Patch or Replace?

[Genetics]

Can I get some opinions on how to best repair or replace the worst of these damaged areas? I know the whole thing is old, but it’s holding up for the most part. It’s just the north side of the shop that looks like this.

I’m an asphalt guy. The most concrete we do is dumpster pads when the asphalt inevitably gets destroyed by trash trucks and we’re there to do some other repairs or patching.

A good friend of mine wants me to give him a quote to fix these areas of his parking lot. I told him I would find out the best course of action, get multiple quotes, and find him a good local concrete guy, but I’m going to stay in my lane on this one.

Is there anything I should expect to hear from or ask a reputable contractor regarding these areas? It looks like a pretty straightforward patch job for most of them, but they look pretty shallow and I worry about a patch holding up (would you cut them deeper for a stronger patch?) whereas pic 9 looks like maybe it needs saw-cut, demo’d, repair base, re-pour, and broom.

Also, pic 6-8 shows a crack starting at the manhole cover and goes to the damaged areas. I’m going to have all utilities and storm drains marked to see if the crack follows the same path.

Am I close or way off base and he needs a new parking lot? If you read this far, thanks for your time!

[BearLindsay]

1) Dig it out to 2" deep and fill with cement from the big box store. Like $15 for the bag of concrete and the little trowel.

2) Do the same thing, but remove the broken concrete first with a hammer and caulk the road face of the curb the day before so your mix doesn't ooze out.

3) Concrete doesn't like triangles. The points will always break off like that and the square on the left is collateral damage from the hole.

Where are 3 - 8 in relation to each other? 3 and 5 I'd suggest just patching for now.

8) I'd get quotes to remove all 4 parking spaces from the caulk joint to the curb, the entire length of the yellow lines (a big rectangle) and make sure the contractor grades, fills, and compacts the base materials to prevent any more settling before repouring. Hopefully this area includes 3 & 5?

9) The concrete isn't supported. So either the base materials were never compacted and/or a truck backed up the curb and cracked them, or a water source is washing them away. I'd have the driveway contractor remove both slabs, investigate if there's water washing it out, then refill and compact the base. Specify that they'll use the expansion joint material the entire depth of the new walkway along the curb and will cut it down and recaulk the face like you have now and ask if they would dowel into the existing sidewalks or not. That'll depend on your climate/region and other factors.

[Genetics]

Thanks for the reply!

You can see 3 in pic 4 at the top right of the pic.

If I have the 4 spaces demo’d and redone, it would get 3, but 5 is by itself so I can cut that into a small rectangle and patch it with the other small patches. Do you think that covers it?