Pro tip, set your shop vac for wet pick up, fill it 1/5-1/4 full of water and it will catch dust better then any filter

Hi Nils. You need a Quick Saw. Try renting one from the Home Depot next time you need to cut concrete. You can pull the cutout out in one solid piece and not have to resort to a sledge to finish the job. I've cut concrete with a Skilsaw before, and there is no comparison. The only consideration would be the fumes from running the engine in your basement.

I run my hypoid gear Skill Saw with water when I use a diamond blade on concrete or stone. The blades last lots longer and that dust is not thrown all over the place. The saw came set up for cutting stone veneer when I bought it used 24 years ago, and the saw is still running fine.

I used Google Sketchup. It's free, pretty easy to learn and I used it to architect my whole basement before building it. As you'll see in the next video, I didn't end up following the plumbing plan I showed in this video because there was an easier way, but it helped me to visualize how to get to where I wanted. Thanks for watching!

the placement of the wetdry vac is absolutely genius. man, youre a smart guy haha.

You saved money but done it the hard way. Cut the Cement with a Cement Saw and break up with an Electric Jack hammer, the small one comes in a Carry Case. Home depot rents the Electric Jack Hammer for $40 @ 4 hours or $60 for 24 hours the Bits are $3 for 24 hours. The Cement Saw rents for approx. $40 plus $10 blade. Basically you will spend between $80 - $100. Cut the Cement into the square you desire then cut and 'X' into the Cement square to create smaller sections to break up and pull out the old cement, it will make the job much easier. Use vacuum for inside jobs to suck the dust and for outside jobs vacuum not really necessary. Hope this helps.

Thanks for sharing. Just wondering if that diamond blade is some special type that doesn't require water to keep the blade cool when cutting. When the blade gets to hot (friction) the glue that adheres the diamonds to the blade lets go and the blade gets dull pretty quick.

Nice video! Great idea setting up the shop vac. I'm not doing anything as complex as plumbing, but we have a bit of a problem with water seeping into our basement, and am trying to direct the water (for now anyway) to a drain, but it is piling up in an area about 2 - 3 feet from the drain, meaning there's a high spot that needs to be brought down a bit (probably 1/2" would do it).

I just uploaded the next video (finally) - check out the end of this video for the link.

Nice job! Thx for sharing. You guys are tough doing that without a chipping hammer.

Nils you done a good job and shared your work, the thanks goes to you. The rented tools just make things easier and quicker. Take care.

Could you have made several cuts across the huge area to break up the parts in the middle of that rectangular more easily?

Wonderful video. Can't wait to see the follow-up. I'm in the process of enlarging the hole through my basement wall, to accommodate a larger drain pipe.

I realize this is an older video but to save yourself some hammering, a good sized masonry bit in a hammer drill to put a hole every 4-5 inches would have done wonders. Good video though, got me what I needed to know.

Don't do this without having the concrete x-rayed for utilities. This exact scenario is why I do not do residential remodeling anymore. I worked for a contractor that asked me to use a demo saw to cut through the slab of a 3 story condo building and he assured me that there was no electrical lines running through the slab. I ran the demo saw with a normal drip 3-3/4' deep to make the scoring line then I brought out the 60 pound chipping hammer. After about 30 minutes of chipping I hit a 200 amp main and 1-1/4" of the hardened steel chipping bit turned into molten steel and shot straight up in front of my face and hit the ceiling in an explosion of sparks and slag. It turns out that when I was running the demo saw I had cut almost half way through six, 200 amp, unit mains. I was standing in water ungrounded the entire time. I could have died X times that day. Don't cut into slabs without knowledge please.

I have to do the same thing...thanks for the video..very simple...I do have a small cold chisel and small BFH, the little one..and that will come in handy...love the vacuum idea...

Drill a couple of holes in the cut block. Get a mason art chisel will help

Nice Work .....only people want to know ....understanding what you do

Great job man I'm a plumber and I understand how much that sucked lol. My only comment isn't the work just that you did. Because it came out great, just you could of saved time and energy with an electric chipping hammer. But there's no right or wrong way brother just different effort levels on this one lol

I'm not sure, but I didn't see any tendons or cables so I'm assuming it is not.

I just used a regular (cheapest I could find) blade. I tried water at first but that just seemed to make things more difficult. Maybe it only worked because I had such a relatively small amount of cutting to do.

Someone buy this man some gloves

One or two more cuts down the middle would've made busting the concrete easier. The concrete would've hinged at the middle cuts and at the edges, thereby breaking easier.

I've done it both ways, hammer and jackhammer. All I can say is I'll never not use a jackhammer ever again. Well worth the price of rental.

If you put the front of the saw down first and then lower the back its easier to dig in.

Could you be so kind to give me a general idea of what a contractor would charge to cut a rough opening doorway through concrete block (garage location.. +no extra care for cleanliness, and I would install the new door...any information, much appreciated!

no mention of post tension slab which is what I have. Need to xray for cables before cutting.

Does everybody have that one *muscle* neighbor they call in for backup? *I do.*

In the scene where you're breaking out the second section of concrete, I thought I was looking at your neighbor using the sludge. I saw his "grey" hair and thought, wow that's an old guy! Then I realized it was you with concrete dust in your hair, lol. But you were slugging it hard 😅.

Concrete seems are lot harder than the concrete they have today?

When you refill the hole with concrete, do you put rebar in the sides of the hole?

This looks like the hard way

It’s always best to do concrete work ungloved and wearing a fine wrist watch and ring!

I went through the same situation and I started breaking the concrete with a sledge hammer, until I discovered I could rent an electric small jackhammer for $20, best money ever spent, easy to use and a great way to save yoiur energy for something else...........

If you hate the dirt, you can try spray water when you cuttingn

You also needed to chase it with a *chisel* , Buddy... What's his name? Mike or Dennis? LOL - 5:49

i'm no stranger to construction/home repair, and imo the performance of your skillsaw and blade is nothing short of remarkable please include a link to the blade you say you found at hd....i went there but didn't find anything close to it. there was a $60 Diablo diamond tip blade but you said you spent $15 thanks

I am doing the same project. Thanks for the vid! I want to see the plumbing next!

That circular saw went deeper than i thought it could

I have to do this next week but I am renting a jack hammer from Home Depot. I dont have a neighbor to help :-) I have to make a cut double of what you did.

Does anyone know the disadvantage of cutting concrete with the dust and potentially inhaling the concrete dust? Are you better of tunneling under the slab instead?

Good Safety Practice

Heck with renting the proper tools. Buy them on Craigslist and then turn around and sell them for the same price.

How do I know how deep your blade should cut?

Roughly how much would this cost if you'd contracted this to be done?

Thanks for sharing. I'm putting in a check valve.

Oh boy! Looking at all that work to open up the floor makes me super happy I just bought the Milwaukee SDS MAX rotary hammer! I like the pre cut though to make a clean cut in the floor.... but the sledge hammer crap._ not for me anymore.... besides, one job, the first job will pay for the tool....

There's better ways to do much of this. But at the end of the day it worked I like to remind people.

That T intersection did you end up making that A Y intersection

Workin at night to dodge the inspector eh

I just did this. It sucked! Good video.

just did a similar project like this today...only a lot bigger. Instead of the sledgehammer....go rent a jackhammer. Alot easier.

Attila, I used Google Sketchup.

Better off renting an actual concrete saw than using a SkilSaw. The motor can handle it if you only cut 1/2” per pass and work really straight and slow, otherwise its a great way to drastically shorten the life of the motor. I have however cut 1” granite with mine and I know tile cutter use them with a water attachment. But cutting concrete.. and dry.. uhhh no.

That breaks out nice but why didn't you just shutter that shape in the first place so there was no concrete where the pipes were going to go.?

wow no rebar going through the concrete also i would recommend you use a angle grinder with a diamond tip disk it will not be as bulky to turn on those corners otherwise good job

Dust from Cured Concrete is really bad for you , must use a better mask , not a respirator just a mask with filters, also try to make it wet so is not airborne

The link below to the follow-up video is where?

Your connections are not to code! on the 3D video should be sweep Y's and 90s and 45s...not hard 90's

Not sure why a trap in the drain line was needed . And a combo tee/wye instead if the tee works a lot better and in some states a tee on it's side is illegal

your video is just fine. you could have used a smaller chipping gun it would have made life simple. also soak concrete with water to cut down on dust and help with heat on the blade.One thing i noticed is that waste lines for toilets have no trap. yours showed a trap. this will cause a blockage in the future. all toilet have built in traps. 30 years in the business.

making more cuts in the middle would have made breaking out that concrete easier.

Nice Keens.

How do I saw through concrete that's thicker than this ?

Lmao I admit this video gets me anxious over how he plunge cuts. Never lift the front edge of the table up when plunge cutting

i see dirt underneat , do they use post tension systems at ground level?

I thought they put rebar in those foundations?

Your neighbor "with the muscles", looks like he could be your grandfather...you might wanna go lift weights with him or something...great video either way, very helpful :)

How did the Skil handle the heat from the blade? Did you need to let it rest at all? Pretty impressive really.

Looks like a two inch thick slab with no mesh......Tell me how to do a tight for space 8 inch thick slab in an existing bathroom...…………?

i cant believe that saw made it.

just use water its way cheaper and will stop all the dust and dangers not just from the guy cutting it but everyone else in the house

Am I the only one who noticed he never exposed any plumbing whatsoever in which to tie into? At 5:36 he imagines there will be pluming to tie into, but by the vids end, it shows there is only dirt where he thought there would be plumbing.

That was great thx

Hello: I have a question. What software did you use for the piping 3D simulation? thanks

Electric jackhammers are a thing😉

Cold chisle

Should have used a combo instead of a tee. Nice cut work though.

I would have used a tool to dig that out and some water

Bathroom for new house

much easier to over cut it by 4" and remove in larger chunks........

Way too much work. Jackhammer, hepa filter. Would have liked to see the hookup phase. Good video, thanks for the share.

Just found out my sewer line is encased in a 36" solid block.... What now???

I am surprised no one made a comment of how he will probably get silicosis from wearing a $1 dust mask during this whole operation....

Can somebody give me a link to how we put the concrete back over a pipe 🙃 for some reason I can't seem to find a vid for it

Should be wye not tee connections. Imagine flow and also using a snake?

What kind of blade die you use to cut the concrete. Was it a standard diamond blade or something more heavy duty?

nice what kind of blade is that and where did you buy it from? I need to do cut the slab in my garage

Seems like a lot of work. I just buy empty paint cans from Home Depot and shit in them. Seal them up and throw them out.

Working in your Google T shirt

I got one word for you... jack hammer

Wow, you literally have no rebar in that foundation... How's that even considered safe?

Damn ypu lucky that slab is not thick

What blade did you use? I want to pick up the same one. I used a 3 dollar blade today that didn't work very well

Ur going to cut ur fingers off it looks like . Ur holding front of the saw with left hand . I was going to use my boyfriend's but I'm scared how to hold it. It looks like the saw is by ur fingers

What program did you use

In local house

Jackhammer!

thank you for the video.dont mind the trolls ;)

Jackhammer next time youngster