Over time the squares of cement have moved a bit and so there are some gaps between them and some edges are higher than others. What do you guys recommend to smooth it out a bit? Grind down the cement that is taller? Put something in the gaps? I don't want it to be easy to trip on.
I had some guys come out a while back and grind a few slabs down even on my sidewalk, since the city apparently doesn’t know how to build things that last. Cost a few hundred, and I’m happy with it.
I have seen companies that inject foam underneath slabs to bring them up to level. But I don’t know about all that.
Pictures help
At its worst one slab might be approaching 1" taller than the others. They are also moving apart so there is a gap of maybe 2" between them where they used to have a piece of wood, 1" wide. So I guess I've got two issues, getting the height aligned a bit better (or maybe grinding can make that better), and filling in the gaps between the blocks a bit with some type of material.
There's a company that has advertised on TV that raises concrete slabs and walkways.
I don't remember they name
I don't remember they name
Do you have a big tree within 60 foot of that slab?
Trees will push concrete a long ways.
My grandmothers driveway looked horrible cracks and scaling from all the salt put down for 50 years and not level between slabs.
I got concrete and concrete resurfacer and it looked nice when finished.
I used muriatic acid on it first to clean and etch it as there were a lot of oily spots.
Very wide floor squeege
This below may work for you if you want to make the low slab level with the high slab.
mix pour and taper it in with a long board.
Quickcrete sand topping mix.
Trees will push concrete a long ways.
My grandmothers driveway looked horrible cracks and scaling from all the salt put down for 50 years and not level between slabs.
I got concrete and concrete resurfacer and it looked nice when finished.
I used muriatic acid on it first to clean and etch it as there were a lot of oily spots.
Very wide floor squeege
This below may work for you if you want to make the low slab level with the high slab.
mix pour and taper it in with a long board.
Quickcrete sand topping mix.
Thanks for the advice everyone!
There are companies that can dig underneath the slab and inject an expanding foam (I think that’s what it is) and it will make slabs even again.
For the gaps, this stuff:
works great, but priced accordingly. Take measurements of your gap and purchase backer rod (foam rod) slightly larger than your widest gap and pack it down in gap till you have about 1/2" left till slab surface then caulk any holes or remaining gaps and dam up both ends needing filled. The sikaflex will find any hole or gap in your work area and will bleed out leaving you scrambling to patch the dam breech. Lol. Preparation is key. I used it on the transition between garage slab and driveway where the wood filler was loose and warping causing a trip hazard. Still holding strong 3 years later.
Sika 29 fl. oz. Sikaflex Self-Leveling Horizontal Joint Elastic Polyurethane Sealant in Gray 7116080 - The Home Depot
Sikaflex 29 fl. oz. Self-Leveling Sealant is a single component, self-leveling, premium-grade polyurethane sealant with an accelerated curing capacity used to seal gaps, joints and cracks. No tooling feature saves time and money. 29 fl. oz. sizes is ideal for larger projects.
www.homedepot.com
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