I screwed up the elevation of the top of foundation for a 10†poured concrete foundation wall. I’d like to raise it at least 8â€. What might be good way to do this?
I was thinking one course of 8†high hollow concrete blocks might work. The existing foundation bolts would serve to fasten the course to the poured concrete. The ones in the way of the blocks would have to be cut or sawed off. Then the new course would get filled in, and new foundation bolts set as necessary.
Comments?
PS: – No, haven’t started framing yet, in case any one asks!
Replies
Use threaded rod and couplers to extend the bolts. Form it up, add a horizontal #5 and pour it solid.
Depending on the spacing of your bolts - some places make you put them close, some don't - you may be required to epoxy in some interim rebar into the existing foundation, bend it over and wire the horizontal to that.
What is the name of the CMU blocks you guys use down there for bond beams filled continuously?
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A row of 8" block is something I've seen numerous times, often on a floating slab. You should extend the existing bolts so they project through the course of block and the sill plate. Don't cut any off. Hollow block is often used and then filled with concrete. This is fine for most residential needs. The problem is in the lateral strength of the block to concrete joint. I've seen unbolted block courses knocked over when framers lifted the wall. Bolting through the block and a first sill plate will keep that from happening. You can always form it and pour all concrete but it's more of a job. The new to old joint is still a weak spot. Any "tooth" you can add at this juncture will help.
Beat it to fit / Paint it to match
How about a simple 2x pony wall?