How to Lay a Block Foundation

What You'll Need
Concrete blocks or slab
Steel Square
Corner pole

The durability, lifespan and capacity of a structure are greatly dependent on its block foundation. Simply put, a building’s success or failure is determined through its block foundation.  Regardless of how excellently designed or structured a building is, without a strong base, the whole structure will not last long. Thus, the kind of block foundation that a building will be built on is very important. It is considered as the most important aspect of any building structure. Contractors, engineers, architects and all construction personnel pay a great deal of attention in building the foundation. Most masonry walls have foundation made from concrete slabs or footers. These days, the use of a block foundation has gained considerable relevance in the industry.

Laying Out the Wall

It’s important to study and learn how to read construction drawings. When building a block foundation for a garage, home edition or other structure, it is necessary to identify the dimensions of the walls. The floor plan and elevation usually provide these details, thus the need to understand construction drawings. When building a block foundation, it is important to lay out walls according to the floor plan. The measurements in the floor plan should also be strictly followed. Window and door openings should be positioned accurately. It is necessary for the corners to be placed on the foundation in the same exact way as noted in the diagram of the foundation’s plan. The dimensions indicated in the floor plan should be reflection on the actual foundation and the floor slab or the footing. After all dimensions are properly marked, this should be checked with the floor plan to make sure that there are no inaccuracies.

Dry Run

The block foundation should be done starting with wall’s corners. The first course should be laid without mortar. This is important so that it can later be visually checked to make sure that the dimensions of the plan is matches with the measurements of the actual floor. The dry run will determine which blocks need cutting and which properly fits with the openings. In the dry run, the units of block are strung in the width and length of the floor, slab, the opening and the foundation. This will help determine how the bond can be sustained on top of the openings. The block’s dry run help arrange the units accurately. After the dry run is done, a steel square should be used to mark the precise position as well as angles of the corners.

Laying the Corner Units

Structuring corners is considered as the most essential aspect of masonry wall construction. Laying the corner units is important since it provide the guide for the construction of the remaining parts of the wall. The job is easier done through the use of a corner pole. A corner pole refers to any kind of post that can be position in a vertical position. The corner pole should be able to hold a firm mason line.

The most important aspect of building a block foundation is to follow the floor plan accordingly. It is also best to consult an expert on this matter.