WOW. I would have never thought it would work. Awesome. Thanks for sharing.

I would have never thought this would work with plain old consumer grade spray foam!

The clam shell dust guard is one of the coolest things I've seen. I love it when people show their ingenuity with small little things like that.

Man what a genius you are. Simple yet effective! Thanks.

I love the ingenuity of preventing dust from making its way to the lungs! I am going to copy this anytime I drill and create dust. This should be standard safety practice for drilling and it is much more effective than an ordinary mask and definitely far more convenient.

The salad container is next level thinking!🧐

I knew the expansion with this foam was significant after draught sealing a door frame; when it was done I couldn’t shut the door!

Wow, had no idea this would actually work. Thank you.

simple solution to what i feared was a complex problem. thank you so much for taking the time to help us.

That was a great job and a great video I loved it👍🏻🇺🇸

That was an incredible watch, a new level to thinking out off the box.

Great, I might be able to save my patio

I paid over $2,000 to carolina basement systems to raise cracked and sunk driveway pad and back sidewalk. They say that the foam they use is different because of the addition of a hardener that keeps the foam from compressing over time. The tech managed to raise the slab and even it out but when done, the driveway and sidewalk slope toward the house still and he said that it is by design..... yes, I have a basement and no, if I end up with water damage, I certainly will not use them to address it.

Good share .. thanks

I'd love to see a follow-up video on the state of this project a year from now. My guess is that over time the walk way will sink back down due to the foam collapsing.

I really like seeing your organized approach.....planning and thinking ahead. Calm, organized, neat and clean. I like the music too. I'm wondering if there are different types of foam, namely that some might continue expanding even after you have 'pulled the plug'.

See I was wondering if this was the same stuff people charge thousands to do. Thanks for this content. You literally saved people thousands of dollars for putting this on the tube. Much appreciated

No one seems to add durability follow-up videos. How has this held up after almost 18 months?

That was one long stretch, very cool results!

Pretty cool

Wow 👍🏼that’s a real smart solution

What brand of foam did u use?

🤔You would think that you would have to have a void underneath the concrete to fill up with the foam also the foam doesn’t begin to expand unless it begins to dry I think the only thing that’s missing from this experiment is all the snow on the ground :-)

This great stuff foam is great stuff if you plan on using it to insulate a big dog house be sure to put a roof on last and leave the top of the walls open or it with rip the screws through the wood and pop the walls apart its expansion is crazy and powerful

My wife sent me a text the other day, a picture of a snake peeking it's head out of a the gap between the garage slab and the driveway. She won't even go in the garage now. She's thinks the garden snake will be in there to get her. I am concerned that somehow erosion has taken some soil away from the area under the driveway. So I've been thinking of how I could fill that area. Spray foam had not entered my mind. Maybe the evil KZfaq was listening to my thoughts again, but I ended up here and now I can't think of a better solution to my "snake problem". My wife is going to be elated. Thanks! As for this sidewalk, it could look better if you used one of those $25 circular pressure washer attachments. I bought one to clean the mildew-mold stuff from the north side of my house. But it also really worked great on my sidewalks and driveway.

As I say to my toddler “You’re doin it!!”

U King

Could this work on a porch slab

Going to try this on my driveway.

Awesome, but how do you know how much foam and that it won't raise too high or above your level that you are trying to achieve?

I think a pressure wash and skim coat of cement all would set you above the rest. Great visual of the project and process.

I am surprised there was no need to lift the slab before filling underneath. The foam lifted the slab. Looks pretty easy and you had a large section.

How do you stop it from expanding more than you want

I priced this out with a commercial poly jacking company and they would have charged about $1K for what you did for under $100! It's definitely worth going this route to save a few bucks!

How long does this last though?

Did you refill the drilled holes with concrete? And was the problem of the continued erosion resolved? Other words, you lifted the concrete but did you also solve the future issues of continued erosion?

If I add too much, the concrete may be lifted higher than I expected. How to control this?

I going to try this on a pool deck. How do you know when to stop putting in foam ?

This will never last. As soon as it soaks up moisture the foam will deflate. Need different foam for this…

What did you fill the holes with ?? Great video, I can't believe you only have 366 likes. GGEESSHH

I would thumbs up this video if the author would state how many seconds he set his timelapse for on the concrete-rise-timelapses part! Like is that one picture per 5 seconds or one picture per minute or what!?

There are higher density foams for lifting concrete slabs, specifically made for that application. I wonder how long a cheap can of expanding foam insulation will last. Maybe not long after insects find it makes a great nesting place. Higher density foam is impenetrable, as it's rock hard when cured. Lower density foams can crumble away under pressure or shock. If you're going through all the trouble of lifting a slab, use the right foam.

I'm at a loss? How does the foam expand, to do the lifting, without a void to fill, if you just drill holes for the fill tube?

How has this help up since you posted? Looking to do something similar

Out of curiosity, how's this "holding up" [pun intended] since you did this over a year ago?

This is amazing! what is the psi strength of the foam, i.e. could this work on a garage slab?

As long as you don’t have a large void in under the slab it would work.

What size drill bit did you use to mate with the tubing on the can?

May I ask how long your lift lasts?

How long before the foam dries out and and sinks again?

How did you know where to drill your holes? Is there a method to where to drill them?

what size drill bit did you use? 3/16"?

what is the cost per can? thanks for the great video!

Wow.....what size drill u use to drill the concrete? N how many cans?

Or a pair of knee-high rubber boots:-)

How long does that typically last for

How do you keep from lifting too far?

Cant visiually tell the difference😳

how many cans of Spray Foam did you use?

Did the foam job last more than a year?

One question: is the slab still up or has the foam gone soft?

Tried this it didn’t lift a thing. Not sure if my holes were too deep. I used the black can because I have a 2.75” slope away from my porch. Not sure if I have to look at it after 24 hours but all in all I had to go another route

I got estimates from several companies between $3-6k to level up my driveway. A few sections sank causing the opposite corners to rise. I couldn’t afford to hire them. Do you think the can spray foam could raise a much larger slab? 8’x12’ roughly about 1” in the sunken corner thus lowering the high spots?

Don't you want your sidewalk to slope downwards towards your driveway?

That's pretty cool but wouldn't it be easy to overlift and make it to high?

Band aid at best, it will deteriorate over time. Cheap tho.

Was für eine bescheuerte Ausführung. In Deutschland ein No go!

Goru

Wonder why it does not expand in the can and blow the can up. Under concrete seems like the same conditions as in the can.

Won't they just sink back down after a few years?

And three days later he rose again... You had a dip before but now you have a hill.

Lifting a sunken sidewalk with foam = Good! Soundtrack = Shit!

C'mon, drilling through a plastic cover!! That has to be the most sissy like thing I've seen

Ridiculous, inane, sophomoric "music" earns a dislike for an otherwise worthy video Why not just narate? Or just have the audio recording of the process sounds would be infinitely better.

Pitiful, and so very American! It appears we just don't know how to make videos! Why the horrible intrusive music instead of talking to us and educating us? Best of luck, but this is a rather awful format!

Spraying toxic foam into the ground is absolutely unnecessary and bad for the environment. I'm showing this video to my local EPA reps I actually believe this guy will be receiving a major fine for this.