Concrete Basement Wall With Exterior Insulation

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International Association of Certified Home Inspectors (InterNACHI)

Күн бұрын

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.

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@orangeblossomhomeinspectio432 3 жыл бұрын

Thank you for sharing!! John Grimaldi CMI and InterNACHI Home Inspector Mentor Orange Blossom Home Inspection

@internachi 3 жыл бұрын

Our pleasure!

@kennethmclean3679 Жыл бұрын

very thorough explanation. thank you

@internachi Жыл бұрын

Thank you.

@lilmann1111 3 жыл бұрын

This is perfect I have been looking for a good illustration like this for a while. I would love to see this with more details like what is the best method to secure foam to the concrete wall, before backfill. If using Rockwool how to secure it to foundation wall etc! Thanks again guys

@internachi 3 жыл бұрын

Awesome, thank you!

@andreycham4797 7 ай бұрын

Perfect, it is when you have continuous insulation all around . Here we have interior concrete wall not decoupled from footings

@Bart-dg6qv 7 ай бұрын

@@andreycham47971:11 I also wonder why there is no styrofoam between foundation wall and concrete slab.

@Thoracius 2 жыл бұрын

Simply backfilling with granular material is a ticking time bomb, depending on your soil. Maybe it's 40 years, maybe it's 70 years. But sediment and clay will follow water into that granular material where it will deposit and eventually clog it up, at which point you'll be dealing with the effects of hydrostatic pressure on your foundation, which will crack it and maybe bow it. Another thing, rigid foam placed in a single layer will shrink, leaving gaps at the seams, which is where your foundation wall will have cold spots.

@internachi 2 жыл бұрын

Good feedback.

@joshsmithward8848 2 жыл бұрын

What’s the right way to backfill to avoid the failure scenario you describe? Also, I haven’t heard of rigid foam shrinking. Do you mean that you have to overlap the seams of it as you apply it? How do you get an even plane?

@Thoracius 2 жыл бұрын

@@joshsmithward8848 I recently excavated my basement and used non-woven geotextile fabric to keep the the clay-rich surrounding soil out of the gravel I backfilled with. The previous backfill had with time all clogged up with clay and started pushing in my block wall, so I did not want a repeat. I guess time will tell whether this will be successful. Not sure if staggering seams on the rigid foam on a basement is as important as other applications, but on exterior walls and especially roofs you use two layers so you can stagger the seams by offsetting the second layer vertically and horizontally. This way when it shrinks the channels of airflow don't bypass the entirety of your insulation. On a roof these channels would lead to condensation and rot issues, but on a basement this is not an issue. But it's not really more expensive to buy two thinner sheets of foam than one thicker one, so there's hardly any reason not to use two layers and stagger the seams.

@tcranston 2 жыл бұрын

@@joshsmithward8848 Get a non-woven French drain textile fabric, NOT garden weed control fabric, and use washed septic stone on top of the fabric, then lay SCh40 PVC perforated pipe (NOT the flexi black hose stuff), cover the PVC with more washed stone, then cover it all with a flap of the fabric over the top (the burrito style). Rigid foam is neither dimensionally or thermally stable, with the exception of BASF Neopor foams. Rigid foams also will hold water and can host bugs/mold/rodents, and Neopor will not.

@linusgallitzin Жыл бұрын

Ants seem to like foam board and will turn it into swiss cheese. I'm wondering how long it will be until foam board is re-evaluated for something else like bubble foil with less of a rodent problem.

@internachi Жыл бұрын

Thanks for watching and commenting.

@alexanderruiz6479 11 ай бұрын

You often see many home foundations with just exposed concrete above grade. In that case, does the insulation simply terminate right below grade level? How do you protect the top seam of insulation in that case?

@pettydesign 11 ай бұрын

They often don't have insulation

@andreycham4797 7 ай бұрын

If you want to insulate your basement walls, you should go down to footings with insulation, if you do not do this heat would escape through concrete, top soil into cold ambient air

@internachi 6 ай бұрын

Thanks for watching and commenting.

@patty109109 6 ай бұрын

You often see that because virtually nobody in the world uses exterior insulation like indicated here.

@snowgorilla9789 5 ай бұрын

@@patty109109you obviously do not live or have been to Canada

@garysantos7053 Жыл бұрын

Where do the foundation drain and the below slab drain go? Is it pumped out? Is it pitched to a lower grade?

@internachi Жыл бұрын

Good question.

@canonicaltom Жыл бұрын

If you have so much liquid water against the foundation that you need to actually drain it somewhere or pump it out, there's a design failure in your building.

@patty109109 6 ай бұрын

@@canonicaltom that is unequivocally 100% wrong. Every single house in my area has a sump pump or gravity drain. ALL of them.

@canonicaltom 6 ай бұрын

@@patty109109 That just means whoever built those houses were negligent.

@AsHellBored 2 жыл бұрын

i have done a few remodel projects and I have yet to see a house with this many steps/details. It explains a little why homes are more expensive today. But at the same time homes today dont necessarily last longer.

@internachi 2 жыл бұрын

Thanks for watching.

@rogerjohansson3885 Жыл бұрын

Best way to build a concrete wall DIY dry stacking concrete hollow Blocks!! Yes explanation provided. Building the concrete Basement walls DIY? Concrete Molds building? Then need to by extra wood plywood- and steel material. Instead expenses to save and how. double H- Concrete blocks and (concrete DIY made) traditional way DIY. - When you are building i.e basement DIY walls such as the house foundation. Have you considered dry stacking and (easier to reinforce both vertically and horizontally) with a concrete double-H block design to use? Oldcastle Common-8'' x-8'' x 16''- (''Concrete Fence Block''). So you don't have to use mortar at all, but just (which you can then) make your own concrete (you don't fill the entire height of the wall) but you build 3-4 courses (rebar V- & H) in height and fill with concrete as much as you can in one day. No rainwater collects (when work is stopped on holidays) then either in the concrete block wall. Electrical junction boxes and appliance sockets can (with sockets for these in the blocks) be mounted (and with connections then inside the wall with suitable electrical pvc-pipes intended to be used as such) and the junction boxes and appliance sockets are attached to a 5-7 mm aluminum (suitable metal) plate, which is screwed firmly in the shell-block wall before filling the wall with concrete.

@internachi Жыл бұрын

Thank you.

@andreycham4797 7 ай бұрын

Sorry, Bro, it is difficult to understand, in my opinion basements are build by stupid people or by those who do not know what to do with their money.. First . It is more comfortable to be in living space above ground. Second . It is cheaper to build living space above ground . Third. When it is time to sell real estate agents would assess living space in a basement for only 50-60 precent compared to space above ground

@MattFerguson26 11 ай бұрын

1:15 Any suggestion of exterior board to use? I have 12" exposure and looking for something that looks decent, thanks.

@internachi 11 ай бұрын

Good question.

@keithanderson6997 10 күн бұрын

I had the exact same question. Been wondering what that material would be for a while.

@MattFerguson26 9 күн бұрын

@@keithanderson6997 I eventually found that a 1/2" thick Azek PVC board could be used, or something similar. Hope that helps you.

@shenoyglobal Жыл бұрын

How do you do the drain tile on a concrete piles foundation ?

@internachi Жыл бұрын

Good question. It would be similar in that the drain tiles would follow the bottom of the piles locations.

@shenoyglobal Жыл бұрын

@@internachi what you said makes sense from the outside.. but from the inside not sure how the sequence goes.. a video would be better!!! assume piles go 50 feet deep and then the plinth beam and footings are attached to transfer the load of the building to piles.. now from the inside how would drain tiles go!!!!

@andreycham4797 7 ай бұрын

@@internachidude, your house on concrete piles they will not rust in water . You do not need drainage there

@redsresearch 7 ай бұрын

what do you use for the capilary break on the footer under the foundation wall?

@internachi 6 ай бұрын

Moisture

@redsresearch 6 ай бұрын

@@internachi what

@patty109109 6 ай бұрын

@@internachi you use moisture as your capillary break? 😅 you made the video and you don’t understand what he’s asking?

@CMCraftsman 2 ай бұрын

Haha. Use the same water proofing that you’ll use on the exterior of the foundation

@billeb420 Жыл бұрын

How is foam insulation attached to foundation without compromising waterproofing?

@internachi Жыл бұрын

Good question, William.

@johns.1940 Жыл бұрын

@@internachi Wait, didn't y'all make the video? I would think it more appropriate to respond with an answer rather than a compliment. If your intent is to inform, you kind of failed. All I see here is some skethup artists bright Idea of a perfect world with any sort of explanation of the system or attachment sealing methods. Almost utterly useless. But I'm just a cat so what do I know.

@patty109109 6 ай бұрын

@@johns.1940 he obviously doesn’t understand the topic whatsoever and pull the content from somewhere else