Slab-on-Grade Foundation With Concrete Stem Wall and Under Slab Insulation
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- Опубліковано 9 бер 2021
- Learn how to inspect slab-on-grade foundations with concrete stem walls and under slab insulation. Thanks to the educational resources provided by the Department of Energy Building Technologies Office and Oak Ridge National Laboratory, InterNACHI® School (internachi.edu/) will be providing a new free, online course on inspecting foundations of residential and commercial buildings.
I literally came back to watch this video again just for the hip jazz track background music.
Nice.
Takes me back to the old weather channel GD 🎺 they get down baby
Exactly what my short term brain needed.
Nice. Ha. Glad it helped.
Cool illustration, thanks.
You're welcome.
Thank you for sharing!!
John Grimaldi
CMI and InterNACHI Home Inspector Mentor
Orange Blossom Home Inspection
Our pleasure!
this is perfect, thank you!
Glad you like it!
Good info great video
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Awesome vids!
Awesome. Thanks for watching the video and for replying. For more home inspection videos, please visit www.nachi.org/webinars
This is great. Any animations with basements?
Yes. Coming soon.
Yes. Coming soon.
@@internachi awesome! It will definitely help me a lot! Thanks 🙏
thank you for your great video, what is the program used for the simulation?
Not sure.
id love that with complete thermal break (complete outside insulation).
Okay.
Is it OK to all the sole plate 2x6 to over hang the vertical 2in foam board? That does not seem ok.
Thanks for watching and commenting.
Many codes will require the poly to be below the insulating board under the floor.
Yep.
How do you form the shelve the slab sits on?
4" mcu stacked on a 8" mcu on top of footings
Good question.
I was under the impression that drill in anchor bolts were better than j bolts, is this the case?
Great question. Thank you for watching and commenting.
What is the thickness of the upper portion of the stem wall?
Not sure if there's a max limit on that component dimension.
Depends on local code. Here we generally use 8" stem wall sitting on an 8" thick by 16" wide footer. These dimensions can vary due to earth substrate, weather conditions, moisture content, and various other reasons. Your local township or county building official will know what your area requires.
Why do homes sometimes have interior footings where a wall doesn't exist?
Architect.
Better and simpler to do the stem wall in ICF and better still do ICF all the way to the roof.
Nice.
@Brad Olson not by much and with all of the benefits (lower heating/cooling bills, a house that will last twice as long, disaster resistance, etc) I'd say it's a no brainer.
Sincerely, an ICF builder
how would a doorway be added to this if the bottom of the door is ground level in line with the interior slab? Would I simply raise the stem wall and insulation that's on the interior of the stem wall?
Not sure. Good question.
no rebar in the slab, only in the footing and stem wall? 🤨
Good point and question.
❤️❤️🙏🙏
Thank you for watching.
What is the layer below the termite schield??
Hm. I'll have to play the video again.
@@internachi lol..Nice! I see what you did there…🤣
Why does two layers of sill seal needed ? The plastic sheet on top of the insulation already serves as a capillary break , right ?
Apparently the people who built our house didn't get the memo about sill seal or termite sheild.
What memo
Which builder is this?
Right.
Could you please write down the text or subtitle on movie?
The title of the video is "Slab-on-Grade Foundation With Concrete Stem Wall and Under Slab Insulation."
@@internachi he means write down the text of everything said in the video. It's impossible to understand what you are saying the layer is below the termite shield. It's slurred.
Please let us know the region where these details a required.
General building practices.
Mid-latitudes of USA, looks like. This design does not really touch on frost heave protection, where footings and slab are better protected from frost.
The structure shown in the video seems to be risky. The main load of the building is on the footing frame. This would sink into the ground while the slab is nicely cushioned on the Styrofoam. After a few months there would be cracks developing where the walls meet the floor.
Good point.
The width of the footing is based on the weight it must carry and the strength of the soil. This is thoroughly covered in building codes and is standard engineering practice, which is why you see this foundation design used on lots of houses, without houses sinking into the ground.
This foundation is supposed to be used in one and two story buildings only
Isn't it supposed to be on footing?
No rebar?
Need that.
Insulate the exterior of the foundation people. That's the minimum you can do.
Yes.
You have a choice. If you insulate under the slab, and also the slab edge, you have already isolated the interior floor from the outside and don't need any other floor insulation. However you can achieve a similar result by doing as you suggested, and insulating the outside of the slab. Both approaches work very well.
Hope this sticks, basic but useful:
publications.gc.ca/collections/collection_2011/schl-cmhc/NH15-457-1998-eng.pdf
I'm gonna stick to the v8 slabs. These turbo slabs give me a headache.
Okay. Right.
Termite shield. Funny. That won't keep termite's out.
I agree.
The purpose of the shield is not to stop them. It is designed to force them to the outside of the wall. When coming up from underground, along the exterior face of the foundation, they are forced to the outside by the shield. In order to get up into the wall they must go over the shield and into the base of the wall. To do this they will become visible on the outside of the shield and can they be eradicated.
With a shield it is still necessary to inspect regularly. But it makes the termites much easier to see and consequently to eradicate.
Speak slowly /carefully essential to pronounce syllables well . Jim
Thank you.
In reality you will not build a stem wall like this too complicated that shoulder is not necessary
Sure looks nice though. ;)
It looks like a great stem wall detail - the concrete shoulder protects the vertical section of foam, unlike other applications that have the foam on the outside where it must then be covered or protected from damage and weather.
What's with that stupid music drowning our what you are trying to say!!
Glad you enjoyed watching the video.
Fake
Take
@@internachi Rake