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Question DetailsAsked on 1/15/2017

one side of my garage slab has a curb and the other doesn't how do I make sure the walls are even when installed?

Garage slab is 36 x 24 and one side of the 24' has a curb and the other doesn't. Should I build it up with blocks or just use lumber?

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2 Answers


If you intend to hose the garage down to clean the floor, or wet-broom it frequently, I would form up and cast a curb the rest of the way around the three sides so the base of the wall does not get wet and discolored. Ditto if you plan on fully finishing the garage and keeping it very clean and pristine, rather than just rough painting it. Remember if putting a wall on it you need to put in anchor bolts when you case the curb.

Otherwise, you have a couple of choices -

1) finish the wall down to concrete all around, which would mean lower base elevation for the wall on one or more sides - and might possibly mean longer drywall sheets (and more wastage) depending on wall height on the uncurbed side

2) ditto to above, but put maybe a different colored painted band (like with garage floor paint for good protection against cleaning) or construction-adhesive applied plastic baseboard trim all around the bottom down to slab level, including on the face of the curb, so you have a consistent height base appearance even though the wall behind is different bottom height on different sides

3) use the curb as the foundation for full-wall shelving or cabinets, which would get them up off the ground (a good thing) and cover the different look on the different walls

4) build up the uncurbed side with treated timber (to avoid rot/insect issues) to curb height as a bottom plate acting as a curb, then build the wall on top of that matching the other side(s). Would need anchor bolts same as with putting in a curb.

I would NOT use block to raise the low side unless it is structural cinder block or CMU mortared in like normal foundation wall construction - to avoid forming dirt and water pockets under the wall, plus instability possibilities. And if load bearing wall the block would have to be reinforced and concrete-filled core per code.

Certainly, from an inspector's and future buyer's standpoints, putting a curb on the other side would probably be preferable - either as a footing as such or wider to serve as a cabinet base too, since you have such a wide garage (and yes, I am jealous even though I have a 2-1/2 car garage already).

Answered 3 years ago by LCD



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