How To Fix A Sunken Sidewalk With Spray Foam

Complete List Of All My Favorite Tools – https://geni.us/VYIp51
Great Stuff (Big Gap) – https://geni.us/BdiBEC

Supplies Used
Nylon Cup Brush (For Drill): https://geni.us/3iESD
Tremco Vulkem 45 SSL: https://geni.us/FiPeg
IRWIN 6" C Clamp: https://geni.us/KFQd5K
3/4" Backer Rod (20'): https://geni.us/bCyfQBy
5/8" Backer Rod (20'): https://geni.us/Yhxznv8
12 ton bottle jack: https://geni.us/BkcTT

DISCLAIMER: This video and description contain affiliate links, which means that if you click on one of the product links, I’ll receive a small commission.

Pour a new slab

I know this video is a few years older, but can you make a video of how it's been holding up and what would you do different if anything?

I follow all your videos and save them for reference too complete around the house. Would be great to see how they have held up and based on your new skills acquired over time what you would do different.

Keep up the great work.

Forgive my lack of knowledge but this seems way more tedious and involved than just breaking that slab, and pouring a new one.

Too much talk

creative, but……
just removing the slab and fixing it properly would be my choice.

These videos are great and all but who has all these tools? I don’t. I mean huge C clamps, the lifters. It adds up to a lot. I have a major issue of a slab moving away from the house and slowly basically faking down a decline in the lawn. A steep decline. I wish I could life the slab up and put like 2 tons of new dirt down and put the slab back down. While researching I saw people say this spray foam ends up getting brittle and with moisture breaking down. I mean a nice flat area like this life the whole slab up and put dirt

This is a total waste of expense for this tiny slab, sorry. I can appreciate your ingenuity but, simply put destroy the slab and haul away and re-pour. Then pressure wash the rest. Hardly any tools and waste of extra money. Your method will eventually collapse again leaving someone else to fix.

A sidewalk? Shouldn't the government do the repairs?

After getting quoted 750 to do this, i found this video. Almost warm enough for me to try this

"How to inject chemicals directly into the water supply"

really good job, thanks for all the detail

Did your repair hold up after 2 years?

The city owns the problem. Unfortunately, I just deal with it.

I'd be wondering what kind of chemicals end up in the ground water as a result of using the "Great Stuff".

not bad, but after all that work you could have just dug a little more and put some bricks, rock, and dirt under it as well because the foam will likely settle and break down over much less time and sink again, however if you had put a few bricks under there in addition to the foam it would last much longer

amazing video…well done…wish i was a man

Terrible idea. Its this kind of short term mentality that contaminates water sources everywhere

Errrrrrrm ………. yeessssssss …… well.

Step one: DONT!

Unless you fix the foundation it just going to sink and settle again.

My time is too valuable. I'd spend the $300 for hiring a professional to do this. But great video for the poor masses….

Patch not 'fix'…

Wouldn't it be a lot quicker and cheaper just to lift the slab slightly and put some more mortar under it???

Coulda just busted it up and poured a new block way quicker lol.

Can I eat great stuff?

Could you have used drop-in anchors? A 5/8" bolt anchor has about 3,000 lb pullout strength. Your one slab probably only weighs about 800 lb.

Great job

I am curious, If you spent all that time lifting the slab, why not stuff in concrete, wouldn't that be a more long term solution, youi also had some bags back there

Great video brother! These methods are applicable/scalable to a variety of concrete repairs.

Thank you using inches not cm’s

Would have been cheaper to break it up add a little stone and pour a new slab …… why so complicated?

QUESTION???Can i do the same procedure with driveway slabs?

It would’ve cost you less and you would’ve been done faster with a sledgehammer and a shovel and some fresh concrete

Thank you! Going to give it a go.

Who has all the tools needed and would ever use them again making the cost of buying all of that not worth it? No? Wouldn’t it be around the same price or cheaper to have a professional handyman do a project like this?

At this point it’s about the cost of paying someone else to do it that already has the tools 😢

Superb demonstration. We will give this a try. Thank you.

All the money spent on bottle jacks, C-clamps, 4×4 posts, chain, hooks, spray foam, etc etc you could bought a few bags of concrete and just busted it out and repoured that piece

Great work!

I just dug around the slab in question, hiked it up at the corners with an Adze (google it) and stick rocks at the corners. I went around it a few times to get it to where I wanted it. Oh, I pre-drilled holes. Shot my foam. Worked great. BUT I love your contraption! Buying all that would have been expensive. I would have just broke it out and re-poured the concrete.

This wins first prize for best click-bait title on YouTube. So glad he wasn't asked, "What time is it"?

Perfect job. Thanks

I’m pretty sure the hole filling foam isn’t the best product to use. Does anybody have a name and source for a proper closed cell polyurethane foam to use for DIY support of, e.g. a wide concrete driveway?

can someone explain why not just lift the slab and re-surface the ground ?

A very elaborate setup for what it does not practical at be all.

There are soooo many other ways, too much ado about nothing.