Building a Monolithic Slab Foundation | the (4) Most Important Steps
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- เผยแพร่เมื่อ 7 ต.ค. 2024
- We are building a Post and Beam heavy Timber framed wedding barn event space on a MONOLITHIC SLAB FOUNDATION. Although the barn will not be enclosed and heated, its super important to install a vapor barrier underneath so that the ground moisture does not migrate into the slab and cause issues with condensation on the concrete floor, foggy windows, or decomposing concrete over time. As with any concrete foundation, reinforcement like rebar and remesh are also critical layers that will keep the concrete strong and prevent structural cracks and damage that may jeopardize the strength of the concrete. We cut control joints in the concrete to encourage the concrete to crack at certain spots.
Tamping and compacting the underslab gravel is a critical step for prepping a concrete monolithic slab foundation. It will ensure that the slab has a solid base that won't settle over time causing cracks and weak spots in the concrete.
Another important detail before pouring or placing concrete is to wrap and protect your plumbing pipes from direct contact with the concrete. That way, any expansion and contraction will not damage the piping.
Check out these other important steps in our first video on prepping this concrete monolithic slab foundation.
It's always fun coming back from a big 420 break then have the homeowner quizzing you about the project.
Hahahaha!
this comment made me laugh... if you know you know.
Great video, thank you!... may i suggest.. a quick edit with a voiceover instead of the wind noise ....
Very informative and well done. My only complaint is the background music during the dialogue with the mason. It was distracting. Thanks for sharing your knowledge!
This is so cool, you guys seem to know how to do things. Been trying to learn how to draft plans with chief architect, seeing how it goes down is really helpful, thanks.
Thanks for watching. We use sketchup to draft plans and build all the little custom details in 3D. Glad this video was helpful! Cheers
So much good info in this video, but it really needs to be reposted with a voice-over. Very difficult to hear over the wind noise.
Solid content man, I appreciate you & Jason making time to share.
Thank you for this!
My pleasure!
1:24 - Good tips from Jason the Mason.
Thanks!
Looks super pro but wind noise and music make it impossible to hear what’s being explained 😳😳
Like Lucas Scott I hear you. I have limited control over the volume of music, and no control over the wind!
I know the struggle - maybe try using a mic w a wind screen or a deadcat on it. If you’re filming on your iPhone you can get a plug in lav mic and throw a windscreen on it. I’d say for this type of content (informational/educational) skip the music all together if you can’t control volume - the most important piece is the information. Just some ideas. Learning about foundations and I’ve been watching tons of videos, this is one of the best looking (neatest/tidiest/most prepped) layouts ive seen. Good luck!
Thanks for the tips, and the kind words!
@@HeirloomBuilders a voiceover would be perfect for this type of video. Then you don’t need to film yourself and can just focus on what you are describing. Just an idea.
very informative video! thanks for taking the time
You’re welcome. I’m glad that you found it helpful. Good luck on your project
Thank you for this information, and can you explain to me in which direction the main rebar is
Looks Great! And informative, well done. Question regarding your interior concentrated load point: Did you taper the footing edges? So that your not going straight from a 20" deep footing to a 4" slab with a 90 degree angle and possible cracking at this intersection? Tapering the concentrated footing so that the footing meets the slab at at a 45 degree angle, thus having less of a hard angle? Similar to typical perimeter foundation details?
Yes, good point: when we dig out the gravel for the thickened footers, the gravel won’t hold up vertical; it will repose to a 60 degree-ish angle.
Great, thanks for the info
wouldn't there be air pockets trapped under the plastic?
Great info. Could ditch the music
I hope that you have purchased a shotgun mic by now. That would eliminate your wind noise.
Between the wind and the music I heard nothing of this...
Great video, which stone did you use? Do you like crushed concrete?
We use 67 stone under the slab, and 78 stone (pea gravel) to bed the plumbing pipes. Never used crushed concrete
What’s the purpose of the foreground music, because it’s so loud it’s definitely not background music. When you are trying to share information don’t have anything competing with the source.
Good informative video. I think it would have been better if you got rid of music in background. Definitely hard to comprehend what you and other people are saying due to the wind noise and music in background. Otherwise good video.
Damn…. He is FINE❤
Hello
Do you know a company in michigan
Looking at building a house
Without basement. Thank you 😊
This is music from Hotwheels Unleashed hahaha
I'm not sure which is worse, the wind or music, informative video otherwise
Do you sell the plans and sketchup designs for this barn?
Hey Doc! We don't have the plans in a printable form since we fast-tracked this project and designed it on the fly. But I do have a full model of everything that I could package into a sketchup file for you. What's do you think is a fair price for the 3D model?
Do you have a video of how you are doing the post bases? Wet set or anchor bolts? I’m doing a post and beam cabin soon and I’m wondering if I *need* to go the Perma-Column route which requires 18” thick concrete
I don’t have a video on the post bases yet. But we prefer to drill and epoxy into the finished concrete slab in this case (so we can get the locations dialed in exactly and not have to finish the concrete slab around a bunch of wet set post bases.
Hey there, who did you use to do your slab! We are down the street basically and are looking for someone to help do our monolithic slab!
Man I hate to see tutorials given when the people giving them have no clue on the process that they are trying to explain, plastic uses as expansion material, really, not reinforcement around the penetration's through the slab, other than the WWF for the slab. and the thickness of the plastic vapor barrier is irreverent, some specifications call for a minimum of 6 mil but really consider why you really need one. check your building codes.
I wish I understood what you are trying to say, but it’s not clear. Please take a little more time to explain what you mean if you’re going to leave a hateful comment. Otherwise, other people here that are trying to learn are missing out on some good information that you may be able to provide.
Yes I agree the guy read it 10 minutes ago..
Can’t hear it clearly because of the background ground music. Sorry
Ok… how do you fix a basement that’s monolithic and has a leak? I got a quote for 16K to fix it and add drains…. Our walls are bucking too… what do you recommend? I’m having a second person come out from a different company to give me another take. I did not want to go with 16k right away. I like to compare prices and how jobs are done.
French drain and waterproofing. It could easily cost 16k depending on how deep they have to dig, what’s in the way of digging, and how far they’ll have to trench the drain to daylight.
What’s the software you use for that 3D design? That’s badass and I want to play with it myself.
Thank you, Anarchy! We use SketchUp for designing all our projects
Is a monolithic slab OK for most single-story buildings? Soil type?
Yes, a monolithic slab is good for most homes, just need to size the with the of the turn-down footing to accommodate the soil bearing capacity. A 12” wide footing is plenty for soils that can bear 2000psf
Does the weight the concrete exerts on all the steel, as it is being poured causing the steel to settle, eventually cause the edges of the steel or the steel seats to puncture the vapor barrier? Is the vapor barrier puncture proof, and if so, is there a rating the defines that?
Good questions. As we place the concrete, we pick up the steel reinforcement mesh so that it's embedded approximately 1" from the surface. We use 10mil or heavier plastic as a vapor barrier so that there are minimal punctures as a result of walking on the mesh. Thin plastic (6mil and less) will puncture easily and should be avoided. th-cam.com/video/bMSgY_obkfU/w-d-xo.html
Good! How deep are the footers
Squeek Hobby Thanks! Engineer specified 24” to 30” deep depending on the point load. The monolithic turn down footing is 16” deep. Code in the southeast is 12” minimum below final grade.
HeirloomBuilders thanks
Hi how big of a this slab would one need for a pre-fab 14x40 log cabin??
You're so lucky the county let you use welded wire and only 6" footing. Here in CA the min footing is 24" deep, 12" wide, #4 rebar everything and its a pain in sandy area. What state are you in???
We are in NC. The footing only needs to be 12” below final grade and 12” wide for a monolithic slab. We don’t have the seismic concerns and all the hold downs like you have in CA. I built in Truckee/Donner Summit for about 7 years, and had to deal with all the seismic and 300 psf snow loads. NC much easier!
What is the cost difference between a slab foundation compared to a block basement foundation? Thanks
A slab foundation will be cheaper. But the actual cost will depend on your site. If you have a steep build site, it will make more sense to dig out for a basement. Slabs are most suited for flat building sites.
Sir what is the need of background music. it would be better without it.
I hear you. And I’m starting to agree with that idea
how do you deal with the issue of frost heave in a mono pour?
Just dig the perimeter turn-down footing deep enough to be below the frost line. Everything in between will be insulated and protected by the gravel base (which shouldn’t hold water if you have a foundation drain around the perimeter)
Are all the slabs for new homes poured on top of a gravel base?
They are supposed to be poured over gravel and a plastic vapor barrier
@@HeirloomBuilders Thank you
how do you know how deep the grade beam needs to be on the side of the slab?
A structural engineer can determine that based on the loads present in your structure. The code book has limited information
How can you tell when a you have a monolothic slab in a house? Are there specific signs?
Most slabs that are built on grade (at ground level) are monolithic. If it’s more than one concrete pour, there will be a visible joint between the two placements/pours. Sometimes that joint is visible 3” below your siding, sometimes it’s buried underneath the exterior wall, sometimes it’s visible at the door opening. Why do you ask?
@@HeirloomBuilders sorry I forgot to respond. So my house is a bit weird I have a house that has a basement space/garage. So the entrance to the basement from the outside is through the garage. But the foundation is built a bit weird the foundation in the front is block about 4 ft high. The soil in the outside of the front is about 3 ft high but the foundation walls on the back is like not even a ft high and that's where everything is kinda flat so there's no soil build up against that foundation wall. And the reason why I'm asking is my basement is leaking bad it seems to be coming from underneath the slab trough some holes that seem to be where old carpet was attached. I also see what appears to be to saw cuts in the middle of one room and that's where water seems to be seeping through it looks like control joints that they do on slabs.
@@chirina5 not much out can do about that except for adding a French drain around the house if there’s not one there and waterproofing the basement walls. Seems like the vapor barrier under the slab was not installed well and may be letting water pass through
Why plastic on the ground?
the plastic vapor barrier keeps moisture from migrating through the concrete slab and into the building
please loose the music. you can already barely hear the comments
That vapor barrier isn't going to work if you keep sticking your shovel into it, cutting holes.
Psst. Is that sketchup being used at @0:24?
Yes! I love sketchup.
@@HeirloomBuilders I wonder if their collaboration with Sefaira’ is useful for the owner/builder? Probably over kill I think. Though the point cloud system seems very cool.
Turn down music, hard to hear other guy talking with. Lost me after that.
sorry about that. i need to mic up the talent when its windy.
Can't hear what the h*** the man has to say because of the damned disco music and wind (no sock on mic).
9:58
Why is it important for you to be in the picture?Show us what's going on.
Unbelievably annoying music trying to hear this, wow
Noise spoils the video. Useless.