Questions tagged [foundation]

The base on which a house or other structure is built or installed, connecting the structure and transferring its load to the ground. Questions using this tag should include additional tags to identify the type or material of the foundation.

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Does this foundation crack require immediate attention?

I am currently looking into buying a house built in the early 60’s and our private inspector noticed this crack in our foundation. The crack is underneath one of the basement windows and appears to ...
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What is going on with my foundation footer?

I have a wet subfloor and been advised to lay a french drain around the house. I have been watching a lot of youtube videos on how to lay ag pipes immediately next to the foundation footer (the red ...
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How to build a shed ramp and account for ground heaving

I live in the Baltimore Maryland area and have recently built a shed on a shed pad that is about 8 inches of 57 stone to promote drainage. I built the shed floor joists using 2x6 pressure treated wood ...
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Should my foundation be wet or dry?

My whole life I was told to put up gutters and get water away from your foundation by building effective drainage. The reason was to stop the slab from having different levels of moisture and cracking....
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Block wall drilling considerations

I've recently moved my woodworking space into our house's basement garage. I want to mount some french cleats on the blockwall. Far as I can tell, the walls make up the foundation and are load bearing ...
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Challenging foundation leak

15 years ago we added an extension to the old cinder block foundation which is now 60 years old. The new extension is also cinder block. Where the old and new meet, we have a leak. I put hydraulic ...
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What size additional footing should be included in a monolithic slab for a 22'x32' carport columns?

In pouring a steel-reinforced monolithic slab for a 22' x 32' carport, the edges are to be thickened to 12" x 12" around the edges & 4" over re-wire in between. Is 24" x 24&...
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Old home clay foundation pipe?

My home was built in 1948. It's having a lot of bowing and shearing issues and I need to put steel beams up in the basement. An interior drain system has also been recommended but I'm reluctant - and ...
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Help me enclose my crawl space

I have a home in the Northeastern USA (Maine). The frost line is roughly 5 feet. My home appears to be built using posts and piers. I haven't had a chance to start removing things to get a better view ...
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How long should you wait to pour concrete on fresh concrete?

I'll soon be doing work in my basement that needs my plumber to break the foundation of my house So they probably gonna break the concrete, do their work, then pour some more concrete to patch the ...
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Are nail pops in drywall a sign of structural concerns?

I’ve been noticing more and more mail pops throughout our home. Not sure if they are actually “ongoing” or I just notice them more. I see a lot like the picture below where the nail isn’t protruding ...
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Why do I have wooden frames underground parallel to concrete foundation?

I was digging up the ground outside to fix a gutter drain, and noticed there were pressure-treated wooden frames buried underground, parallel to the foundation (1st photo is the house; 2nd photo is ...
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What is this small (~1" x 2") rectangular hole in my basement?

We have some vinyl tile flooring in our basement and the section that contains the washer/dryer had one of the tiles develop a hole due to some kind of depression underneath. I took the time to cut ...
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Replacing load bearing beams in a covered porch to patio conversion

I'm starting a project to turn my covered porch deck into a covered stamped concrete patio. The 3 support posts for the roof all need replaced. There is a 4th post that needs replaced as well that is ...
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rebar requirements in foundation

follow-up question: I am attaching a diagram with my foundation plan. I am in north NJ where frost line 3 ft. Can you kindly look at the plan and opine; I tried to use best practice from all replies. ...
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Can I use a ground trench as a concrete foundation form?

My city said that for my 2-1/2 story home, the foundation needs a 12 inch wide and 3 feet deep foundation with 3500 psi concrete poured within the mud wall (i.e., no need of foam board). I am planning ...
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How should this addition's concrete foundation be reinforced, if at all?

I'm asking about what looks like a DIY concrete foundation under an extension. There's a few issues with the foundation, but given how long it's lasted, I'm not sure it needs to be made sturdier. ...
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Basement walls in bad repair?

We recently bought an older home built in the late 30’s. Previous owner painted the basement cement walls.. bad move. They look like this. Attached is a wall where the other side is the exterior of ...
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How can I convert my half-log cabin's floating (poles on rika blocks) foundation to in-ground cemented poles?

My wooden house is a 6m x 6m CCA treated frame, cladded with CCA treated half-log. From the back to the front, there is about 1m of fall. The house rests on CCA gum poles in the front, where it is 1m ...
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Found foundation wrap in the basement. Is it concerning?

Sorry in advance if the question does not make sense or seems to have an obvious response. Fist time buying a house here. We’ve been living in condos since forever. Today we went to see a house (100+ ...
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Is this a foundation problem - void space underneath exterior brick wall

We moved into this house 5 years ago and did not find a piece of dead tree root at the bottom of the wall until yesterday. It seems the previous owner cut the tree, but here is a small damage to the ...
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Is this a serious structural crack in my basement or not?

Hello I recently bought a house a year ago and didn’t really pay attention to much to little things around it. I did get it inspected. A month ago the basement flooded due to a busted sump pump so got ...
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Addition cement slab

Should an addition of cement slab be attached to house foundation?? I do not know any information about this pretty new at all this planning on getting a 18x30
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Sand deposits on top of drain tile impeding water flow

We have a foundation drain in our home that works OK. However, I've seen that over time it starts to accumulate this red colored sand deposited on top of the drain (where the gravel is), which slows ...
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Spidweb crack on wall the looks to have gapping where to start to find the cause?

Wall above kitchen door way center of the house looks to be sticking out dry to touch house is brick ranch on a slab and built in the early 60’s Is there a way to verify no water/foundation issues? ...
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Basement floor crack [duplicate]

I've lived in this house since April 2021. It was built in 1970. I don't know if it's just the lighting, but I never noticed this bump in the floor under the carpet before now. It looks like a crack. ...
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1 vote
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Is it a structural issue if framing overhangs the slab by 1 3/8"?

I am having an addition built on my home. The framing is starting to go up and I noticed that one of the corners overhangs the slab by about 1 3/8 inches. I asked my contractor about it and he said it ...
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6 votes
3 answers
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Can a power transformer cause building vibration

For six weeks something that runs when it's cold outside has caused shaking of the floors. There is a transformer for the powerlines at the back of the property. Neighbors to right and left don't ...
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What is this small hole in my concrete basement floor?

I have a hole in the concrete floor of my basement. It's about the size of a quarter and is deeper than a chopstick (I didn't try putting anything deeper in there). I'm including a picture below. I've ...
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Pre-existing galvanized gas pipe through foundation underground with no sleeve. How to best manage?

I have a gas pipe that is going through the foundation underground, it's going through a hole that is about a 1/4" bigger than it that has been cleaned out, there is no sleeve. Don't ask how we ...
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What is the best way to insulate already existing stud wall against block foundation?

I am doing some remodeling in the bathroom of a bi-level. I removed the wood paneling and found the stud wall directly against the concrete block foundation with batt insulation only in the cavities. ...
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Should I be worried about this crack?

We recently moved and noticed this forming. Should I be concerned?
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Why are basement walls subject to tensile forces?

I am teaching a mixture of English and Civil Engineering to a student, while not an Engineer. One of our textbooks states: Underground walls have to resist both tensile and compressive forces ...
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Horizontal rebar protruding from foundation [closed]

On a new build, in Grants Pass, Oregon, should rebar protrude horizontally from a stem wall foundation? The concrete is poured. It is no Ufer, it is rebar - looks to be used to assist in supporting ...
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Do I need to bolt bottom plate to shop concrete foundation?

I have a shop with concrete foundation. I am planning to build a little office where one wall is against and secured into current shop wall. In that case, do I still need to bolt the other 3 wall ...
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How to route/replace HVAC plenum/trunk lines through a poorly designed foundation wall hole with a gas pipe in the way on the other side

New homeowner of a 1959 constructed house. Surprisingly, only 4 owners (including myself), with the last 2 each having it for about 20 yrs and each seemed to be DIYers - not necessarily choices I ...
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Should I worry about this foundation crack?

The pictured crack in my house’s foundation runs along approx 80% of the side of the garage. The house is from approx 1965 Is this a concern that I should hire a structural engineer for ? Thanks for ...
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Should I extends stackable concrete piers all the way up to an elevated cabin floor?

I am in the process of building a 19'x19' cabin that will be perching on 8' piers. I got a structural engineer draft for the foundation and piers and he recommended using nine 6"x6" posts ...
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Two by fours embedded in basement concrete slab used for framing... including a load bearing wall. Should I be concerned?

So there's some long ass backstory - sorry for the wall of text! I figured better too much detail than too little tho. We recently bought a house in Vancouver, WA (climate zone 8b), a custom job ...
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Should I be concerned about these cracks?

I bought a house 8 months ago the inspector said everything was fine with the house. This past weekend I noticed this crack that goes the entire length of my garage and down the wall, are these ...
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Foundation wall slanting towards deck

I bought my first home in Sep 2020 and redid the old deck since all of the planks in the old deck were rotting away. When we reinstalled the deck, we had the deck raised in height and also increased ...
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Slab Foundation with Cracks and Uplift in Floors, Driveways and Back Patio

I am buying house for the first time and the home inspection report came back saying there may be potential foundation issues. I have attached screenshots from the report below. This is an 1976, one ...
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2 votes
1 answer
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Is this rust on my lally column safe to sand and seal?

first time poster here. I’m in the process of finishing my basement and have reached rough framing near my only steel lally column. I’ve noticed rust in the past but just took a good look and am ...
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Trying to get advice on how to fix missing cinder blocks in my crawl space

Just had my crawl space inspected and it’s missing some blocks down there and the insulation needs to be replaced, it’s outside under my porch and it’s no mold or water down there but I’m looking to ...
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16 votes
3 answers
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Why did cracks form over the rebar grid in my concrete footings?

I am building a house and we just poured concrete 3 days ago and now it has some cracks, This is the footer with reinforcement : This is footer after pouring concrete : These are some cracks that we ...
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Waterproofing mortar over hydraulic cement

A 2sqft section of my poured-concrete basement wall has begun weeping. It seems that the concrete was not mixed thoroughly in this area and after 80 years the water has found its way through. There is ...
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9 votes
6 answers
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Can I pour a concrete foundation in multiple pieces?

I'm building a 25-meter (65 foot) block retaining wall. The engineering specifications require a concrete foundation for the block wall equal to about 4 cubic metres (141 cubic feet) of concrete, with ...
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Foam/Poly Jacking Garage Floor?

The door jambs on the two exterior hinged doors for my garage are becoming an issue with being out of square. The floor is otherwise pretty much OK (no cracks, etc.) The floor is part of a 6" ...
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Fix Hole in Foundation

I have a hole in my foundation that is letting a ton of water right into the crawlspace. I think it formed over several years from a gutter downspout that wasn't functioning properly (I plan on ...
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Prevent animals from making a den under a shed?

I am building a shed and like most sheds, the floor frame is on blocks, so there is a space of about 10-12 inches under the shed. I know from previous experience that foxes and rodents like to use ...
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