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Solid concrete wall contractors and concrete block contractors are long time competitors, and they are constantly comparing cost of construction, structural integrity and overall product quality. The controversy has been there for years.

The results of a CFA study, based on engineering analysis, show that unreinforced hollow core concrete block basement walls for residential construction are not nearly as strong as solid poured walls. When compared to block construction, a concrete wall goes up fast, increases productivity, and results in a superior basement time after time. Poured concrete walls provide builders and owners with stronger, drier, better basements. They offer performance that block walls simply can’t match, and they do it at a competitive price. The comparison advantages do not end at hollow-core block. In order to provide similar structural performances, concrete block walls must include vertical reinforcing and solid grouting of the hollow cores. Grouting and reinforcing the cores can improve the structural performance of concrete block but at a considerable increase in cost.

Solid concrete walls are formed between durable aluminum, steel or wood form walls set on footings by skilled concrete professionals. Once the forms are secured and plumbed, concrete is placed in the forms. Today’s poured wall professionals are experiencing tremendous business growth and success by embracing technology in their companies.

It is not uncommon for a poured wall contractor to use a concrete pump. The concrete pump gives them the freedom to place concrete at any location in the forms without bringing heavy equipment to the excavation. Concrete pumps can reach in excess of 150-ft to keep all heavy equipment clear of not just the excavation but also the apron surrounding the construction.

Cracks in walls have also been a long debated issue. Solid poured walls can develop cracks but the use of horizontal reinforcement keeps the number and width of these cracks to a minimum. Cracks, if the do occur, are easily detected and easily fixed. Most cracks are superficial shrinkage cracks. These cracks do not extend through the thickness of the wall and, therefore, do not leak.

Concrete block walls have “built-in” weak points at each horizontal and vertical joint. A typical 8’ high by 10’ long section of wall has nearly 160 lineal feet of weakened plane built into it. Most cracks in concrete block walls occur at these joints. Any increase in stress along the vertical surface of the wall expose these weakened areas.

©2006/10/25 Cedium Services

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