CMU (Concrete Masonry Unit)

Factory-manufactured concrete blocks used for structural and non-structural walls, foundations, and retaining walls. CMUs come in standard sizes (most common: 8x8x16 inches nominal) with hollow cores that can be reinforced with rebar and grout for structural applications. In Ontario construction, CMUs are valued for their fire resistance, durability, and thermal mass properties. Load-bearing CMU walls require proper reinforcement per building codes, while decorative split-face or ground-face CMUs provide architectural finishes without additional cladding. CMU foundations are common in residential construction where full-depth poured concrete isn't required.