Concrete blocks form an all-in-one exterior and interior wall that eliminates the cost of paint and drywall. They contain a white admixture that helps bounce heat off the outside of the building while brightening the inside. The blocks are also filled with spray foam for insulation. Photo 2 of 8 in Micro Dwellings in Phoenix Get Creative With Under 500 Square Feet by Laura C. Mallonee

Micro Dwellings in Phoenix Get Creative With Under 500 Square Feet

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Concrete blocks form an all-in-one exterior and interior wall that eliminates the cost of paint and drywall. They contain a white admixture that helps bounce heat off the outside of the building while brightening the inside. The blocks are also filled with spray foam for insulation.