Concrete Block

Concrete Block Walls: Low Tech and Durable

Concrete masonry unit walls are durable and easily erected

A tried-and-true system

Concrete masonry units (CMUs) are the standard hollow concrete blocks; the product has been around for more than a century. CMU use is more common in the southeastern U.S. than in cold-weather regions. CMUs are resistant to fire and insects, and, with adequate steel reinforcement, also offer high wind resistance. Walls can be insulated on the inside or the outside.

An only slightly younger cousin to CMUs are aerated autoclaved concrete (AAC) blocks. Sold under several brand names, AAC blocks are made with ...