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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1answer
32 views

Best and easiest way to seal insulation above concrete pour in unfinished areas of basements?

One of the things my crew is doing is trying to quickly make unfinished areas in basements look nicer and easier to clean. We usually stuff all outer joist walls with roxul to insulate and while this ...
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1answer
442 views

Water on block foundation wall

I have water on the top 4 feet of my basement foundation wall. This goes around almost the entire perimeter of the basement. The bottom 4 feet of blocks are dry. Any ideas the cause? Can someone ...
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1answer
32 views

Contact cement for foundation dimple board

I have a cinder block foundation and plan on excavating to apply a 3 layered approach toward waterproofing it. Paint on asphalt sealer (aka tar) - Henry 101 Bituthene adhesive membrane (similar to ...
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12 views

Damp musty smell in house

We have lived in this house for over 20 years but for about the last 12 months we have had a musty smell in the hall and kitchen which are at the front of the house. We have checked the roof, mains ...
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1answer
54 views

How level is 'good enough' for a 8x14' shed's gravel foundation?

I built a gravel foundation for an 8x14' prebuilt wooden shed. I spent a lot of time addressing drainage and most aspects of the foundation. Now it is finished, I think, but I want more experienced ...
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1answer
15 views

42" Elevated Foundation Build in Coastal NC

What are the best practices for residential elevated foundation 42" construction in Coastal NC? I have read alot about: soil tests, compacted fill, 4" of gravel on top of compacted fill, ...
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4answers
27k views

How to seal between sill plate and foundation wall with wide gap?

Here is a picture of the top of my uninsulated basement wall. The foundation is poured and from early 1970s. For orientation to the photo: the white in the lower left corner is the vertical face of ...
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1answer
38 views

permanently closing off a crawl space under a house

I have a old small house that that was built in the 60s above ground with a dirt  crawl space underneath. There are two  access openings on each side of the house 28 x 18. There is no need to crawl ...
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47 views

Foundation Crack and Severity

My wife and I recently completed a house inspection. A little on the house: it was built in the late ‘40s, the grade is excellent and has been built up around the entire house, the drain spouts do not ...
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3answers
17k views

What type of concrete foundation do you pour for sand?

I have a piece of beach front land that is sand (sometimes wet), what kind of foundation do you pour for a home constructed on sand? What kind of considerations do you take in if its water front and ...
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2answers
54 views

Are water and vertical cracks normal for full height crawl space? [closed]

I am thinking about purchasing a home that is set on top of a crawl space (see image). The crawl space has the full height of a basement, windows and a door leading outside in the back. It has French ...
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1answer
53 views

New house concrete slab foundation cracks - TX

I'm asking about advise\idea\help. I'm new home buyer in Austin area TX. I bought a new home in the foundation stage. Now it's in the framing stage. Yesterday I found that I have 3-4 cracks on the ...
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1answer
60 views

Should cracks and water in the crawl space concern me when buying a house? [duplicate]

I am looking at a house that with a crawl space (see image). The crawl space has the full height of a basement, windows and a door leading outside in the back. It has French Drains along the downhill ...
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0answers
58 views

Replacing a full height crawl space with basement

I am thinking about purchasing a home that is set on top of a crawl space (see image). The crawl space has the full height of a basement, windows and a door leading outside in the back. It has French ...
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1answer
63 views

Cracked grout and leak in shower side wall - short and long-term fix given foundation work?

There is extensive cracking in the grout along the upper portion of our shower side-wall, both inside and outside of our shower. We've also noticed a leak in the shower wall, likely due to the fact ...
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2answers
830 views

Does Age of Home need to be considered when encapsulating crawl space?

I have had my crawl space encapsulated. It has made a big difference in the air quality inside the home (80 years old). However, I am now seeing cracks throughout my home in the walls closer to the ...
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1answer
68 views

Placement of a 5" hole in foundation

I have some concerns over where to place a 5" hole for a pellet stove chimney. The stove is in our basement, and I'd like to have the chimney exit through the exposed part of the foundation. I have ...
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1answer
166 views

Estimating frost heave displacement?

I'm planning a storage shed underneath a deck. I'll assume that the deck is anchored below the frost line and won't move when the ground freezes. I'd like to build the shed on just a floating gravel ...
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1answer
123 views

Using tarpaulin to stop soil absorbing to rain, trying to prevent foundation damage

There is a forecast for several inches of rain between Thursday and Sunday here. I am in an old brick home with a sandstone block foundation. The soils are clay in this area. There is a rather large ...
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1answer
48 views

Paver Patio with Backfill Settlement Around Block Foundation

Main Question: I've been told that a concrete skirt (8" sloped pad) below the frost line and attached to the foundation via rebar is a good solution for putting pavers next to a block wall ...
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3answers
288 views

Wet blocks AFTER French drain and weep holes

I had water leaking in my cellar from bottom of floor. Water was NOT on blocks at all. Now after French drains and weeping holes put in, the cinder blocks along the bottom of floor are wet. Will this ...
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2answers
2k views

Can I run an underground wire to a shed on blocks?

I have a 12'x16' shed which has been leveled using concrete blocks but otherwise sits on the grass/dirt. It's about 100' from the house. I live in Georgia. I'd love to add some lights and outlets ...
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1answer
112 views

Did I severely compromise my foundation by drilling diagonally through a floor joist?

I’m boring some holes to run new wiring and there happened to be two adjacent floor joists under where I was drilling, so I drilled diagonally-vertically through one of the joists. The hole is 3/4” ...
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29 views

Shed on concrete pier blocks - how to brace laterally?

I'm building a shed on concrete pier blocks (12x12, 50lb), on 4x4's on adjustable support brackets. How do I laterally brace the structure using this? Is there a size threshold where I don't need to? ...
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2answers
390 views

Will 2x10 joists span 10 feet between rims for a cabin? [closed]

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?
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How to fix crack in slab foundation wall has 90 degree turn to horizontal below the surface?

First, is this 90 degree switch from the vertical wall to horizontal bottom a normal feature of slab foundations? This is a 1953 ranch in northern Ohio. Red arrow in photo indicates the turn to ...
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2answers
64 views

Correct way to fix a broken block in a cinder block foundation

I have a 1954 built house with a cinder block crawlspace foundation with about a 1 1/2 foot clearance. I can squeeze in, but not easily. I'm in Cleveland, OH, so there is definitely a freeze-thaw ...
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2answers
121 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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52 views

Why is there a hole in my slab?

We had a leaky pipe burst over the weekend. It seems that it had been leaking (slowly) for some time, so there's some water damage to the wall where it was located. In order to clean it up, I removed ...
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1answer
68 views

Can I put crushed stone on top of sand base for brick patio?

I have a brick patio that is not level and filled with weeds. There are areas where it slopes down and the back up. I live in Maryland so it can get really hot and cold but I have not seen other areas ...
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4answers
2k views

Leaving basement forms on permanently

I am having an addition built on my home with ~600 square foot basement underneath. Because one of the basement foundation walls is very near (~1 foot) from the original home foundation, the concrete ...
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1answer
47 views

Patches on my california basement wall

I'm seeing large patches on my California basement wall. It is a tiny basement that is common in Los Angeles area. The basement is in the middle of the house, so it is quite far from the perimeter. ...
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1answer
42 views

Exterior of addition's foundation leaks

My driveway runs along the side of my house to the back yard. One of the ten foot sections has shifted so that it angles towards the house. Water collects there and seeps into the house. The room it ...
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1answer
41 views

Should I build a segmental retaining wall on top of a grade beam with piles?

80 foot long retaining wall that ranges from 4 feet tall on one end to 12 feet tall on the other. I am planning on a segmental wall made of Versa-Lok "Bronco 18" blocks - 1200+ pounds each. ...
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1answer
53 views

How many concrete piers do I need to support a tiny house (12x28 and 20feet high) [closed]

I need help, I am building a tiny house, I am not sure how many concrete piers do I need for a 12x28 tiny house and that will be max of 20 ft high thank you!
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2answers
59 views

Unfinished basement - options for exposed concrete wall in finished room

We're purchasing a home with a large, unfinished basement having a poured concrete foundation and walls. This home is in Minnesota, so there's a seasonal consideration with temperature and moisture. ...
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1answer
45 views

Filling gaps in a concrete floor

Our 1950's brick two story, three bedroom with a basement is a pretty common type around Toronto. We're doing some demolition and cleaning up in the basement. We are fairly sure we want to sell; our ...
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0answers
21 views

Fireplace mortar cracks

I have a large crack where the fireplace hearth meets the chimney. I’m curious if this is a foundational problem, and if it needs to be repaired by a pro, or if I should just use a sealant repair ...
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1answer
57 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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1answer
28 views

calculating screwpiles requirement in clay ground

Does anyone know a good way of calculating screw-pile requirements in clay ground? I'm in the Netherlands and this old seafloor so carrying soil type is going to be at least 10m deep before it there ...
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1answer
56 views

Foam sheeting and siding below grade

Just bought a new house and there was a newer addition that had a shallow ditch on all sides. The yard slightly slopes towards the house. I was going move some soil to properly grade, but discovered ...
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2answers
76 views

Cracks in new house concrete foundation

I am buying a new home. The foundation was poured in Sept 2019. The home is nearing completion but the floors have not yet been installed. I see cracks in the foundation. Most concerning are two ...
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1answer
210 views

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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1answer
45 views

Repair Hole in Cinder Block Foundation

I had a geothermal furnace put in recently, and with that, the old heat pump was removed. The electric from the heat pump was run through a hole through the foundation to the panel. The hole is about ...
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2answers
124 views

Holes forming under/around garage

I've noticed two holes forming in the ground, under and around my garage (so no basement or anything under that location. The house is about 3 years old. The first is under driveway, just in front of ...
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1answer
201 views

Is it OK to drill/notch an end joist (not rim/band joist) as long as it's continuously supported by a foundation wall?

I'm in the process of trying to run some CAT6 and speaker wire at various places in my house. One of the things I'd like to do is run speaker wire in the living room to a wall plate behind my sofa, ...
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1answer
107 views

Is this joint between the foundation and first row of mortar typical

Just wondering if this is a normal appearance for the area where the foundation and first row of mortar/brick meet. There are no signs of any structural cracks or anything like that in the area. Is ...
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1answer
275 views

How to seal around metal gas pipe penetration through poured concrete above ground?

I have a gas pipe that comes through my poured concrete foundation about 12 inches off the ground: It is not sealed around the pipe on the outside. The gap is definitely large enough for insects to ...
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0answers
91 views

Strange concrete pad ringed with bricks in basement

I'm developing a Victorian flat (UK) the moment and there's a room that I wanted to clear out but there appears to be a load-bearing support beam with a concrete support pad at the base...I'm ...
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1answer
54 views

Necessity/value of using cardboard or weed barrier under gravel shed foundation?

How important is it to use a weed barrier or some kind of geotextile between gravel and ground? In cases when crushed gravel is poured and tamped 6" deep as a shed foundation, on relatively flat ...

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