Fiberglass is far and away the most popular choice for attic insulation material, and there’s a whole laundry list of reasons why. Aside from it being significantly more effective in energy savings when comparing it to foam insulation, the most convincing argument for choosing fiberglass is a simple one: it’s a fantastic product that you can buy for an irresistibly inexpensive price. But just how inexpensive exactly? Like all insulation materials, fiberglass doesn’t come with a “one size fits all”…