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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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Sleeve for below grade pipe penetration

I need to run a hot and cold water supply line to an outside structure 13' away through my basement block wall. This is in the Northeast US, where the frost line is 42" and the penetration will ...
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Medium-term repair for spalled foundation with exposed mudsill

I have an old house (built in 1946) near the ocean. The foundation in the back has spalled off, exposing the mudsill in some places. The worst spalling is 4" deep - you can see the mudsill and a few ...
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Least invasive way to find foundation footings under basement slab?

For a 100-year-old brick house (two-flat) in Chicago, I'd like to find my foundation footings so that I can plan in-floor heating. What's the least invasive way to do so? I'm imagining drilling ...
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210 views

Pier foundation and water table issue

I am in the process of building a small (14x14) log cabin in the woods on a pier foundation: After marking the perimeter, I began excavating the soil and dug to below the frost line (36"). The plan ...
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58 views

Why do foundation bolts at corners deteriorate faster?

I replaced the washers on a house's foundation bolts (replacing old round washers with larger square washers). On 6 of the ~30 bolts, the nut was rusted in place and the shaft was eroded where it ...
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1answer
46 views

J bolt protruding through wall

We have a j bolt protruding through the wall of our concrete foundation after only 1 year. What is code for fixing this. According to our builder the steel isn’t needed and they can just patch the ...
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50 views

When calculating rebuilding costs for insurance purposes, should foundation replacement be considered?

In this question I asked at what temperature a foundation becomes unusable for rebuilding purposes. The answer was a fairly low 570°F (~299°C). A house fire that burns a structure to the ground would ...
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34 views

How can I repair the foundation and plaster coating in my old home's foundation?

I have a house which was built in 1890 in western michigan. The house is a fieldstone foundation. It appears at some point it was plastered or covered. On the west side of my basement there also ...
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204 views

In a house fire, how hot does the foundation have to get before it too has to be replaced?

Not long after the Oakland Hills fire in the early 90's I was talking with a homeowner. I ignorantly said that at least he can still rebuild on the same foundation. He said that at about 2,000°F the ...
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67 views

Best way to parge exterior stone foundation wall

I have a 1894 house with a stone/rock wall (limestone I think). The foundation is in decent shape for the most part but I would like to parge the exterior visible portion to give it a more modern look ...
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51 views

draining sauna into crawlspace

I'm thinking of setting up a drain from my sauna through the floor of my house into my crawlspace. Practically speaking, would this damage the house?
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What type of foundation is best in an area with silt loam soil, cold climate, and high water table?

I'm in the initial stages of planing a structure build, I say structure because what I'm really looking to build is an off grid ( no running water or sewer for staters ) vacation cabin on apiece of ...
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52 views

Determining if a foundation is moving or shifting?

I am finding circumstantial evidence that leads me to believe that my house is settling from the foundation moving or shifting. I've found brand new grout done by a professional cracking after a ...
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Option to strengthen foundation with posts around perimeter?

We are in earthquake country (Oregon), looking at seismic upgrade on our foundation, which is 115 years old and in dubious condition. Are there options for strengthening a dodgy foundation by ...
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1answer
67 views

Help me figure out my wood shed foundation!

I recently bought a house that already had a (~2 year old) 12ft * 10ft shed in the backyard. Currently the shed just sits on some gravel. I plan on turning the shed into a 2 room sauna/changing room ...
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1answer
27 views

seismic upgrade - verifying foundation integrity

We want to do a seismic retrofit on our foundation. House built in 1904. No cripple wall. Mud sill with rim joist. Foundations have a recent skim coat (that we did not do). Concrete slab. So the ...
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35 views

Span between wood post for stilt cabin

I intend to build on Weiss Lake in AL. If I use 8x8 posts, can I span 10 ft with 2x10 or should it be 2x12 for the floor joists? Also was wondering for the foundation can I just sink the wood post or ...
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drywall gap again after foundation repair

My foundation (crawl space) was repaired recently, huge job, home not level. There had been a gap in a corner where the sheetrock had dropped down but that side (plus adjoining 90 degree) was reframed ...
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29 views

Gap between foundation and wrap

I recently purchased a new house in Ontario, Canada. The grading will be completed in the following months. During a walk around the house, I noticed gaps between the foundation walls and the ...
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1answer
80 views

Do I need to add supports before replacing a cripple wall stud?

I have a section of mud sill near a crawl space entry door that has suffered severe dry rot due to rain intrusion. I need to cut out and replace about 3 feet of mud sill. This will require removal ...
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1answer
33 views

How to apply rigid foam insulation to foundation with epoxy plugs?

The previous owners of our home did a foundation repair to fix two large cracks about 10 years ago (it is covered by a lifetime warranty). The repair was very successful, but the epoxy plugs remain. ...
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33 views

How to brace misaligned support post?

Recently purchased a new home, and after removing the builder insulation blanket we discovered that one of the support posts has become (or always has been) misaligned and isn't resting on the beam. ...
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30 views

Preparing for shifting

One concern for any new construction is shifting, which happens most immediately after a building is erected, but all buildings will shift and lean gradually over the years. Even if a building's ...
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1answer
135 views

How to connecting addition frame to existing rim joist

We have an addition that we are adding to our house. We built a new foundation (J-shaped, see image below). Building the floor frame over the new foundation will be done with the standard sill plate ...
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1answer
211 views

New house concrete slab foundation cracks

I am building a new house in North Texas, it has been 17 days since the foundation was poured, I live close to the construction site, so I've been going 2-4 times a week. Today I finally was able to ...
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1answer
31 views

Drilling Piers under exterior wall

We have a small cabin that we would like to extend 10 feet in the back. It has a crawl space. The architect and engineers have designed a new floor plan for the house that involves putting new ...
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1answer
213 views

Water leaking from concrete slab porch into rooms below. How do I stop the leaks?

My front porch is concrete and is above a portion of my garage, laundry room, and a basement bathroom. The house is in Zone 6b: -5 to 0 F. The rooms are not finished and I am not sure of the ...
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1answer
41 views

Remove Foundation Concrete Block

We are having HVAC ductwork installed in our crawlspace and one of the companies mentioned they do not remove foundation concrete blocks due to liability. Unfortunately, for us to have registers in ...
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90 views

Cover or Do Away with the Brick Ledge on Foundation Wall

We have a brick veneer on the front face of the foundation wall that goes down about 4 bricks in depth on that foundation by way of a brick ledge, making that foundation top side smaller than the rest ...
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1answer
64 views

Ceiling mounted punching bag without compromising structure or floor above

This question is regarding the safest way of installing a heavy punching bag of 100 lbs from the basement ceiling. Above the basement ceiling is a wood floor. The goal is to sleep soundly at night ...
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1answer
215 views

basement floor crack widening in newly built home - is this a problem?

Our home was new construction and the basement floor was poured around 1.5 years ago. The builder installed control joints in several locations in the basement slab. Several of these joints have ...
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72 views

Asphalt grading/drainage around house perimeter

The house is surrounded on 3 sides by asphalt right up against the foundation which appears to have been improperly graded, with the grading sloped slightly toward the house on about half the ...
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1answer
74 views

How to prepare for 1 3/4“ to 4” concrete overlay: rebar vs wire mesh vs fiberglass

My house currently has a 3rd car garage that I would like to convert and extend my family room. The biggest question is how to raise and level the garage floor with cement (preferably). I spoke with ...
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Foundation depth for mortared stone wall

I am building a mortared stone retaining wall and I am wondering on what depth to dig down for the foundation with which the stones will sit on. From what I gather from resarching, they say to dig ...
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71 views

Proper way to level a shed foundation on concrete patio

I am building a shed from a kit. The floor kit has a pretty standard 8x12 layout, but the instructions state that it should be leveled by setting it on 3 parallel treated 4x4s (runners), and that the ...
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1answer
53 views

Can someone explain my foundation plan

I requested a copy of my building plans from the city and I received them but I want to make sure I am reading them right. It looks like the foundation says the following: It looks to me like it says ...
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1answer
38 views

Leveling ground under old shed

I have an old large shed I'm trying to get back into shape. The building is about 50 years old and 16'x48'. One of the long sides had sunk in the middle by about a foot, giving that side a bit of a 'V'...
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Need info on block for a vinyl storage shed

I am putting up a 10 w by 8 deep vinyl shed. My intent is to build the base out of concrete block. I am want to put a solid base of block. I am then going to put 1/2 in thick pressure treated sheets ...
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42 views

Should I repair, replace, or remove damaged foundation insulation?

I live in upstate NY and my house was built in 1996 and it has the white thick foam insalation around the foundation. It looks awful and now I have bugs chewing it and building homes. Can I just ...
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1answer
46 views

How do I seal the bottom plate along my foundation?

I have a "steps" in the foundation where there are slim but visible openings to the outside. My questions are; How do I seal this? From the outside/inside? What product do I use? Edit: Picture of ...
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159 views

Wires run through foundation vent screen

I need to replace the foundation vents in the house I recently bought. Unfortunately, AT&T, Time Warner, and others have run wires through one of the screens. I can't easily detach the wires to ...
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51 views

Quikwall parge showing blotches

We recently parged our basement walls using quikwall parge mix. The concrete is now 50 days old and we are planning on painting it with drylok. However, there is one splotch that still looks wet. This ...
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1answer
52 views

Does Polyurethane foam also stabilize soil?

I purchased a house last year and discovered over several months that I live in an area with highly expansive dark clay soil. This has caused cracks in my floating slab foundation, drywall, and of ...
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56 views

What is the correct type of anchor bolt for attaching a sill plate to a slab once the concrete is dry?

If you need to install additional anchor bolts after the concrete has cured (and thus can no longer install traditional J bolts), what is the correct type of fastener that can be installed into dry ...
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1answer
97 views

So Cal garage conversion: Proper way to level floor

I own a tract house built in southern california built in 1995. There was a builder option to have a 3 car garage (standard 2 car with tandem garage) or a super family room where the extension ...
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1answer
121 views

Shed on grade foundation height limitations

I am building a 10x12 shed on a slight slope. I was hoping to do an on grade foundation, but when using a string level, it looks like my slope is about a 2ft difference on its lowest corner. What ...
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1answer
106 views

Do I have a natural spring or a leak

I live in South Mississippi and have lived in my home with a slab foundation for about 20 years. I have never had a problem with the foundation and the ground is mostly red clay. We do have a septic ...
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2answers
111 views

Should I be worried about these v-shaped cracks in my newly poured foundation?

The foundation company just took the forms off, and when I went to take a look, I noticed three sides had this v-shaded crack on them that's visible both inside and outside the foundation wall. This ...
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Is the power brace system a good long-term solution to bowing foundation walls?

I'm looking to purchase a house that has had a power brace system installed, because one of the foundation walls was bowing due to moisture-related soil expansion. Is this system a good long-term ...
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New build next to existing slab

I want to build a new structure, with walk out basement joining up to an existing structure that has a slab foundation. Is this possible? what about the slab/footer for the existing structure, how do ...