Block concrete

Also referred to as concrete masonry units (CMU), block concrete has been used for foundations for decades. The hollow blocks typically measure 8”x16”x8”, but sizes may vary de- pending on the weight load of the build- ing being constructed.

The blocks are installed in an overlapping pattern similar to bricks to ensure strength and stability. Reinforcement bars connect the blocks to the concrete footing of the building and the blocks are filled in and joined together using a concrete mortar mix.

“There are a lot of different foundation options today, but block concrete remains a favourite of many home builders,” ac- cording to Ken Sco , manufacturer representative at Brown’s Concrete Products Ltd. “It is a tried and true foundation that many contractors and workers are used to dealing with.”

Brown’s produces many landscaping stone and paving products, but the company also offers a full line of concrete blocks ideal for many applications including residential foundations.

A major advantage of block foundation is that they require no heavy wooden-forms to secure them . while the cement cures. When blocks are not  filled or properly reinforced, CMU foundations are weak and susceptible to ground and hydrostatic pressure. The area where blocks are joined together by mortar can be prone to cracks and leakage. CMU foundations require waterproof- ing and insulation solutions. Block concrete is more expensive than PWF.