Willamette Graystone Vent Well Block Gray 18 in. x 8 in. x 5 in.

Concrete blocks have become the preferred building material of architects worldwide, because it is one of the safest, quietest, and most cost-effective options. Not only is it highly fire, wind and earthquake resistant, it also repels mold, which is rapidly becoming one of the biggest problems in homes and buildings around the country. The concrete block has unparalleled thermal properties and is highly sound absorbent, providing a 'near perfect' building material for any type of construction. Willamette Graystone has manufactured concrete block for more than 50 years. They remain Oregon's industry leader in quality and endurance testing.