With an ICF garage, what is a good product to use on the first 4+ inches from the slab to protect the drywall and allow for washing the garage floor with water?

I have used FRP, Fiberglass reinforced plywood, on a number of garage/shop projects. It's the same stuff that RV and truck boxes are made from. I use a full 4', and use sheetrock above that, with a trip piece covering the gap.

I stopped the drywall short of the floor by 1", and plan to just use vinyl trim (the kind that comes on a roll, and glues on). For messier applications, I've seen roofing metal used as a wainscoting of sorts for the first 4'.

You could screw a strip of 1/2" thick Duroc cement board of whatever height you desire at floor level to the ICF. Then butt the drywall up to that. Then install ceramic tile over the cement board and extend a 1/2" or so onto the drywall.

I have customers that use a synthetic wood-like trim or a synthetic decking in the garages they do.

Posted By emmetbrick on 01 Mar 2017 08:40 AM
I have customers that use a synthetic wood-like trim or a synthetic decking in the garages they do.

That is what I was thinking about doing with something like Trex.  I was planning on ripping a drywall thick step along the top of the back edge and bevel the outer face edge like a normal baseboard.  This would keep the DW a few inches off the slab.  It also has the advantage of being pretty tough so things like the floor jack should bounce right off without doing too much damage...

They also J bead the bottom of the MRDW . I think that helps seal it up as well.

Honestly? What I'd do is just bump the height of the footing a couple inches, leaving you a concrete "ledge" around the perimeter or the garage.
With your garage slab below this, filth may accumulate in the "gutter" of the slab, but it won't let water near the walls themselves.

Raising the footing a couple inches doesn’t work when it is wider than the ICF wall... We typically pour 3’ wide x 1’ thick footings for our ICF buildings. We just hold the drywall off the slab about 1/4” to create capillary break and then use 4” commercial rubber/vinyl baseboard. I believe that they still sell brooms, so there should be no need to flood a garage just to clean the slab? Doing so would likely cause water to leak under the slab around perimeter and be potentially prone to freezing/heaving.

In our area, people like a curb. It's hard to sell them on DW going close to the garage slab.