Are you building an addition to your home? You’ll need to join your new foundation to the existing foundation.
You’ll need approved plans and permits for your addition. Although my husband is a professional (retired) carpenter, we strongly suggest you hire your own professional. This is a big project and the basis for the rest of your home build. In this post we’ll show you how we joined the existing foundation to our new foundation.
Tools and materials used:
- Drill and 5/8″ drill bit
Having already established our perimeter, we ran a string line along side the existing foundation overlapping 1 foot.
Once we got our layout square we ran a board down the string line overlapping the existing foundation. We sunk concrete stakes in the ground along the form.
We marked the foundation with spray paint where we needed to drill holes. We need 3 holes in the existing footer and 2 holes in the existing stem wall to make a strong connection to the new footer.
We drilled the holes into the existing foundation using a 5/8″ drill bit and concrete hammer drill. This is done on both ends of the house.
We blew the dust out of the drilled holes with the compressor hose so the epoxy can adhere.
With our new footing forms in place we inserted the 3 lines of rebar into the drilled holes and used epoxy glue to secure.
We now have a continuous footing that is structurally attached to the existing footing. See this post on how we built our footing and stem wall for more information.
This is how we joined our new foundation to the existing foundation of our home. Overlap the outer part of form, drill holes and insert rebar with epoxy. We hope this helps you on your home addition project.
We also built our own stem wall foundation.
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