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
52 views

Best way to support walls of existing wooden outbuilding

I have been digging out the floor of a wooden outbuilding on my property, to prepare for laying a new concrete floor. The walls of the building have been built on top of old railway sleepers that were ...
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1answer
95 views

How to seal a pipe pass-through in a basement wall

My house is 15 years old, and ground water has suddenly started to leak into the basement around a pipe that passes through the poured concrete foundation. The method of installation complicates the ...
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3answers
676 views

How far out of square is too far?

What is a good margin of error on the diagonals for a 5x10 foot, square wood foundation? I have about 1/2" discrepancy on the diagonals. (for a shed).
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1answer
336 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
36 views

Crack in concrete floor slab

I recently pulled up carpet/padding and discovered a foundation crack. It looks to be larger on one end. It appears to be slightly horizontal, about less than 1/2 inch at it's largest end. The ...
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3answers
2k views

How can I prevent water from flowing into my carport under the wall plate?

The carport was enclosed but no additional concrete was poured. The sill was screwed directly into the concrete. As a result of being so close to to ground, water has come in under it about 2-3 inches....
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34 views

How do I design a foundation that will be frozen and thawed yearly?

I currently have a 12x12 insulated shed on slab on grade. I use it to store seedlings during the planting season. I pre-chill the room by opening it in winter and using a box fan to circulate air ...
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1answer
29 views

Wood siding rests on concrete pad. What are the alternatives?

In several areas around this house (a ranch on slab), the clapboard siding comes right to concrete walkways, resulting in peeling and rot. Short of ripping out the concrete, is there a less ...
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0answers
27 views

Yellow mesh material in slab foundation cracks

We recently purchased a home in central Florida, built in the late 80s, a stick-built home on a concrete slab. Today I noticed a small uplift and depression through the carpet. Touching the carpet, ...
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0answers
36 views

How can I fix my leaning garage wall

The gable wall in my garage is leaning. The sill plate seems to have slipped off the foundation. The sill plate is broken and the lower end of a stud is missing around where it's broken. The ...
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0answers
48 views

Is my foundation design for this garbage can hutch overcomplicated?

I am looking for feedback on the plan for a hutch I want to build for my garbage cans and table saw. I plan to have it sit on a slope next to my driveway. I’ve used a deck planning tool to guess at ...
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1answer
413 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
29 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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0answers
42 views

How to level a sloping concrete slab with a 2” difference?

I know this sounds bad and I need to give some backstory to not sound off the alarms... I’m going to give the main question first and then backstory below so you know I’m not crazy. Question: We have ...
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4answers
26k 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
47 views

Concrete Footings for 16x24 log cabin

I am buildings a 16x24 log cabin in rural West Virginia. It will not have electric, running water, or any type of HVAC. One of the biggest worries I have, as I feel I should, is the foundation. I am ...
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0answers
50 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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2answers
21 views

How to determine if damp smell, marks, cracks, mould, on internal walls is from; rising damp : condensation or other

I live on the ground floor of an art deco complex, with 2 apartments above me. We have lived here for almost 13 years and have never had a problem with damp / mould issues....other than our bathroom ...
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1answer
31 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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0answers
27 views

What is an appropriate log cabin base depth?

I'm currently in the process of building the foundations for a 5m x 3m log cabin, using sand/cement with a 32mm layer of paving slabs. In accordance with the Tiger Sheds website I am laying down 40mm ...
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1answer
48 views

Why is my cement cracking near the wall?

I have an old barn/garage that has mason block walls. The entire foundation is a concrete slab with footings for the exterior walls. For some reason, about 6 inches from the exterior walls, the ...
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2answers
23 views

Exterior foundation drain pipe location relative to the footer

Our house—built in 1989 in the Kansas City, MO area—has a walk-out basement with exterior foundation drain pipes daylighted. The drain pipe on the east wall had a complete blockage, so I dug it up in ...
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1answer
50 views

Have water seepage in basement bedroom of 5 year old home, still under home warranty

I have a rental property, about 5 years new. The basement is half underground, ground is level, not sloped. Tenant has been noting that there is slow water seepage into their bedroom floor from the ...
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1answer
59 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
20 views

Which foundation type for conservatory?

I live in a new property where due to the underlying characteristics of the land, piling was required for the foundations. Due to the additional cost, I'd like to explore what options for extension or ...
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1answer
151 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
37 views

Hydro isolation for foundation cut out (edge, not face)?

I live in Europe with a house constructed out of perforated bricks. I have sub grade basement windows. Our home inspector pointed out that the foundation edges exposed by the window channel need hydro ...
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1answer
38 views

Drilling into foundation form ties

I am in the midst of waterproofing the interior side of my basement. I have many leftover form ties that I've cut off flush with the concrete. The ties originally looked like this: My waterproofing ...
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0answers
17 views

Interior french drain with 3" footing

My basement (built 1945) has been taking on water seepage via the cold joint between the wall and floor slabs. This has been fairly steady for the last month due to a very high water table . I've ...
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0answers
767 views

How many sump pits should I have?

I have an older french drain system and after experiencing some foundation problems (horizontal crack), I've been told that my system should be updated to a more modern one which has weeping holes in ...
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1answer
86 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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4answers
78 views

Ideas for making a backyard fort moveable

I'm in the planning stage of a backyard fort similar to this, standing on six 4x4 posts with the floor roughly three feet above grade with far more structure than the linked example. Since this thing ...
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1answer
50 views

Can I dig a foundation below flood elevation outside the Floodplain?

Looking for answers from people building foundations near (not in) the 100 year floodplain. Does this trigger a floodplain build permitting process? Am I basically pigeonholed into a monolithic pour ...
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2answers
77 views

Repairing above-ground gaps and holes in foundation

I am moving into a house (built 1911) that had a few things turn up on the inspection. One corner of the basement has an indoor cistern, and there are some gaps and a hole in the cinder blocks just ...
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2answers
36 views

Foundation dimple mat with fabric or without?

It seems there are two main product types for house foundation dimple boards with fundamentally different approaches. A naked hdpe sheet where the dimple peaks are installed facing wall. Hydrostatic ...
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3answers
96 views

How can I modify this load bearing wall to allow for a French drain?

I have a basement wall made of block/poured concrete, but it's leaking. My plan is to install a French drain to take care of the leaks and prevent flooding. To complicate matters, this wall isn't ...
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3answers
187 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 ...
3
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1answer
32 views

Prepping sill for new granite steps

I am having granite steps installed. The platform will be 7" from the threshold but currently there is a 10" board sill/kickplate (white) with OSB behind it. I think the proper way is to ...
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0answers
11 views

Does FlexiSpan for foundation repair require an outside sealant?

I'm looking at foundation repair and Flexispan has been suggested. My driveway runs along the side of one crack and drains away from the house. Not much water gets into that soil. The other crack is ...
0
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1answer
51 views

Do I have a fieldstone foundation and if so, do I need to use Type O mortar?

I own a house that was built in 1890. The area of my foundation that I need to work on is an exterior section that is above ground. It is the part between my driveway and where the siding starts. I ...
1
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1answer
39 views

Seal concrete crack

My home is 60 years old and I am currently re-sealing my expansion joints with self-leveling sealant. This crack between the stairs (pier & beam foundation) and my walkway is a vertical crack as ...
0
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3answers
69 views

What alternatives are there for basement post footings besides concrete?

House is cabin construction 2x4's. Dirt floor. Main support piers in the center of the house are sunk concrete, but the beams are sagging all over. Center support piers are reasonable. I used ...
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1answer
58 views

Adding rat-slab to existing crawl-space

Unfortunately I have a rather persistent rat problem in my crawlspace and I still haven't been able to resolve it. I'm considering if it would be possible to pour a thin layer of concrete to stop ...
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1answer
73 views

How to excavate 3ft deep around perimeter of building

I have a building that I'm converting into living space for rental units. The building is on a cement slab foundation and to bring it up to code, I need to install foam board insulation around the ...
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0answers
54 views

Cracks in bricks, needs foundation work or can it be watched?

This house belongs to my mother who is in her 70's. She already needs a new roof and is saving for that. As of now she can not really afford to fix foundation so I need honest opinions. Is this ...
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2answers
259 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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0answers
44 views

How can I Repair this Crumbling Concrete Foundation?

My 1919 home has a concrete perimeter foundation. I think it suffered some water damage at some point and the surface of it is badly crumbling. I think the deeper parts are still sound. I plan on ...
6
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2answers
22k views

Am I using the correct concrete blocks for the base of my shed and how many do I need?

I'm building a Suncast Sutton storage shed. I followed the instructions and built the wooden base as described. Based on many tutorials I've read online, I decided to use concrete blocks to level ...
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1answer
46 views

Foam covering around foundation--what is it and can it be removed?

I recently moved to a new house. Portions of the foundation have some foam-like panels on top of it, in between the ground and the start of the siding. It's worn down, with holes in some spots, and ...
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2answers
100 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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