Pouring New Concrete Over Existing Concrete Floor | Watch This First!
HTML-код
- Опубликовано: 10 окт 2019
- #pouringconcreteoverconcrete #bondconcretetoconcrete #mikedayconcrete
In this video I'm pouring a new concrete floor over an existing concrete floor.
If you want to know if there's anything special you have to do before pouring concrete over concrete, I show you and explain it all in the video.
My rule of thumb is: If your pouring at least 3" thick or more over your existing concrete floor, patio, slab, driveway, you don't have to bond the concrete together.
If your concrete pour is less than 3" thick, then I recommend using a bonding agent like Weld Crete to bond the two concrete slabs together.
If you're using Weld Crete, just brush it on your clean concrete, scrub it in and make sure it covers everything, wait for it to dry to touch, then pour your new concrete right over it.
If you're slab is thicker than 3", then you just pour the concrete like you would any normal slab, floor, or patio.
This is how I've been doing it for over 39 years with no problems.
GET WELD-CRETE HERE:
amzn.to/35lRNwY
MY CONCRETE SLAB COURSE:
mike-day.mykajabi.com/pl/79570
VISIT MY WEBSITE:
www.everything-about-concrete...
USE THE SAME TOOLS I DO:
SPECIAL DEAL: Use Coupon Code EAC on all equipment and tools bought from Marshalltown's website and get 10% off the price plus FREE SHIPPING!!
MARSHALLTOWN POWER TROWELS:
marshalltown.com/power-trowels
MARSHALLTOWN SHOCKWAVE VIBRA-SCREED:
marshalltown.com/concrete-sho...
MARSHALLTOWN CONCRETE TOOLS:
marshalltown.com/concrete
TOPCON LASER LEVEL:
amzn.to/2VrJ3zV
DEWALT PENCIL VIBRATOR TOOL:
amzn.to/2Km5Zis
INVERTER GENERATOR LIKE WE USE:
amzn.to/2XfWfwe
BULLFLOAT:
amzn.to/2U1Kx2F
HAND FINISHING KNEE BOARDS:
amzn.to/2TZmTUj
MAG FLOAT & STEEL TROWEL SET:
amzn.to/2IgmDOq
2" MARGIN TROWEL:
amzn.to/2G33KNn
CONCRETE PLACER OR KUMALONG:
amzn.to/2I00gxp
CONCRETE FINISHING BROOM:
amzn.to/2UytU2B
CONCRETE SCREED:
amzn.to/2WZxtwm
CONCRETE EDGER:
amzn.to/2GbGkEp
CONCRETE GROOVER:
amzn.to/2PaL414
BOSCH HAMMER DRILL:
amzn.to/31AHnaN
MY RECOMMENDED TOOLS PAGE:
www.everything-about-concrete...
SUBSCRIBE to my email list and get my FREE video guide on how to get the perfect broom finish on a concrete patio:
forms.aweber.com/form/44/2003...
Follow me on Twitter:
/ creteexpert
Follow me on Instagram:
everything_...
Follow my Facebook Page:
/ everythingaboutconcrete 
Хобби
I started to remove 15t of concrete. I got 2t done then watched this video. Im going 100mm of new concrete so I'm keeping the existing concrete below. Thanks for saving me time and money. I need to stop listening to my old neighbours advice.
OMG❗️same
Lppl
How has this held up?
@@Jdeneik i went 130mm thick. Not a crack in it. Used decent steel reinforcement
Love watching people doing an honest days work. Im way too lazy to, so this gives me the satisfaction of seeing a job through with minimal effort on my behalf! RUclips is great for giving your business/brand a great reputation. your work speaks for itself!.
These garage floor videos have answered all my questions on pouring over old garage slab
My 20x25 ish two car garage was poured in about 1970- very little cracking, no heaving or elevation changes just chipped surface and bad sloping towards the back wall.
Thanks Mike!!
I've been watching your videos quite a bit Mike. I'm learning a lot, and my wife and I are about to fill in our 70's style sunken living room. Our first pour was a concrete counter top in the kitchen. It came out nice. The way you narrate your videos really helps me to understand key points! Thanks so much!
Hey Mike, ive watched alot of your videos...your videos are my go-to videos for anything concrete. Thanks alot and keep up the amazing work.
Great video. I really appreciate it when content producers can get to the point quickly and effectively. It's great skill to have. Much appreciated
Perfect, this answered all the questions I had for a reno project I'm currently designing. Thank you. 🙏🏼
Thank you Mike for the good information. Love to watch and listen.
Answered all my questions. Thank you, now I'm comfortable pouring over an existing patio in the rear of my home.
Thanks for showing and explaining how pour a new concrete pad on top of the existing... including the size of thickness which that was my main concern. Bonding a 2" pad garage floor is what I'm doing for a friend of mine. Your tips are good.
All you're videos are good for the knowledge bank. I worked with guys not willing to train and wont answer simple questions that you explain with ease.
And yes, these videos help a LOT!!! Love them, great work!
Thanks, glad I can help!
Your video just gave me a little more confidence on my decision to pour concrete over my existing garage floor. My floor is lower than the sidewalk and alley so I always have sitting water when it rains/snows. I wanted to do small rebar and raise it about 4-5 inches with high psi concrete. I was on the right track, just didn’t know if it’s something people normally do. Thank you so much! I’ll definitely look into that course.
Best!
I just started doing concrete and your videos have helped me become a finisher in a couple of months!!! Ty your a awesome Teacher and Contractor!!!
Sydney, thanks for that! I'm glad I could help you. Where are you from?
Video helped answer if poring over existing concrete is possible. Going to be pouring over a sidewalk come spring. Great video great information
Sooo happy this popped up in my feed. I have a shed that the Amish used as a run in for horses. The floor is sloped at least 6 inches and I need to level it out. Great information! Thank you
Thanks Mike. I was wondering if I could pour over my old tore up patio. Now I know thanks again man.
Let me know how it comes out!
This video was really helpful, my garage floor is uneven and cracked, now i k ow i can pour concrete on top of my existing one, thankyou for your videos they are all awesome
You cover it well, enjoyed listening. Most helpful. I hope on planning concrete on old sidewalk cement.
Great
Great video. Helped me to decide what I needed to do to fix a seriously messed up concrete job I paid for.
I've been looking for this video for 3 months.... good information
Thanks for the weldcrete recommendation!!
Thanks for this video. Very helpful because I'm working to pour over our existing concrete basketball court in American Samoa.
I learned a lot from you. I’m enclosing my back porch to make it a sun room and need to raise it 3 to 5 inches, level with the existing home floor. Thanks for the help.
I have a garage floor with the wrong pitch. Thanks for this video. It had answers to all the questions I had that I couldn’t find answers to anywhere else.
I am considering pouring a new patio surface over an existing patio. I am not sure I have 3 inches to use for the new slab. So, the video was very helpful. Thank you.
Glad to learn about the idea of the downward slope at the door end.
Thx for example! Have a covered, roofed, screened in patio in back looking to close in for increased footage to house. Must bring floor up to level with inside so there's no step-down issue. Will study this more before tackling, but you answered my main concerns for bonding, thickness, etc... . Thx again!
Great help, just what I needed to know. I have an old existing driveway that's now going to be a outdoor living area. My pour will be at least 4"s thick.
gonna be doing this for a sun room. This is perfect. Thanks!
Thank you..very helpful.
Thanks for sharing brother!
Thanks. I’m building up the porch of my moms front door. 2’x4’ about 2” thick. Glad I learned about bombing the top to the existing concrete.
Thanks mike, concrete is the mortar that holds civilization together..
Good info. Two contractors that came out told me I have to dig the existing floor. well I found this video in addition to a very length document about the whole process of pouring over concrete put out by the concrete association of America. I am thinking about doing myself after watching how easy you made it look.
Thank you! I have a covered porch with an existing few slabs, 2 of them ( made that way when house new, we dont like it ) are tapered 4 inches lower than the rest and we wanted to make them all even now I know I dont have to remove the old ones ! You will have Saved me a ton of work/money I appreciate you !
Glad I could help!
Thank you. Great info especially early on in the video.
Great work sir 🙌🏽
thanks.. I have a patio on the back side of my garage and it didn't have enough to fill evenly last year. I want to learn more, I have a mixer and love the DIY projects, especially to do things right the first time.. Thanks so much..
Great vid, pouring over a small barn floor. can raise about 4"and now I know I don't have to hammer out the old slab. Thanks!
New shop on old slab here. Loved watching this!
I have a patio that looks like the previous owners added to twice. The main portion has a low spot right near the back door, so water will sit there & in NC we get rain well into winter AND spring. The drain holes are at the end of the patio, but the water never reaches them, lol! I had asked 2 diff contractors about putting concrete over it to correct the previous DIY. Both gave diff answers, but both said you couldn't do it at all. I knew they were wrong, but I needed the technical info like this video! You're awesome! Now, I can price it out to see if it will be worth doing myself or if I should hire a concrete company. Thank you so much for sharing this!
Thanks! Yeah - I can do this!
Man you guys have a great system
Def helped knowing this now thanks
Your video was very informative. have to pour over existing basement floor. have the ability to pour it at 4". Glad to know we won't have to take out old floor.
Thank you for the video. Appreciate it
Love the video. Thank you. Shared it with friends.
Ya! Thanks..all the construction here on Guam is all concrete. Our house floor is not level and now thanks to you we have our solution....thanks!
That is awesome!
Great info thanks
Thank you.
I poured a new slab 24x36 with a 12” thicken edge. Two and half trucks. All were supposed to have 1% calcium. Only the last load was mixed properly and cured out about noon. The rest was curing about 5pm to power trowel. Top layer froze that night now I need to pour a new one or pour over this one. Your video helped me a lot.
Thank you 🙏 God bless you this was an answer to my prayers
Hey Mike, I been searching for some ideas on a task that involves pouring over a 21'x22' cement floor garage, but I wanted to raise it by about a foot. Also, have thought about expanding the length to about 28'-30' which would mean adding to the floor. That makes it a bit complicated, so still thinking about it.
Your videos are outstanding and your willingness to share your techniques and include advice is a rarity these days, so thanks for that. I am a DIYer and appreciate any ideas.
Want to pour over patio for room addition 3” to 5”. Thanks for the video!
Very good information! I have a patio with Spanish tile on it and want to take it off and do some sort of stamp or something nice, and then add a new patio to it so it is one patio. I also have a section of sidewalk that is showing the aggregate.
Thank you for your video and sharing your wisdom. I have an addition on a slab, connected to a modular home. Obviously the main part of the house is about three feet higher floor level. On the West Wall of the downstairs room , we have had water issues from under the door and some of the wall. I'm not sure if any kind of wrap or seal or even liquid nails under the sill plate. We recently had a porch added on extending 12 ft out front thinking we wanted this anyway, it should take care of the problem. I noticed that the contractor I used did not grade the new slab at all and Mom the water runs towards the wall and not away from it. Now once again I have water coming under the door and wall. I'm not sure how much I can add without getting above the floor level so if it ends up being two or three inches that'd be great but I think I may only have an inch or so to play with, to be able to pour on top of the slab and correct the grade. My question is, am I looking at jackhammering out away from the rock exterior of the house, (yes rock, so it's not just cut and dried to remove the outer layer), and putting in a French drain or weeping tile, or is there another possibility? Thank you for your time. DB
Hi👋🏾, yes thanks for the "depth" info on adding my overlay. Also the added reminder on plastic for the moisture barrier. I have a decades old storeroom shed i'm transforming to a work shed. I'm also extending the floor plan a little. I've watched a million and one videos on pouring concrete. But not one on a proper deep overlay. THANKS ‼️♥️ all the way from Trinidad and Tobago. 🇹🇹👍🏽. Ps. I'm also planning and using old demolished bricks as filling on the extension section. Crushed up of course. Any tips on that❓
Good stuff mike!
Thanks Frank!!
Hi Mike, I have a sloped concrete slab on the side of the house. I need a level area to put a 12' x 8' shed on it. I'll use the weldcrete and make the shallowest end at least 1" inch thick, unless you think it should be more. Thanks for this great video!
I have a patio that I want to raise up and this helped a lot thanks!!!
Did you DIY your patio project? How did you raise it? I have a tiny patio that needs to be raised also. Thanks!
Yep. I used that weld concrete bond for my new front porch step remodeling. Now you can have a concrete lip of 2 inches so the garage doors don’t have to be changed. That’s much cheaper. My parents did that for their tool shed and stored their collector car and truck in there.
your a good dude
I have a small greenhouse attached to my house that has crumpled concrete and lots of open dirt. My home is 200 years old but I dont know when the first floor was put in but it was poorly done. TY for this video it was a big help!!
Glad it helped Janice!
Good info
Good video
Looks like you do good work
Thanks.
Great info on concrete. I’ve got a 24’ x 20’ Concrete slab that’s been out in the open for 7 years or so, it seems solid. Still has some anchors bolts in some areas, rusting away. I’m wanting to put a small weekend home. Question if I wanted to make it 2 story, how much concrete thickness would I need, and any special procedures. Thanks for your videos.
Good video, I am raising a floor of my back porch to match my pool deck, so it will be thick then thinner as it get gets close to the pool. Still figuring this out.
Wish you were in Oklahoma.
Do usually ask questions on YT but you obviously know what you're doing when it comes to concrete.
Had a guy pour a huge patio on a hot September day a couple of years ago. Really really bad job. Concrete was setting up inside the trucks. Ended up with dips and puddle areas all over - just looked like crap. To compound the problem had another guy sell me on a thin-coat of (???) so he could stain it - was gypped by that guy too. Now I not only have dips and puddle areas but also the surface is chipping up... Ugh!
HELP PLEASE.
Thought about laying down 1/2-thick pavers, but after watching your video I'm think just three of inches of new concrete and having it stained.
Thank you in advance for any advice you can offer.
Very informative video, straight and to the point.
You can tell you guys are passionate about concrete! Too many cowboys out there.
Greetings from a German living in Panama. I was “bombarded” from all sides to use bonding agent here in Panama. Until now, nobody could explain to me why I never did see or hear about this except for preparing a floor to put tiles on in Germany. I am building a house in Panama. I poured a “kind of prefab” 3 inch concrete ceiling on top of my 1st level. So I used a bonding agent Lanco CB610 and put a 4 inch concrete slab on top of it. Watching this video now, would have saved me $100…. Well. Now I know I was right but with the bonding agent I am okay too. That’s when you start building in a different country and nobody can explain why you need to do this. Standard answer? “That’s what we do….”
Great video. ive been watching all your videos the past week. i have a 12x20 garage on a slab im ripping down and going to rebuild a 24x32 garage in its place. im hoping i can keep the existing concrete and pour the entire new floor over the existing.
I have to pour concrete over a concrete slab leaning back toward the foundation of a crawl space. Thank you for your video.
Great video! Just want to make sure my contractor is steering me in the right direction. I live in NC so the winters are mild, although we get plenty of freeze thaws. I had a 30 year old mortared brick walkway and when we removed the bricks we found a cement base that is at least 3 inches thick. The base is solid, no cracks. If we pour 3 inches of new concrete on top should we be fine? And how do you prepare the old concrete prior to the pour. Should it be pressure washed to remove all lose debris? Is wire optional or a must? Any other hints are greatly appreciated.
I absolutely Love all of your videos about concrete. I am 73 yrs of age and have an erosion project that I have planned. It is an area which the back yard is eroding into the creek and the bank has dropped approx. 3 feet in elevation and my plan is to place concrete to form a retaining wall level with the height of the lawn and let drainage spill over the wall into a concrete collection basin. At that point it is collected and routed into a 4 inch drain line which extends out over the bank to spill down into the center of the creek. The area is 20 feet wide and 8 feet in width (back up into my topsoil/grass lawn). I have purchased a Kushlan 6 cu.ft. electric mixer and re-bar for the footings which will surround the entire collection basin and plan to use galvanized cattle panel as remesh for the floor of the collection basin, with manual wiring ties to the re-bar in the retaining walls for total covering of the collection basin with steel with the marriage of #4 re-bar in the footings and the cattle panel being tied-in. Now.....my issue is that It is pretty large and since I will be doing the job solo, feel that I probably should place concrete in all of the footings using formwork, which surround the collection area, in a single day and then wait 10 to 14 days for the concrete to properly harden before going back and placing the concrete over the floor of the collection basin. My concern is whether the concrete I place 10 days later will bond to the walls/footings which have dried out by that time. I have seen you use Portland cement to get deteriorated driveways to patch and wonder if that might be the method to use for bonding, or use the bonding agent you recommend in this video? Sorry for the length of this comment, but I don't want to mess this job up. I have good handy man skills, but I am out of my league on this one.....but my yard is washing away without help.
Thanks a lot from Kazakhstan! I should do similar task
Hey Mike! Great video! I'm moving into a new house and I want to put a shed on an existing pad that is in pretty rough shape. I live in upstate NY so winters are pretty rough. I'm pretty sure the previous owners didn't dig deep enough before they poured the slab but I would rather not break it up and start over. Any suggestions?
Very helpful was wondering if I could pour on top of an existing slab 5x5 front entrance answered my question
Mike your video very interesting!!I could not find your video on forming up steps
It's right here: ruclips.net/video/YeCzqJPE6kc/видео.html
Let me know what you think!
Less than 3inches 👌 thank you pal
This is very interesting. I love the improvement and you really have a great work ethic about doing this correctly. I do have a question. I have an aggregate patio and I wonder can a similar treatment be done to lay concrete over that? I dislike the pebble surface of the aggregate and would love a smooth concrete surface.
How about a fresh mixture of 1 to 1 Portland cement and sand?
Hey Mike...I love your videos. I have a front porch of about 5x8' that was covered by 2 X 6 treated wood. The concrete slab is really badly crumbling on top. I will have to grind and chip it down to where its solid and then pour abouut 2" over the slab and add a 14-16" (half the height of the slab) step in the front of it. I know I will need some rebar support in the step because it will be about 6" high. I will drillin to the front of the slab to insert the re-bar. I will use weld crete on the old surface. I think I will watch your training video as well. I have never really worked with concrete but I am fairly comfortable with all kinds of renovations. I have been watching your videos for months knowing I have this project ahead of me. THANKS AGAIN!!
Watch a lot of your videos. Thank you for all the education.
If your used the bonding agent first, could you dry cement the new layer? I have some old steps, 3x3 feet with four steps and want to raise them 2-3 inches.
Thanks
Hey Mike, GREAT video! It looks like this may work for me. My garage floor has been cracked and settled for probably 35 years. It's cracked and settled anywhere from 2" in the center to as much as 6" around the perimeter. Kind of like large slabs broken off the center point. Can I go over this existing concrete situation? I'm also replacing the overhead door so I could pour even deeper (raise the door). What do you think? Thanks again for the video.
Hey Mike, Thanks for a great video! I have a 4" pad for a garage that never had a structure built on it. I want to expand the pad to go 3" over the old pad and make thickened edges outside of the old pad to support the structure (26'x32' with bonus room apartment on top). Old pad seems pretty stable, it has expansion joints and a couple long cracks but it is still nearly level. Does that sound doable to you if I support with re-bar and no bonding between pads?
Hey Mike, thanks for the video. It was very knowledge based. I am considering blowing out my interior wall that leads to my outside patio and turning the outside patio into the living space. I know I will need to add concrete and I was wondering if you can give any advice. The space is 13 x 7. Thank you very much in advance for taking the time to read this message.
Happy I found your channel. Learn something new. Will have to watch additional videos you posted just so I can ask the right question. I had to drill out the bathroom floor that was built on slab concrete. In Thailand they create a mud out of cement and sand with water which they lay down on concrete. They then put a mixture of cement and glue on the tile and add the same onto the mud before laying down the floor tile. A pipe (hot water pipe) leaked and destroyed the ceiling below. Now I wonder if I could add a new concrete layer on top in the bathroom? Or do I need to lay down a bonding agent? Thank you for your time.
You were enormously helpful, thank you. I have a 10 x 27 patio that is level with the dirt and the grass is constantly trying to grow over it. Additionally, the previous owners brought 10 feet of on end up, but never finished it. This has caused the newer concreat to break off in places. We want to remove the newer concrete and raise the whole pad by at least 3 inches. What is your take on that?
Thanks for the great instructional videos! Wondering what the surface looks like with embedded fibers? I'm not too crazy about little bits coming to the surface and showy a "hairy" look. Is that what happens?
Thank you. I learned a lot from your video. Looking to resurface an 88 sqft. concrete floor of a workspace added to my home. Aside from a bonding agent and fiber mesh type of concrete, what type of concrete would you recommend from a big box store? There are a lot of choices.
I'm pouring concrete over concrete in a basement and I want to pitch it in the middle going into the irrigation that I created because the basement floods Thank you for your video I did pick up a lot of pointers being that I'm pouring less than 3 in I did subscribe and I hope to continue watching your channel in the hopes of learning a whole lot more Thank you
Excellent video and informative and confirming. Just a thought about re-doing the OHD.....if height allows, cut off the bottom of the OHD and seal off....be it wood or metal.
Hi Mike, thank you for sharing! I'm curious if you have capped floors like this on concrete driveways? We had our driveway done in 2019 and unfortunately we had a bad job done and couldn't go after the guy without losing $. Would love to know if this is something we could consider doing to help level out the 20x40 "back lot" the leads into our garage. The concrete is super unlevel and gets puddles, and in the winter, it becomes an ice rink and very unsafe for my Grandparents who walk on it.
Recently we’ve had major rain fall in the bay area and I’m looking into changing the pitch of my walkway
Thanks, I was looking to get info on concrete over concrete. I smashed the like. My project is a garage similar to video. I've got 4-6" from front to back. COVID is making it hard to get contractors to the house and I need to do it myself at this point.
We've done many over the years just like this one.
Mike, Perfect time for me to see this video. I have a 6x6 thin metal shed on a 2 " think concrete slab that is in good shape. I want to make it a little bigger (6x8 or 8x10) with a 4" foundation, without removing the 6x6. The new shed will be wood. Can I do this if I use Weld Crete? Thanks for the video.
Hey Mike, Thank, great video. I have walkway with patio stones, can I pour concrete over it
Excellent Video! There are almost no resources online about concrete over concrete floors. Thank you.
I notice in this situation, the walls were raised on curbs. On would you do this in a garage where the walls go straight to the floor? Remove the walls or pour around them?
Trying to raise my carport 3.5 inches and close it in. But there is a laundry room built out there already.
Hey Mike love the video! I am going to remodel what was a 2 car garage into some extra bedrooms. There is about a 6 inch gap in floor from garage slab (in ok shape) to the finished floor of the house. The garage has cinder block walls. If I pour a slab on top of the old slab (thinking of leaving about 1 " difference so I can add a barrier then plywood for carpet) is there any risk to the new slab putting pressure on the existing cinder walls? Love the videos keep up the good work!