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Concrete Masonry Units

Precision Block

Precision concrete masonry units (CMU) are the most widely utilized type of concrete block. They have square edges and a smooth texture to create a clean, polished look to your concrete project.

When specifying concrete masonry units, the dimensions are indicated in the following manner: width x height x length. Dimensions of precision masonry units are usually expressed in terms of their nominal size, which is 3/8 of an inch greater than their actual size. This 3/8 of an inch difference accommodates the standard 3/8 inch mortar joint that is utilized with precision units. For example, a unit with the nominal dimensions of 8” x 8 x 16” would have actual dimensions of 7-5/8” x 7-5/8” x 15-5/8”.

Applicable Standards and Quality Assurance

The precision concrete masonry units manufactured by CastleLite Block, LLC comply with the requirements of ASTM-C90 and section 21-4 of the uniform building code. CastleLite Block maintains an inventory of Precision CMU in both lightweight and medium weight units. Normal weight units, also known as heavyweight units, are available as a special order item.

CastleLite Block, LLC participates in a testing program in which an independent laboratory randomly samples and tests our concrete masonry units.

Available Colors for Precision Block

CastleLite Block, LLC stocks a wide variety of precision units in natural grey (Color No. 110) and stock tan (Color No. 145) colors. A wide variety of custom colors may be special ordered. Please contact a CastleLite Block representative for more information regarding custom colors.

The raw materials utilized in the manufacture of concrete masonry units are subject to natural variations in color which affect the color of the finished product. It is important that our customers understand that color can be guaranteed only to a range of color. Even natural grey units, which are manufactured without pigments, may have a noticeable shade variations from run to run.

Available Sizes of Precision Block

Precision units are readily available in 4-inch and 8-inch heights. Available widths include 4-inch, 6-inch, 8-inch, 12-inch and 16-inch. Please note that 10-inch wide units are available by special order only.

Many of the available shapes and sizes of precision block are shown below. CastleLite Block, LLC is constantly adding new items to its product line. Please call our office at 707-678-3465 if you have questions regarding additional shapes and sizes.

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