Follow our blog as we begin construction on one of the biggest garage additions in Virginia Beach. This custom garage addition is 4,000 square feet. As we begin building this garage we will write about the different stages of construction from beginning to end. Today we will talk about the foundation.
The foundation for any type of addition starts with a continuous footing. Continuous footings run the entire perimeter of this garage addition. Footings must be a minimum of 12 inches deep and be on adequately compacted soil. The purpose of the footing is to carry the weight load of the walls and roof of the addition; all additions require continuous footings in Virginia Beach. The footing on this addition is 12 inches thick and 18 inches wide all the way around. Due to the size of this garage the footing has been specifically engineered to carry 16 feet tall walls and a roof span of 50 feet.
Once the footing is properly prepared for this garage we are ready to pour the footing to proper depth and height with concrete. The footing for this particular garage has #4 rebar run continuously with an overlap for added strength. Initially the rebar is laid in the footing and at the proper time while working the concrete, the rebar is pulled up to the half-way point of the garage addition footing for maximum strength.
Now that the garage footing is properly poured, it’s time to put CMU block on top of the footing. To start the block work, first foundation points need to be set. This procedure ensures that all walls are square and parallel. For this particular garage addition the mason’s put an FHA block on top on the top coarse of the block wall. This solid FHA block is the final surface on top of the footing and is where the framing will begin. This block being exactly where it needs to be for this garage addition is critical to the next stage of construction. Anchor bolts are set in the FHA block and will become the positive connection point holding the garage walls to the foundation.
The purpose of any particular garage addition helps determine the specifications for the concrete slab. This garage will be used for storing and working on antique and collectible automobiles; it will also feature a lift for working on the vehicles. Taking all of this into consideration the slab thickness will be 6 inches thick and the concrete will be 4500 PSI. The preparation for the slab consists of sand and rebar. The sand spread is 3-4 inches thick and is compacted down with a compactor. This helps give us a more stable compacted surface to pour the garage floor. Our slab for this garage addition also has 8 gauge wires running through it giving the garage floor slab additional strength. Once we put a smooth finish on the garage floor it is time to let the concrete cure before we begin framing the garage.