the most common types of attic insulation. Also known as rigid foam insulation, it is made from a type of plastic and can be cut to size to ...

Pros: Foam board, aka rigid foam ... Aim for at least 13 to 14 inches of attic insulation if you live in a warmer climate and 16 to 18 inches in colder climates, assuming an insulation value ...