Pouring Concrete OVER Concrete (New Garage Floor over The Old One)

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Pouring concrete over concrete. In this video I'm pouring a new concrete floor over the existing concrete floor.
We're giving the home owner a new garage floor by pouring a 3" to 5" thick concrete floor right over his old, and very unlevel, existing garage floor.
The homeowner was having water get into his garage from a driveway that sloped towards the garage floor.
The floor was too low. It needed to be raised so he could re-do his driveway and correct the water problem.
His existing garage floor was old but sound. It was very unlevel though so pouring a new floor would also correct that issue.
Watch as we pour a new floor over the old one and fix his water problem, plus slope the new floor towards the front to shed any water he does get on the floor.
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Опубликовано:

8 авг 2021

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Комментарии : 341

@ThePete2432 2 года назад

I did the same thing at my house years ago, people had lots of negative comments… but I’ve had zero issues and my garage is now dry

@Irideonandon Год назад

I have three 1 car garage floors in very good shape for three small rentals i bought. Poured originally in 1941 but now I need to raise them 5.5 inches to match the modern gravel alley grade they exit to. Right now they are not usable only because since the 1980's you couldn't get a car in/out. I'm just a DIYer and this video answered a bunch of questions. Thanks!!

@davidduffield7553 2 года назад

Very informative. The use of a floor and it's slope will redo a lot of projects that need to be done. The thickness of the recover well change a lot of water problems.

@mking3219 2 года назад

Yea definitely thinking about doing this,we have a 30'x60' two bay,bit of blistering. Was an old mechanic shop,no sealer,just broomed. Basically gonna be a place for light truck, and a compact car, with my aquaponics system. So thanks for the video

@peigryan3355 2 года назад

One of the things that you said, made me right about Breaking up my existing yard. It's a project for my dog run. Thanks very much.

@hawaiiansunrise8984 2 года назад

It's great to watch you work!

@eric_188 2 года назад

Love your videos. Very informative. Keep them coming.

@Emilthehun 2 года назад

That's some nice working right there! Reminds me of the old guys when I worked as a Mason helper.

@jmconcretecoloradosprings 2 года назад

My father has done this more than a few times. If the concrete under is in good condition then I see no problem with doing it. Clean it up and knock it out. Great video and good looking job Mike!

@josecondemarin9586 2 года назад

You guys make it look so easy, but that how professional make look like, the concrete floor is going to look great 👍. Thanks 😊

@rongrose3746 2 года назад

As allways, you guys make it look easy !

@frankjacoby9460 19 дней назад

I will be pouring over old concrete; this video is very helpful!

@harrisond8132 7 месяцев назад

I have the exact same issue, so good to know. Thanks!

@desifrazier6860 2 года назад

Hey mike love your work I watch yours and Odell complete concrete it help me a lot I just across this video and I just got this done for my moms 4,000 psi over the old some places where 3 1/2 but others kids low cut some away but put others 6 inches to slope to 3 1/2 it came out great single bay garage out to drive way we use it for walk way only. Now no cars and it it is good to have a good strong person that can take the concrete so next send me tee she’s strong I can tell that cause concrete is a job be blessed thanks for sharing

@63flight 2 года назад

Just started to watch your videos. 30 years as bricklayer/ stone mason and I've done my share of concrete. I'm sitting here saying man they pour that stuff wet. But once you said and showed how you screed I understand why. Interesting technique and great finished product. Subbed! 👍

@mateoarguello7193 2 года назад

I'm a 3ed generation concrete man. And if you pour it to wet it loses it's strength and is prone to pill and chip

@63flight 2 года назад

@@mateoarguello7193 If you listen to Mike he explains the additive used to pour the way he does. It's not like pouring straight out soup that takes forever to set. (that is not good) but his pours set up just fine.

@michaeldelvecchio7898 2 года назад

Really appreciate the variety of videos you post Mike. Always anxious to see what type of job and specs you will be videoing and posting next. Its a shame more of the younger crowd doesn't appreciate the trades.

@racingjunk7024 2 года назад

I’m part of the younger crowd and I’m a union concrete man so it’s not us all

@michaeldelvecchio7898 2 года назад

@@racingjunk7024 good to hear brotha..

@geraldjones5805 2 года назад

Whenever I need work done I appreciate the skilled trades. Young people will too.

@johnwaynebrooks 2 года назад

perfect time to add a floor drain!

@kencalder1826 2 года назад

Should I use bonding agent with 1.5 inch feathered top coat for repairing garage floor and parking pad in front of garage doors.

@johnwaynebrooks 2 года назад

@@kencalder1826 wouldn't hurt. Drill tapcons and tie rebar off to them as an easy and quick lateral mechanical bond.

@kencalder1826 2 года назад

Need to feather it in to get correct slope can't use rebar

@johnwaynebrooks 2 года назад

@@kencalder1826 use tapcons anyways. Perfect for skimming

@bluesdriver6354 2 года назад

Beautiful. I need this!!!

@williamd.costigan3 2 года назад

Hey Mike, I'll bet you know a lot about the concrete work that goes on under new framing, for example the footing under the new garage door frame.

@nickyengle9668 2 года назад

yes, this is why i found this video,i got 2 old carports that i wanna do.perfect question

@jimnicholson6902 2 года назад

Great job!!!

@Cook-px8ne 2 года назад

the hands tell his story.... the walk back screed. many styles but this most popular ive seen

@brentelliott2971 2 года назад

Always put 6 mil down, when the new floor starts to shrink,it won't get stuck and pull itself apart

@ThePerfectSeason1972 2 года назад

Wow, that’s a lot of work there.

@IGoProEVERYTHING 2 года назад

The Concrete Truck broke down. I found your videos doing research on replacing my basement floor. It was around 100 years old and in 2 layers at least a year apart. The first layer tapered 2" from the back to 3" in the front. The second layer tapered 1" in front to 2" in the back. Because they first layer had been walked on and properly clean they did not adhere. The floor also sits directly on the blue clay river bed. So when it rains hard and in the spring the to broken layer would float. Out of all research I did, not once was a concrete truck broken down mentioned. In Epping ,NH I worked with a few concrete trucks and no one ever mentioned a truck breaking down. You can check out my last upload "Ultimate front yard" to see the waterfall I worked on. I did not have a camera when it was being built 15 years ago:(

@kasken719 2 года назад

Been thinking about have this done. Want sure if it was possible. Very nice job done on the video and the garage.

@krazyr8erfan 2 года назад

nice work

@johnkulpowich5260 2 года назад

Nice job

@d5ncat227 2 года назад

Iv also been pouring for years only custom work,no house builders, only true custom work. Iv never poured over old concrete I think it will crack fast over the existing crack , but I'll try it now, and I also use vibra strike screeds😁

@74stevedc 2 года назад

Mike looks good, we do maybe 8-10 a year. Do you guys ever do driveway's? Have done a few but not very common in Massachusetts freeze thaw ice etc. I have customers ask about it and recommend just paving it. Definitely cheaper!

@RehabLife 2 года назад

I thought I was the only one that did this. I've been told how it should never be done, but I did it anyway with great results. I've done this twice in the last 5 years. One was a 10x10 patio that was in the way of a much larger screened room. 12x24 poured over with a 2-1/2-3 inch overlay, bonded and pinned to prevent movement. The latest one was a 12x36 where an enclosed carport turned living space would flood if there was too much rain. That got a 5-6 inch overlay and the room was repurposed into a master suite with a full bath.

@karmendimas5274 2 года назад

lol, thats what happens when you listen to so called experts!! lol, there is nothing wrong with what you did, good job!

@dogwoodtales Год назад

Good video and nicely done! I have a basement floor that I need to level, about 1/3 of the basement or more. One area will become bedrooms so I guess I could install the baseplates first 1 or 2 boards thick (along one side as a form then using the existing block walls as the rest of the form) but I’d have to slope that down to the doorways so one doesn’t have to step up into the rooms so high. So I guess I’ll need a bonding agent throughout the entire area being no more than 3” thick throughout. Your thoughts? Thanks

@kalicoschopshop 2 года назад

This is a great video! I own a house built in 1970 and the street is higher then the garage. Every time it rains I get about 2" of water by that bay doors and about a half inch by the back door. I wanted to know if this was even possible to lift the floor level, thanks for sharing your skills and knowledge!!!

@dwaynes5983 2 года назад

Best way is put a drain in with a pump. I just did major work on drainage to keep basement dry.

@samstanley2847 2 года назад

I was having a similar problem but what I did was put in channel drains and its done what I wanted.

@papaalan1765 8 месяцев назад

Thanks as always for the videos. Question: When pouring/adding concrete over old concrete, what about bonding issues? I've heard to use acid wash, clean, dampen first etc.?

@Z-Bart 2 года назад

My floor was a candidate until you said, "big cracks and settling" I hate the thought of jackhammering out the existing, but in all reality, it's the only way to go. Thanks for the info.

@mikeznel6048 2 года назад

Definitely gotta bust up the old floor first. What a shame, and waste of time, effort and money, to pour new concrete over nasty shifting broken up existing concrete.

@truth7416 2 года назад

Thanks. I have a question. Can you put infloor water heating in a 3 inch floor over concrete?

@ConcreteFloorSolutions 2 года назад

I have run into many jobs that the cracks projected through the topping. I don't know if you run into that or not.

@micahbrandner6647 2 года назад

Floor drain great idea although some local code requires a grease trap and it is far more $

@713picklehead 2 года назад

It is settling. As usual the middle holds up and the backfill is settling!

@brianbirtcher431 2 года назад

I've done that to a sidewalk that has turned into gravel. It's worked well for 30 years now

@4legdfishman 2 года назад

Nice work. I am a DIY guy and sometimes I bite off more than I can chew. 😂 My first and only attempt at pouring a floor was my garage build back in 2005. It looked okay until I checked to see if it was level. It was not. Unfortunately, the slope was a 1.5" drop to the back of my garage. My son had some, Quikrete High performance cement floor resurfacer he wasn't using. I wasn't sure if this would work pouring up 2" thick and tapering down to zero. Do you have any product preference for this? Thanks! By the way, I'm right here in Maine and a proud owner of one of your bright orange t-shirts! Just got it last week.

@joeconner2669 2 года назад

We do this all in my state.

@Oldvolks44 2 года назад

Mike can you do a video (scenarios) where you would use Weld Crete so folks can get familiar with this product. This stuff is amazing. I use it on cold butt joints, applying new to old concrete and predominantly on all of my door and window replacement where we have stucco patch work. I have found this to be a great bonding agent. I have used this to float cement all on sidewalks that have lifted, cracked or just had huge holes on city sidewalks. Come back years later and the cement all is still in place.

@lolnitrous1179 2 года назад

Yes sir

@rockford8915 2 года назад

Hi Mike, I have an existing two car garage that I will be expanding to a six car garage. I will be adding one additional bay to the side, and then going back to make the whole garage two bays deep. The current two car slab is in good shape but a little out of level after 65 years. Is it a good idea to go over the existing two car slab like in this video, and then add all new concrete to the four new bays being added, or is it better to break out the old slab since two-thirds of the concrete will be all new based on the four bays being added? Thank you in advance for the reply.

@mitchsteinwedel9268 2 года назад

I got a 12 x 20 full concrete block wall garage. The pad is pretty cracked and I was going to do conc over conc. I raised the grade in the yard so I already raised the back man door and poured a new curb. When i did that I busted out a bit of conc already (6" thick) and noticed there is no rebar/ mesh in the existing slab. I have no problem bonding the surface but with the sub base not being super sound would you recommend busting out the concrete? Trying to keep costs low as I didn't plan on doing much to the garage in the first place as there are some settlement cracks in the block wall from there being no poured footing.

@mrmyth5846 2 года назад

Was wondering if this could be done and hold up. Just stumbled on to it. I have old settling in a two stall carport with plenty of height to raise the floor.

@Agnemons 2 года назад

Heavy engineering workshops often have a dual concrete floor. With the top layer being a sacrificial layer that can be replaced relatively easily (just break it out and replace with new)

@captainobvious5349 2 года назад

Yea and they also use structural reinforcement and tie the 2 together. This is cheap and will fail within a year.

@lambbolt 2 года назад

@@captainobvious5349 you cleary didnt watch the whole video.

@marvinturnmire7406 2 года назад

@@lambbolt he sounds more like Captain Oblivious to me.

@johnwarwick4105 2 года назад

You are not parking earth movers on it 🤣

@captainobvious5349 2 года назад

@@marvinturnmire7406 What part of the video does he tie them in or even use dowels? I obviously missed that part. Oh wait, maybe the where he just says you don't have to? Would love to see his P.E License in structural engineering,and you and your boyfriends for that matter.

@anthonymauger9388 2 года назад

Nice work , answed a question ,

@djcross60 2 года назад

Hey I want to put new concert on old concert . that have paint on... what should I do before

@thomaswaldorf9141 2 года назад

This works great. But i hope the bottom plates for walls was thought about.

@christopherbonanno1120 2 года назад

No different then just pouring new concrete on stone sand dirt. Etc. Will be just fine. I love how everyone on the internet is a master of all crafts they see. On RU-vid.

@The.Real.Reaper 2 года назад

What about the existing drywall & wood framing that may be lower than the new level of concrete pour? Won't NOT putting anything in between these porous materials & concrete allow excessive moisture from the all the concrete & ground wick up into them causing rout & possibly mold issues? I am considering this in both my garages built in 1934. One is a 20' x 12' single attached. The other is a 24' x 30' two car detached. But not above any existing framing without a moisture barrier of some kind, especially in the basement. I would also like to door a 3-4" with fiber reimenforced & the new fiberglass rebar reinforcement in all of them.

@jamesmayle3787 2 года назад

Intriguing. First I'm seeing this done. Also, that kick screeting is new. My dad says it makes the floor uneven though, so I'll probably never be allowed to try it.

@jaked964 2 года назад

How does kick screeding make it uneven, you’re screeding flat over where you walked lol

@jamesmayle3787 2 года назад

@@jaked964 he said something about the speed making it not as flat. Idk. It does look a lot waiver than the way he does it. I'd think the bull float would fix all that, but he's been doing it for his whole life, so idk. It could just be his ego getting in the way too tough. You know old people, been doing it the hard way 40+ years, so anything that makes them think they haven't been perfect all that time causes them to revert to two year old mentality. It's sad actually. I've discovered it's usually the elders that have the most fragile egos. You'd think telling them an easier way would make them happy, but they just get hurt they didn't think of it 20 years ago, then double down on their way.

@waynemensen4252 2 года назад

When you kick the hole closed, it could push under the float if you get carried away about it.

@t-bonebigears 3 месяца назад

Flooding garage old concrete is fine, no cracks just level with the driveway and street.

@henrybittle5234 2 года назад

Mike, I always put down a 6 mil plastic b4 I pour over old Crete, the rest I do like you and agree with all you said and did. I think it keeps the old cracks from coming up into the new concrete

@johnsmith8237 2 года назад

I agree on that my self but its what ive always been told from older guys. Maybe it was just a precaution they did in case lol

@713picklehead 2 года назад

All those cracks in the existing will come back through! This is a bad choice!

@thebrushhawg 2 года назад

So ive set tile over concrete with cracks and have coated the floor with an anti-fracture coating ( redguard or hydroban). Is that something you have considered? Do you think it may be beneficial or just an un-necessary expense?

@markwindover3375 3 месяца назад

I have a 24x34 garage two bays. It was built in 1975. Slightly higher in the center of the garage I think 1.5" than the back of the garage. I believe a 3" perimeter curb. I am getting water coming up I believe between the curb and the floor. There are some cracks in the floor. Would you pour directly over and run it right up to the top of the curb?

@garymaillot9715 2 года назад

Great job, you guys make it look so easy to do,but you guys have 1000’s of hours to master this, props to you guys , but dam it’s got to be hard on your backs!

@davidromano1154 2 года назад

⁸

@desifrazier6860 2 года назад

Oh I put some concrete adhesive product into the mix and on old concrete after I pressured wash it

@tomruth9487 2 года назад

Is that center post between the two doors a problem? Looks like you're surrounding the wood framing with concrete?

@skliros9235 2 года назад

Hi Tia! 👋

@christopherpelkey82 2 года назад

Hey Mike. I have this exact issue. This looks like the exact fix I need. Can you work in Hampden? (Just outside of Bangor.) Thanks!!

@tomf9292 2 года назад

Mike, do you work in the Bellingham Ma area?

@kolequandahl4466 2 года назад

would plastic under the new floor help stop the old floor cracks from reflecting thru new floor?

@ski7470 2 года назад

Did you have to put any barrier around the outside where the concrete butts against the walls?

@elplevonrooo395 2 года назад

How did the garage doors work out? It seems to me the opening shrunk by 5 inches. Berried the track in the Concreat? Do the garage door need to be replaced?

@kinguser8009 2 года назад

I was thinking of raising the deep end of a pool by 2 feet (that being the center which is 8 feet). I would install a 2 foot riser for the drain) . I would then fill the deep end (center) with sand, then pour a 4 inch slab in the entire bottom, thereby raising the pool bottom by 4 inches around it's entire inside perimeter, in addition to the 2 feet I desire in the center. 1. Does this sound feasible? 2. If so, what psi concrete would one use? 3. Would you mesh and/or rebar the concrete pour? This is an existing ingrown concrete pool whose bottom is breaking up a bit, but still holds water just fine.....thanks for your opinion

@benjaminkline4855 2 года назад

24x32 split down the middle about 8" drop on one side. The whole thing is below grade due to an over eager excavator putting in n new septic. Slab has no footing. Thought about jacking slab, or just under pinning it it little by little then a fresh 5" over top of the old 4"

@garylong7096 2 года назад

Nice work. Code in pa. Fire stop between concrete floor and framing.

@jimz.438 2 года назад

HI Mike. This is my first video I've watched and I just subscribed. I know you weren't concerned about the cracks in the existing slab. What are the chances of a crack telegraphing up in the new slab? What is your experience in telegraphing cracks without any kind of bond breaker?

@MikeDayConcrete 2 года назад

They could if the cracks are still active, or moving. We felt this one was OK

@normankaster917 2 года назад

When you do the saw cuts are you going all the way through the old

@nathanhaugen523 Год назад

Thinking of cementing over an old cracked floor in an old garage redo. Found video searching. 26X24. We would lay 4 inches of cement over the old. Ever look at pictures of the floors to recommend? ND here.

@davespinola3076 2 года назад

Can you cover a floor that has bad spalling issue? No cracks just spalling

@shitloveaduck 2 года назад

Those cracks in the old concrete are likely to come back. The old floor has heaved. It likely took decades for that to happen, so the settling is basically done. Maybe redirecting the water will help. Of course that one corner was lower than the middle. It’s too much to have been level when new. The middle had heaved. I have never seen this work out if you don’t mind the cracks coming back. Budget is always a factor so it is likely wayyy better than digging down out front and creating a steeper drive. The product used here was a much higher quality concrete than the old stuff, that’s for sure. Having been a farmer/rancher, there are an awful lot of cheap repairs attempted so I have seen this done over seriously broken concrete and of course those failed, but some have been done over apparently stable concrete with minor cracks. They came back. All of these floors were used in shops or Quonsets where heavier equipment was parked in. That may have been a factor, but the concrete poured was usually 6 inches vs 3-4, and all those floors had rebar or wire mesh. I did one myself and after 2 years it was cracked. It did stay level to the grade we created in it. It sloped to a drain. If we were to slope to the doors we would always have frozen doors in the winter. The shop was heated, but when it’s minus 40 outside the first few inches of concrete into the shop is frozen, regardless. That’s why the doors freeze as well. Also one shop always had a feed wagon in there, later a feed truck, that had a load of feed on for the morning so we could gain a few minutes at the feed bunks. Always easier to add those few minutes at the end of the day, rather than to the first thing in the morning. The guys liked it so I was ok with it. That load of sileage added a ton of moisture to the air as well the whole unit would thaw from gaining all the snow and frost from being operated in the weather the last feeding. All my garages and shops have a drain. Just to make life a little easier.

@Irideonandon Год назад

If you pour a non-bonded 5 inch thick overlay and use some rebar, it does not transfer the cracks and problems from the original floor. It can easily hold your car weight no matter what the original floor does.

@ibisman1593 2 года назад

Mike Day Concrete What is fiber mesh ? please

@dannystubblefield5478 2 года назад

My current bay sweats - could I pour over it and use something to stop the sweating?

@truecowboy 2 года назад

My garage floor is settled in far left corner bad slop downward. Other parts are cracked one spot about 3 feet in diameter is completely sunk in n broke. The garage is one in a half car garage. One plus is when original floor was poured they poured roughly a twelve inch high lip all the way around. If I put rebarb down could I pour over instead of ripping out?

@chazdavis7942 Год назад

I’ve got a 1,000 sq ft garage I’m considering doing this in. Had a contractor recommend pouring over like this. The majority of the floor is in great shape, however the back corner has sunk about 3-4 inches, and produced a 3/4 inch crack about 10 feet long with the edges of the crack being about 1/2 inch off flush. That’s just one corner though, any other cracks or issues are small and not concerning. It seems that the slab has stopped settling, and many years ago (slab is probably 20 some odd years old). Do you think that sounds like a good candidate for a pour-over? The contractor did, and ge said he would pour it about 4 inches thick, bond it, and use fiberglass rebar. I’d love to have it done cheaper than the 5K quoted, but also want it done right.

@mkach48 2 года назад

Is an additive put in the concrete to help it dry because there's only one way for the water to go except up?

@davidprins9401 2 года назад

Can’t seem to find the sealing video you mention was pending. Let me know if I missed it!

@professorkaos2781 2 года назад

now its clear to me why the original concrete pour ALWAYS needs final touches with dry pack cement by the tile guys. Somtimes its part of the contract but many times its not. This is a great method if being generally "in the ball park" so to speak is good enough for the finishing work (if there is any) but no doubt working in this way is great for a painted concrete floor but not for tile.

@jimh2061 2 года назад

No grade pins or stakes? You guys are good.

@mikeznel6048 2 года назад

With a 10 foot straight edge in that small of an area, you don't need grade stacks in the center.

@geckoproductions4128 7 месяцев назад

20x30 foot pad. Mud got away from installer (my son) and left sound, but VERY rough surface, 6" thick. Probably an inch or so "roughness." Hate to jack hammer it out. Can I use your technique to salvage the surface of the pad?

@easymonee5964 4 месяца назад

Do you need to put plastic down 1st so it don't sweat if you turning garage into a living room

@jl7kicks Год назад

Do you recommend the customer to hose the new slab down periodically after your done?

@boonehelm7271 2 года назад

This garage floor looked pretty clean. But what would be needed if this was an old greasy shop floor. Muriatic acid? Just TSP?

@monikamccartney7096 2 года назад

Hi there. We've been watching your videos for some time in anticipation of pouring our garage next year. Your invitation to ask questions may be regretted. Haha. So if I have a dirt floor basement with a 6'x8' pad, would I have to demolish the pad to pour the remaining area? Or would a separation of some kind be required. The hot water heater sits on the pad, thus the hesitation. The only other option would be if we get brave and decide to dig down to increase head space.

@nicholasdix5598 2 года назад

Have seen some one in Michigan dig two feet and poured a new floor only problem he ran into was a stone pier in the middle but he sealed stone made a liquor stand for behind his bar good luck

@davidvillafranco5590 7 дней назад

I'm curious how you went about lifting the garage, otherwise very informative, thank you

@xtrasharp396 2 года назад

I have a 40'x40' garage i have hoists in the garage id like to put in floor heat and pour over the exsiting floor the current floor is in good shape. how would you do it ?

@richrichie7911 Год назад

What is the minimum thickness ? Does it apply to outdoor driveways too?

@Xpert2077 Год назад

I need to do the same thing to one. What is the rough cost on something like that? It's almost the exact same size.

@emilydill9357 2 года назад

Can this be done on a concrete pad that has cracked badly? The garage floor is good, but the pad in front is a mess.

@phillipsmith1847 2 года назад

Mike, got a concrete driveway that has sunk, but is now not sinking anymore. Seems to have stabilized. Would you pour concrete over that?

@speedokoterefinishnetwork4937 2 года назад

Mike just curious , why not do a 1/2" skim coat of concrete resurfacer or "self leveling" concrete? Commonly used for old beat up pitted concrete to give a fresh look . I want your opinion

@spooge33 2 года назад

Fresh look wasn't the goal, their was a drainage issue.

@cariday4501 2 года назад

I have a new 286 sq ft workshop with a 5" thick concrete slab. The 'contractor' did a decent job with leveling, but it is not smooth at all. Is there a technique to skim or overlay an existing concrete slab just to smooth it out?

@billv6813 Год назад

Hi Mike, I have a building in Rockland Maine that is 26 x 50, I have put down insulation and radiant heat tube. I was wondering if you work in the Rockland Maine area? Thanks This is an existing building. Thanks

@larrywarren1049 Год назад

Got a pad that had a garage built on it and caught on fire burning structure to the slab. Slab doesn't look to affected aside from the pits in it that would keep you from rolling around on a creeper and maybe small chunks here n there but off the top of my head @6" slab and 30 x 30 square that we want to add another @10' on one side for a lift to be installed is why i came looking 4 these vids and yours is the 1st ive watched seems simple enough but hindsight should i tear up old slab or something like this be good without worrying about cracks say the next 20 years will be used as a shop for older car collection but also a garage to a couple 3/4 ton and dually trucks

@MikeDayConcrete Год назад

You can pour over the old slab, 3" thick or more would be best.