Questions tagged [basement]

For questions generally relating to habitable spaces in a home below ground level, and to foundation types that include a space of this type.

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14 views

Slight sewage smell in basement and sump pump

we started noticing an occasional sewage smell in the basement. It comes and goes. I can't figure out its cause or source. I suspect it is somehow tied to the sump pump. The sump pump was replaced by ...
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11 views

Vapor barrier VS polyurethane

We have a non-finished basement where vapor barriers and mineral wool is already installed. The basement has one face which is not underground (the house is built on a slope). A contractor advised ...
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0answers
33 views

Options for sealing off basement crawlspace

The "crawlspace" In the back left upper corner of my basement, a hole was made to enable the addition of a powder room on the main floor 15+ years ago. The basement walls are concrete and the hole ...
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1answer
49 views

Installing insulation board in basement to control moisture

I just had a basement waterproofing job done and it is doing an awesome job relieving pressure and keeping the basement flood-free (we just had a very large amount of rain here in central PA and it ...
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1answer
19 views

Exterior Wall - Stacking Fiberglass insulation and Mineral Wool insulation

I am in the process of finishing my unfinished basement and had a question about stacking insulation. When framing the basement we realized we have alot of areas which have about 6~ inches of extra ...
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1answer
36 views

Vertical crack in foundation

I live in a condo and I have a vertical crack in my foundation in my basement. A company came out twice to prime flex seal the crack which lasted for a year. unfortunately with recent rain it appears ...
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3answers
306 views

Constant humming noise in house

I'm looking for ideas on what might cause the very deep hum I hear in my house when it's quiet. It's been present 24/7 for many years. When I'm alone in the house and nothing is turned on it's ...
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1answer
57 views

Mid project finishing basement: should I rip out new framing?

I am learning that the wood framing that has just been installed (glued) in my basement really should have come after putting in continuous foam board insulation against the wall, separating the wood ...
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1answer
52 views

How to get water in my basement to flow to the floor drain

I'm in an old house that occasionally gets water in the basement. The basement isn't finished so it isn't a big deal if some water comes in right now. The problem right now is that there's a drain in ...
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1answer
41 views

How to best cover corrugated plastic along basement wall without affecting the catching of wall water?

We recently had the drain tile replaced in our basement. We are in the process of putting in vinyl planks in the unfinished portion, and have these black plastic correlated pieces lining the walls. ...
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1answer
66 views

Do I need so many fasteners and an edge gap for a basement subfloor on concrete?

I'm getting ready to install subflooring in a residential basement, which currently has exposed concrete slab. The concrete is well-cured (50 years) with no moisture problems. The plan is to lay down ...
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1answer
75 views

Basement walls above grade are wet outdoors after rain

I would appreciate any tip, help on diagnosing the symptom below. Been searching online to help diagnose symptom of "wet patch on exterior wall after rain". Did find several useful resources, ...
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1answer
37 views

Kitchen drain causes basement laundry drain pipe to overflow

We have a setup where our washer is in the basement directly below our kitchen sink. From the looks of it they both drain directly into the same sewer/drain line. To the right of the washer is a floor ...
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3answers
229 views

How to fix old un-suppported basement wall in house that has had added basement?

I have an older house (circa 1919) that was built without a basement (just a crawl space). About 1965 a basement was added. Along one of the old concrete foundation walls there is a 7 foot section ...
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36 views

Unfinished basement electrical re-wiring, protecting cables on cinderblock, also corrosion concerns

My basement has old electrical wiring, looks like it was a replacement for some even older knob and tube (which they largely left in place of course). While they did wire up lighting somewhat, though ...
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2answers
158 views

Weird orange rust spots appearing in holes on freshly painted basement cinder blocks

I've started to paint my basement with white primer, and on one wall weird orange spots appeared in the holes I had "filled" with the primer. The wall is made of dark cinder blocks which are pretty ...
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1answer
64 views

Can I add insulation over the original layer in my new home's basement?

I am looking to finish the basement in my new house that has insulation wrap installed in the basement. The insulation wrap is an R12. After studding the basement can I add additional installation ...
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1answer
96 views

Create new patio door in basement by cutting concrete

My basement has about 2.5 ft of concrete along the wall. The reason is that the outside is a slope/hill and that 2.5" depth is just dirt. I like to install a patio door to my backyard 60x80 which is a ...
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1answer
67 views

How can I change planes with a row of copper water pipes?

I have five 3/4 copper water lines coming into my mechanicals room along the ceiling - so they are nicely lined up in a horizontal plane, parallel to the plane of the ceiling. However, our manifolds ...
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3answers
139 views

What is the intended plan with this basement rough-in plumbing?

I am currently planning out the framing portion of my project and I am trying to figure out what is what with the rough in plumbing you see in the picture. I don’t have any plumbing experience and ...
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2answers
113 views

Do these materials typically contain asbestos?

Update I tested samples at a local asbestos certified lab and all came back 100% clear of asbestos. Thank you all for your advice. I’m new here and a new home owner. Just purchased a condo in a two ...
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1answer
217 views

Basement under counter sump pump

The majority of my basement is finished and I am finally getting around to finishing the small kitchen area. When the original work was completed, the plumber set it up for an under counter sump pump....
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1answer
110 views

What is this pipe in my basement?

I have a lot of water coming into my basement from a line that is next to where my water pump feeds into. It has been raining a lot lately. I found a pipe in the basement that looks like it could be a ...
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0answers
53 views

Do I need to insulate my basement?

I am currently finishing my basement and wondering if I need to insulate my basement. I have already framed all the walls. I have a below grade basement and the temp is pretty consistent. Local code ...
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3answers
16k views

How to install hydronic radiant heat over concrete slab

I'm trying to figure out the most ideal way to install hydronic radiant heat in my basement over the existing concrete slab. I've looked at several products for heat distribution, like Warmboard, ...
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2answers
46 views

slab heat pipes and radon reduction

My house has slab heat and the pipes come out of the dirt and go to the heating unit. This is located in my basement and I'm wondering how to seal it to help reduce radon entering the house.
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2answers
698 views

Plywood over rigid foam over concrete: will I have moisture issues?

Short version: If I install 3" of rigid foam over a poured concrete foundation wall that has been sealed with Xypex, will I have any moisture issues if I install plywood directly over the rigid? ...
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1answer
36 views

Basement shower construction, 2 parts!

Question one: I have a 5 inch cast iron drain pipe roughed in. Is there an adapter to put on the drain to get it down to 2 inches??? Without me having to bust the floor up and change it ...
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1answer
13 views

Framing a knee wall in front of a 1/2 height foundation wall with windows

I have a light basement with 3'6" foundation walls with windows framed above. The finished height of the window sill is 5" above the concrete sill. I want to frame a knee wall in front of the ...
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1answer
527 views

Unidentified pipe and smelly water trickling under slab into basement floor drain

Our house is in Toronto, Canada and was built in the late 1960's. We have lived here 5 years and currently rent out the basement suite. A few days ago, our tenants complained of a sewer smell ...
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2answers
322 views

Should I remove cold cellar wall insulation below grade to allow ground heat to warm the space in winter?

My house in southern Ontario, Canada, has a cold cellar under the front porch. The house also has a sump pump, located in the cold cellar. The builder insulated the perimeter basement walls, ...
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2answers
92 views

Insulating basement concrete walls - anything missing?

Live in Zone 5b, going to shoot for 2" of XPS DOW foam board. Planning on gluing it to the concrete wall with foam board glue and bracing it while it cures. It will run to either the top edge of ...
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1answer
428 views

Basement Subfloor — EPS + Plywood

I am planning to take the 1" EPS + plywood sandwich approach to my basement subfloor (pergo on top). I've read conflicting things around the plywood -- is 1/2" ply sufficient? Do I need to do two ...
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1answer
342 views

Should a bathtub be installed on a concrete slab or the subfloor that will be installed over the slab?

I am currently finishing my basement and looking to install a bathtub. I have already decided that I will be using a sub-floor in the basement. My question is: Should I place the bathtub directly on ...
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1answer
54 views

What are my options to replace this window?

So, I've got these short 11x32 inch windows that are original to the house, there's five of them. They're metal, single pane, and have large gaps between the frame and window. I've tried going to the ...
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4answers
12k views

Support Beam Splitting

I bought an older house (1917) that had renovations done in 2009. I was in the basement earlier today with the oil delivery man and I noticed some of the support beams splitting. The inspector never ...
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2answers
70 views

Should I level my basement floor if installing a subfloor?

I'd like to install a subfloor in my basement including that dimple stuff to allow moisture to dissipate. Currently, it has sheetrock walls and trim with painted concrete flooring, but that's it. A ...
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0answers
84 views

How to install drywall on existing basement stairs?

We are finishing our basement stairs, and I'm struggling with how to drywall the side that is parallel to and tight against the foundation. Should I pull down the stairs, frame the wall, hang drywall, ...
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1answer
45 views

How should I insulate basement walls and floor after water mitigation?

I've an unfinished 1k sq ft basement in Chicago with 10 inch cement foundation walls. I'll be creating a family room, bedrooms, bath, etc. I have water coming thru the floor--so Im adding drain tile ...
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2answers
309 views

Basement floor drain back up, 1/2" snake failed, what next?

The basement floor drain is having backup after the wash cycle from the washer, it doesn't backup from other water usage. I had a plumber came in to power snake with 1/2" tip (and few other tips) ...
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1answer
434 views

How would I install hydronic floor heat on top of a rigid foam insulated basement floor?

I intend to finish a part of my basement following this guideline from Fine Homebuilding and Building Science. There are two options I could come up with for installing hydronic radiant heat ...
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2answers
62 views

Proper way to secure a basement post to a metal I-beam

A home inspection noted that the center beam in our basement was not secured. What is required to secure a beam to a column, and is it really required? The house is in Oakland Co, Michigan, so ...
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1answer
38 views

Crack on basement wall/foundation wall

I noticed a crack on our basement wall or foundation wall (not sure what to call it). Our house is fairly new, built on mid 2017. We have a finished basement so there's no way to check the crack from ...
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0answers
32 views

Should I install a subfloor if I'm putting LVP in my basement?

I live in an area with temperatures from -7°F to 118°F. I'd like to put Luxury Vinyl Plank (LVP) in my concrete basement, but I've heard conflicting reports on if I need a subfloor. Some assumptions: ...
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4answers
4k views

Will adding a cool air return in the basement help with summer AC power usage?

Pretty much the title. I have a full basement. Part of it is unfinished and has the water heater, furnace, and washer / dryer. The other part (roughly 1/2 of the total space) is partially finished. It ...
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1answer
87 views

What are the best options for rock, for french drains?

I'm installing a sump pump and a bit of drain, in a clay soil basement that happens to have a spring. It is silty fine clay that has a habit of migrating with water and clogging everything. What are ...
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2answers
485 views

Attach XPS to back of stud framing?

In the basement that I'm finishing I have an irregular, rough stone foundation wall, pretty dry. I'll use 1" XPS foam insulation, then drywall. Can I build the framing on the floor, attach the XPS to ...
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2answers
92 views

Moisture is leaking through my basement walls, but the house is surrounded by concrete. Worth fixing?

I'm in Minneapolis, in a house built in 1886, fully renovated a few years ago. The basement is finished. This has been an extremely wet winter, with lots of snow and ice that is now melting. Some ...
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2answers
200 views

Does anyone know what this metal thing in the corner of my basement is?

I don't know what it is. It's sticking out of my wall. Does anyone have any ideas? It looks like a piece of metal. And lately, I've seen some dampness and water pooling on it a bit. And the area where ...
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1answer
335 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 ...