Block Basement Walls Vs. Poured Basement Walls

Block Construction

• Block construction consists of a mason setting one block at a time on top of an existing row of blocks, adding new blocks, and new rows, until the wall is finished. Mortar, or a paste-like application of cement, is used between the blocks to hold them together. Most construction blocks are hollow, and often have rebar, or thick iron wire, running through the hollow spaces, which are then filled with cement. This strengthens the wall but adds to the cost.

Poured Construction

• Poured walls are created in a single operation a concrete contractor. A mold is made from wood which outlines the shape of the walls. Often, the contractor will place rebar to run vertically in the open space of the mold. The concrete is mixed in a large truck and then poured into the mold like cake batter. Because of its elasticity, the wet concrete it is not limited to straight lines but can be shaped and curved according to the mold to meet any variety of home styles.

Differences

• Poured concrete basement walls are much stronger than similar-sized block basement walls. They have no joints, unlike a block wall, where pressure may force the joint apart. They also are more aesthetically pleasing when they are left bare. Concrete walls are often colored at installation to match the rest of the home decor, while concrete blocks are painted or stuccoed over with a thin layer of colored cement.

Considerations

• Many variables determine the quality of one type of basement wall compared to the other, including the knowledge and experience of the contractor, the quality of workmanship that goes into the construction. the thickness of the wall and amount of supporting material such as rebar, and the type of cement used in the mixture. Both block and poured basement walls provide adequate strength and waterproofing if the walls are installed properly, the outside water is directed away from the walls with a drainage system and the yard grading is up to code.